Jiapeng Liu

• Doctor of Philosophy
• PhD Student at Hong Kong University of Science and Technology

Accurately predicting the state of health for sodium-ion batteries is crucial for managing battery modules, playing a vital role in ensuring operational safety. However, highly accurate models available thus far are rare due to a lack of aging data for sodium-ion batteries. In this study, we experimentally collected 53 single cells at four temperat...

The ability to rapidly charge batteries is crucial for widespread electrification across a number of key sectors, including transportation, grid storage, and portable electronics. Nevertheless, conventional Li‐ion batteries with organic liquid electrolytes face significant technical challenges in achieving rapid charging rates without sacrificing e...

This study unveils a novel concept of symmetric protonic ceramic fuel cells (symm‐PCFCs) with the introduction of a self‐recoverable electrode design, employing the innovative material BaCo0.4Fe0.4Zr0.1Y0.1O3‐δ (BCFZY). This research marks a significant milestone as it demonstrates the bi‐functional electrocatalytic activity of BCFZY for the first...

Developing sustainable metal-free carbon-based electrocatalysts is essential for the deployment of metal-air batteries such as zinc-air batteries (ZABs), among which doping of heteroatoms has attracted tremendous interest over the past decade. However, the effect of the heteroatom covalent bonds in carbon matrix on catalysis was neglected in most s...

Gas separation is crucial for industrial production and environmental protection, with metal-organic frameworks (MOFs) offering a promising solution due to their tunable structural properties and chemical compositions. Traditional simulation approaches, such as molecular dynamics, are complex and computationally demanding. Although feature engineer...

Surface cation segregation, specifically strontium (Sr), has been identified as a primary factor contributing to the performance degradation of perovskite-based oxide electrodes used in various energy conversion devices. However, due to the complex chemistry and structure of the perovskite oxide surfaces, the mechanisms behind Sr segregation and it...

The organic light‐emitting diode (OLED) has gained widespread commercial use, yet there is a continuous need to identify innovative emitters that offer higher efficiency and a broader color gamut. To effectively screen out promising OLED molecules that are yet to be synthesized, representation learning aided high throughput virtual screening (HTVS)...

Over the last decade, exsolution has emerged as a powerful new method for decorating oxide supports with uniformly dispersed nanoparticles for energy and catalytic applications. Due to their exceptional anchorage, resilience to various degradation mechanisms, as well as numerous ways in which they can be produced, transformed and applied, exsolved...

Gas separation is crucial for industrial production and environmental protection, with metal-organic frameworks(MOFs) offering a promising solution due to their tunable structural properties and chemical compositions. Traditional simulation approaches, such as molecular dynamics, are complex and computationally demanding. Although feature engineeri...

Gas separation is crucial for industrial production and environmental protection, with metal-organic frameworks(MOFs) offering a promising solution due to their tunable structural properties and chemical compositions. Traditional simulation approaches, such as molecular dynamics, are complex and computationally demanding. Although feature engineeri...

Gas separation is crucial for industrial production and environmental protection, with metal-organic frameworks(MOFs) offering a promising solution due to their tunable structural properties and chemical compositions. Traditional simulation approaches, such as molecular dynamics, are complex and computationally demanding. Although feature engineeri...

Organic light-emitting diodes (OLEDs) have gained widespread commercial use, yet there is a continuous need to identify innovative emitters that offer higher efficiency and broader color gamut. To effectively screen out promising OLED molecules that are yet to be synthesized, we perform a representation learning aided high throughput virtual screen...

Perovskites have shown tremendous promise as functional materials for several energy conversion and storage technologies, including rechargeable batteries, (electro)catalysts, fuel cells, and solar cells. Due to their excellent operational stability and performance, high‐entropy perovskites (HEPs) have emerged as a new type of perovskite framework....

Li 2 OHCl is a promising solid-state electrolyte (SSE) for all-solid-state Li˗ion batteries thanks to its simple synthesis and low precursor costs. However, its low ionic conductivity is a challenge for its...

Urea oxidation reaction (UOR) with a low equilibrium potential offers a promising route to replace the oxygen evolution reaction for energy-saving hydrogen generation. However, the overpotential of the UOR is still high due to the complicated 6e- transfer process and adsorption/desorption of intermediate products. Herein, utilizing a cation exchang...

The biggest obstacle to the commercialization of protonic ceramic fuel cells (PCFCs) is the lack of high-performance, low-cost cathode materials. Currently, the most promising cathode materials are cobalt-based perovskites; however, the unstable phases, poor thermomechanical compatibility with other PCFC components, high cost and unsatisfactory per...

Battery management systems require efficient battery prognostics so that failures can be prevented, and efficient operation guaranteed. In this work, we develop new models based on neural networks and ordinary differential equations (ODE) to forecast the state of health (SOH) of batteries and predict their end of life (EOL). Governing differential...

Liquid organic electrolytes commonly employed in commercial Li-ion batteries suffer from safety issues such as flammability and explosions. Replacing liquid electrolytes with nonflammable electrolytes has become increasingly attractive in the development of safe, high-energy Li-metal batteries (LMBs). In this work, nonflammable, robust, and flexibl...

Battery management systems require efficient battery prognostics so that failures can be prevented, and efficient operation guaranteed. In this work, we develop new models based on neural networks and ordinary differential equations (ODE) to forecast the state of health (SOH) of batteries and predict their end of life (EOL). Governing differential...

Rechargeable sodium metal batteries (SMBs) have emerged as promising alternatives to commercial Li‐ion batteries because of the natural abundance and low cost of sodium resources. However, the overuse of metallic sodium in conventional SMBs limits their energy densities and leads to severe safety concerns. Herein, we propose a sodium‐free‐anode SMB...

Using quasi-solid electrolytes (QSEs) can make lithium metal batteries (LMBs) considerably safer. However, formulating QSEs with rate capabilities rivaling those of liquid electrolytes is extremely difficult. Herein, we develop a QSE characterized by safety, high conductivity above 2 × 10⁻³ S cm⁻¹, and high lithium-ion transference number (tLi+) ab...

BaFeO 3 -based perovskites are promising cathode materials for intermediate-temperature solid oxide fuel cells and protonic ceramic fuel cells due to their high electrocatalytic activity. However, during operation Ba has been observed...

Chromium (Cr) poisoning is one of the main sources for the performance degradation of solid oxide fuel cells (SOFCs) during long-term operation. However, the mechanism of Cr poisoning induced degradation...

Reversible protonic ceramic cells (RePCCs) are limited by several factors, including high cost, poor stability, and insufficient fuel electrode activity toward fuel oxidization/generation reactions. Herein, a novel Ni−Fe metal‐supported RePCC