Xue-Ping Gao

Xue-Ping Gao
Nankai University | NKU · Institute of New Energy Material Chemistry

About

227
Publications
33,671
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16,686
Citations
Citations since 2017
66 Research Items
7889 Citations
201720182019202020212022202302004006008001,0001,2001,400
201720182019202020212022202302004006008001,0001,2001,400
201720182019202020212022202302004006008001,0001,2001,400
201720182019202020212022202302004006008001,0001,2001,400
Introduction
Skills and Expertise

Publications

Publications (227)
Article
Lithium electrodes have gained increasing attention in recent years for their promising applications in high-energy-density secondary batteries. However, structural instability during cycling remains a considerable obstacle to development. In this study, a dimensionally stable Li-Mg/Cu composite electrode was fabricated. Cu foam as a plate grid can...
Article
Photovoltaic technologies for indoor energy harvesting have attracted considerable attention because of the unique power requirements associated with the Internet of Things. However, intermittent power supplies, low light intensities, and security issues are barriers to the development of indoor photovoltaic technology. Herein, we demonstrate an al...
Article
Sulfide solid electrolyte is a promising candidate for the development of high-energy lithium-sulfur (Li-S) batteries. However, the concurrent improvement of ionic conductivity, bulk air stability, and compatibility of the electrolyte/electrode interface of sulfide solid electrolyte remains a huge challenge. Herein, we propose a dual-source doping...
Article
Halide solid electrolytes (HSEs) could be coated on high-voltage oxide cathodes at molecular-level via a solution process, which is highly favorable for reducing the interface impedance. However, during the preparation of composite cathodes, hydrate intermediates of HSEs are easily hydrolyzed to produce inactive impurities. In this work, the vacuum...
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Elemental sulfur possesses an ultra‐high theoretical specific capacity, while the practical application of sulfur in lithium–sulfur (Li–S) batteries is seriously hindered by the sluggish redox kinetics and serious shuttle effect. Enhancing the catalytic activity of the sulfur host by a rational structural design is the key to address these issues....
Article
Lithium (Li) metal is regarded as the most promising anode material for next-generation secondary batteries due to its high theoretical specific capacity and low potential. However, the huge volume change and uncontrollable dendrites growth lead to its structural instability during charge/discharge processes. Herein, a lithium alloy-based composite...
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Lithium–sulfur battery is recognized as one of the most promising next-generation energy storage devices. But the volumetric energy density of sulfur cathode is insufficient as compared with the cathodes of the commercial lithium-ion batteries owing to the low tap density of nonpolar and light-weight carbon materials as sulfur hosts. In this work,...
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Lithium‐metal (Li) electrode has been regarded as an excellent option to increase the energy density of next‐generation secondary batteries due to its low electrochemical potential and ultrahigh theoretical capacity. However, Li electrodes suffer from poor Coulombic efficiency (CE) and uneven lithium deposition issues during cycling that severely r...
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The rationale for ambient degradation behaviors in hole transport layer (HTL)‐free carbon‐based perovskite solar cells (PSCs) still remains a mystery, although carbon‐based PSCs have been the frontrunner among the emerging next‐generation photovoltaics owing to their low cost of materials and fabrication process, as well as the exceptional durabili...
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Free Fulltext Link for 50 days: "https://authors.elsevier.com/a/1e%7EtS33-eRYRb" Ni-rich layered cathode materials are being paid much attention to because their high capacity can handily improve energy density of lithium-ion batteries. However, Ni-rich cathode materials still suffer from the deficiencies such as poor cycle stability, weak structu...
Article
Sulfur element possesses an ultrahigh theoretical specific capacity, while the utilization of sulfur in the whole cathode is lower obviously owing to the sluggish kinetics of sulfur and discharged products, limiting the enhancement on energy density of lithium‐sulfur batteries. Herein, for the first time, Fe0.24Co0.26Ni0.10Cu0.15Mn0.25 high‐entropy...
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Simultaneously harvesting, converting and storing solar energy in a single device represents an ideal technological approach for the next generation of power sources. Herein, we propose a device consisting of an integrated carbon-based perovskite solar cell module capable of harvesting solar energy (and converting it into electricity) and a recharg...
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Introducing defects into 2D materials can increase the coordinatively unsaturated sites that are usually also catalytically active sites. How does the level of defects influence catalytic performance and how to take advantage of defects to optimize the 2D materials? In this work, anionic Se vacancies and edge dislocations are regulated in 2D WSe2 a...
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High-Ni layered oxide cathodes hold a great promise for fabricating high energy lithium-ion batteries. However, the oxygen evolution during cycling is a crucial factor on the structure deterioration, potential change and capacity decay of cathodes, limiting the commercial application of high-Ni (Ni>0.9) layered oxides in batteries. Herein, we demon...
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Rutile TiO2 (R-TiO2) produced by chemical bath deposition (CBD) is widely considered as the desired ETL for PSCs. However, the understanding of the growth mechanism of R-TiO2 ETL and its general regular pattern affecting PCE is underappreciated. Here, we demonstrate the growth mechanism of TiO2 on fluorine-doped SnO2 substrate (FTO) and reveal that...
Article
Despite their high theoretical energy density, the application of lithium-sulfur batteries is seriously hindered by the polysulfide shuttle and sluggish kinetics, especially with high sulfur loading and under low electrolyte usage. Herein, to facilitate the conversion of lithium polysulfides, nickel-boron (Ni-B) alloy nanoparticles, dispersed unifo...
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The exploration of new catalytic hosts is highly important to tackle the sluggish electrochemical kinetics of sulfur redox for achieving high energy density of lithium‐sulfur batteries. Herein, for the first time, we present high‐entropy oxide (HEO, (Mg0.2Mn0.2Ni0.2Co0.2Zn0.2)Fe2O4) nanofibers as catalytic host of sulfur. The HEO nanofibers show a...
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The organic–inorganic hybrid perovskite solar cells present a rapid improvement on power conversion efficiency from 3.8% to 25.5% in the past decades. Owing to the tuneable bandgaps, low‐cost, and ease of fabrication, perovskites become ideal candidate materials for fabricating tandem solar cells, especially for efficient and high‐voltage monolithi...
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Lithium–sulfur (Li–S) battery is one of the most promising next‐generation rechargeable batteries. Lots of fundamental research has been done for the problems during cycling like capacity fading and columbic efficiency reducing owing to severe diffusion and migration of polysulfide intermediates. In the early stage, a wide variety of carbon materia...
Article
Lithium metal is recognized as the “Holy Grail” of anode materials for high-energy-density batteries. However, the application of the lithium anode is seriously hindered due to its instability especially during the large-capacity lithium stripping/plating process. In this study, a dimensionally stable Li composite electrode is fabricated by electro...
Article
Li‐rich Mn‐based layered oxides are regarded as the most promising cathode materials for advanced lithium‐ion batteries with energy density as high as 400 Wh kg−1. However, decline of capacity and discharge potential derived from phase transformation during cycling is still an obstacle for practical utilization of Li‐rich cathode materials. Undoubt...
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Lithium–sulfur battery possesses a high energy density; however, its application is severely blocked by several bottlenecks, including the serious shuttling behavior and sluggish redox kinetics of sulfur cathode, especially under the condition of high sulfur loading and lean electrolyte. Herein, hollow molybdate (CoMoO4, NiMoO4, and MnMoO4) microsp...
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Lithium–sulfur (Li–S) batteries hold the promise of the next generation energy storage system beyond state‐of‐the‐art lithium‐ion batteries. Despite the attractive gravimetric energy density (WG), the volumetric energy density (WV) still remains a great challenge for the practical application, based on the primary requirement of Small and Light for...
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The high-nickel layered oxides are potential candidate cathode materials of next-generation high energy lithium-ion batteries, in which higher nickel/lower cobalt strategy is effective for increasing specific capacity and reducing cost of cathode. Unfortunately, the fast decay of capacity/potential, and serious thermal concern are critical obstacle...
Article
Solar cells hold a function of photovoltaic conversion, while rechargeable metal batteries have an advantage of high energy storage. The conventional charge mode of batteries is made based on complete utilization of electric energy. The combination of solar cells and rechargeable metal batteries brings a new opportunity for the development of photo...
Article
Metallic lithium as an anode is an ultimate ideal for rechargeable lithium batteries with high energy density such as lithium-oxygen batteries and lithium-sulfur batteries. However, the excess reactivity and asymmetrical dissolution-deposition of the metallic lithium anode make it impossible to support a stable long charge-discharge cycling. To pro...
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https://doi.org/10.1021/acssuschemeng.0c09241 As one of the most promising cathode materials in lithium-ion batteries, nickel-rich cathode materials have been widely studied due to their high specific capacity and high operating voltage to realize the energy density of 300 Wh kg–1. However, the oxidative decomposition of electrolyte catalyzed by tr...
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The liquid electrolyte in a lithium-sulfur battery is important for the dissolution-deposition reaction through the solubility of polysulfides. To get insight into the sulfur chemistry, fundamental understanding of the dissolved polysulfides should be explored. In this work, the dissolved forms of Li2S6, as prototypical polysulfides, in 1,2-dimetho...
Article
Li-rich layered oxide cathode materials are regarded as an attractive candidate of next-generation Li-ion batteries (LIBs) to realize an energy density of >300 Wh kg–1. However, challenges such as capacity fade, cycle life, oxygen release, and structural transformation still restrain its practical application. Micro/nanotechnology is one of the eff...
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Realizing high energy density is the desirable target of the research and development for lithium−sulfur battery. However, the demands of high sulfur content in composite, high sulfur loading in electrode, and low electrolyte usage are likely excessive for reaching both high gravimetric and volumetric capacities of sulfur cathode with conventional...
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Solar energy is one of the most appealing clean energies to replace fossil fuel. However, the low power output is the bottleneck that hinders the effective usage of solar energy. Herein, we propose quasi-solid-state solar rechargeable capacitors for solar energy multiplication effect and effective application based on Janus modified electrode. The...
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For high‐energy lithium–sulfur batteries, the poor volumetric energy density is a bottleneck as compared with lithium–ion batteries, due to the low density of both the sulfur active material and sulfur host. Herein, in order to enhance the volumetric energy density of sulfur cathode, a universal approach is proposed to fabricate a compact sulfur ca...
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Lithium–sulfur battery is recognized as one of the most promising next-generation energy storage devices. However, the low specific capacity and inferior cycling stability of cathode are real bottlenecks in practical lithium–sulfur battery, owing to the low sulfur content and tap density of cathode with light-weight and nonpolar carbon host materia...
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Although the gravimetric energy density of lithium sulfur battery is very encouraging, the volumetric energy density still remains a challenge for the practical application. To achieve the high volumetric energy density of battery, much attention should be paid to the sulfur cathode. Herein, we introduce heavy lithium cobalt oxide (LiCoO 2) nanofib...
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It is undoubtable that the use of solar energy will continue to increase. Solar cells that convert solar energy directly to electricity are one of the most convenient and important photoelectric conversion devices. Though silicon‐based solar cells and thin‐film solar cells have been commercialized, developing low‐cost and highly efficient solar cel...
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Effective hosts of sulfur are essential for the application of lithium−sulfur battery. However, various refined nanomaterials or carbon-based hosts possess low density, high surface area and large porosity, leading to undesirable reduction on both gravimetric and volumetric energy densities. Herein, spherical metal oxides with high tap density are...
Article
Nickel-rich layered oxides with their large reversible capacity are considered to be some of the most promising cathode materials for high-energy Li-ion batteries. However, the fast decay of capacity and potential of Ni-rich layered oxides occurs unavoidably during long-term cycling, which is harmful to the stable output of energy density of Li-ion...
Article
Lithium–sulfur (Li–S) battery as a promising energy storage system has attracted intensive attention, but its development still be restricted by the electrical insulation of elemental sulfur and severe shuttle effect caused by lithium polysulfides (LiPS) in ether electrolytes. In this work, a functional sulfur cathode using thiol-modified carbon na...
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Conventional Li-rich layered oxides are composed of the intergrowth of LiMO2R3‾m and Li2MnO3 C2/m phases, and provide high capacity as cathode materials for Li-ion rechargeable battery. However, the mechanism behind capacity and voltage fading still needs further understanding. In this work, based on intensive analysis on crystalline phase and inte...
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Solar cells and rechargeable batteries are two key technologies for energy conversion and storage in modern society. Here, an integrated solar‐driven rechargeable lithium–sulfur battery system using a joint carbon electrode in one structure unit is proposed. Specifically, three perovskite solar cells are assembled serially in a single substrate to...
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Full-text available
Lithium–sulfur battery is recognized as one of the most promising energy storage devices, while the application and commercialization are severely hindered by both the practical gravimetric and volumetric energy densities due to the low sulfur content and tap density with lightweight and nonpolar porous carbon materials as sulfur host. Herein, for...
Article
A lithium-sulfur (Li-S) battery is widely regarded as one of the most promising technologies for energy storage because of its high theoretical energy density and cost advantage. However, the shuttling of soluble polysulfides between the cathode and the anode and the consequent lithium anode degradation strongly limit the safety and electrochemical...
Article
High-Ni layered oxides are potential cathodes for high energy Li-ion batteries due to their large specific capacity advantage. However, the fast capacity fade by undesirable structural degradation in liquid electrolyte during long-term cycling is a stumbling block for the commercial application of high-Ni oxides. In this work, a functional gel poly...
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Full-text available
Lithium–sulfur (Li–S) batteries are regarded as the promising next‐generation energy storage device due to the high theoretical energy density and low cost. However, the practical application of Li–S batteries is still limited owing to the cycle stability of both the sulfur cathode and lithium anode. In particular, the instability in the bulk and a...
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The Compliant Golden‐Hooped Rod is a magical staff wielded by the Monkey King, Sun Wukong. The magical heavy Iron Rod was originally left inside Dragon Palace by Yu the Great, after taming the flood. In article number 1803477 Xue‐Ping Gao and co‐workers report the design of NiCo2O4 nanofibers, just like The Compliant Golden‐Hooped Rod in Dragon Pal...
Article
Ni-rich layered oxides are regarded as the promising candidate for high energy density lithium-ion batteries owing to the high specific capacity. However, Ni-rich layered oxides suffer a rapid capacity fade, which is related to the undesirable structure evolution during cycling. Herein, an in-situ surface modification strategy by using Al2O3 nanofi...
Article
A quasi-solid-state solar rechargeable battery with polyethylene oxide gel electrolyte as cathode and anode electrolyte is proposed in this work.In the fabricated battery, solar energy can be converted and stored as chemical energy under light irradiation, which is further to electrical energy in the dark as well. In the meantime, the working stabi...
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Both the energy density and cycle stability are still challenges for lithium–sulfur (Li–S) batteries in future practical applications. Usually, light‐weight and nonpolar carbon materials are used as the hosts of sulfur, however they struggle on the cycle stability and undermine the volumetric energy density of Li–S batteries. Here, heavy NiCo2O4 na...
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Biomineralization is a green and skillful approach to prepare Li-rich layered oxides with hierarchical micro/nano structure as high-performance cathode for lithium-ion batteries. In this work, to enhance the high-rate capability and cycle stability, Li-rich layered oxide Li1.17Ni0.14Co0.13Mn0.56O2 microspheres are synthesized through a simple biomi...
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Full-text available
Nickel-rich layered oxides with their large reversible capacity are considered to be some of the most promising cathode materials for high energy Li-ion batteries. However, the fast decay of capacity and potential of Ni-rich layered oxides occurs unavoidably during long term cycling, which is harmful to the stable output of energy density of Li-ion...
Article
Bio-mineralization technology is a feasible and promising route to fabricate phosphate cathode materials with hierarchical nanostructure for high performance lithium-ion batteries. In this work, in order to improve the electrochemical performance of LiMn0.8Fe0.2PO4, hierarchical LiMn0.8Fe0.2PO4/carbon nanospheres are wrapped in-situ with N-doped gr...
Article
Low sulfur utilization and poor cycle life of the sulfur cathode with high sulfur loadings remain a great challenge for lithium-sulfur (Li-S) battery. Herein, the free-standing carbon film consisting of porous carbon nanofibers (PCNFs) and carbon nanotubes (CNTs) is successfully fabricated by electrospinning technology. The PCNF/CNT film with three...
Article
Carbon materials have attracted extensive attention as the host materials of sulfur for lithium–sulfur battery, especially those with 3D architectural structure. Here, a novel 3D graphene nanosheet–carbon nanotube (GN–CNT) matrix is obtained through a simple one-pot pyrolysis process. The length and density of CNTs can be readily tuned by altering...
Article
Solar water splitting is an effective approach to hydrogen production and application of solar energy. However, the photo-generated hydrogen should be initially stored in high pressure cylinder and subsequently applied in hydrogen-oxygen fuel cells. Herein, a solar rechargeable battery is proposed based mainly on hydrogen storage mechanism in dual-...
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Carbon nitride (CNx) films supported on fluorine-doped tin oxide (FTO) glass are prepared by radio frequency magnetron sputtering, in which the film thicknesses are 90∼100 nm, and the element components in the CNx films are in the range of x = 0.15∼0.25. The as-prepared CNx is for the first time used as counter electrode for dye-sensitized solar ce...
Article
Microporous carbon polyhedrons (MCPs) are encapsulated into polyacrylonitrile (PAN) nanofibers by electrospinning the mixture of MCPs and PAN. Subsequently, the as-prepared MCPs-PAN nanofibers are employed as sulfur immobilizer for lithium-sulfur battery. Here, the S/MCPs-PAN multi-composites integrate the advantage of sulfur/microporous carbon and...
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In an all-solid-state perovskite solar cell, methylammonium lead halide film is in charge of generating photo-excited electrons, thus its quality can directly influence the final photovoltaic performance of the solar cell. This paper accentuates a very simple chemical approach to improving the quality of a perovskite film with a suitable amount of...
Article
Li-rich layered oxides with a large discharge capacity have attracted considerable attention as cathodes for high energy lithium-ion batteries. To further enhance the discharge capacity and thermal stability of these Li-rich layered oxides, Mn-based metal–organic frameworks (MOFs) with high surface areas, large pore sizes, and stable architectures...
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Li-rich layered oxides as cathode materials have attracted considerable attention worldwide owing to their high capacity and low cost. However, one of the inherent drawbacks of Li-rich layered oxides is the gradual capacity fading and potential decline during long cycling, caused by the slow structure transition from layered structure to spinel. Th...
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Copper hexacyanoferrate (CuHCF) nanoparticles with Prussian blue structure are prepared via a simple co-precipitation method, which present the ability to insert Al ions reversibly in aqueous solution. CuHCF is verified to be a promising cathode material for aqueous Al-ion batteries.
Article
The Li-rich layered Li(Li0.17Ni0.2Mn0.58Co0.05)O-2 oxide was prepared by a spray-drying method. Subsequently, the surface modification with TiO2(B) nanocrystallites (2wt%, 4wt%, 6wt%, 8wt%) was introduced into the Li-rich layered Li(Li0.17Ni0.2Mn0.58Co0.05)O-2 oxide by precipitation method. It is demonstrated that there is no obvious change in the...
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Li-rich layered oxides are of great importance as cathode materials for advanced lithium ion batteries. In this work, Li-rich layered Li(Li0.17Ni0.2Co0.05Mn0.58)O2 oxide is synthesized by a spray-drying method, and modified subsequently with CeO2 nanoparticles. It is demonstrated that the surface of the Li(Li0.17Ni0.2Co0.05Mn0.58)O2 oxide is modifi...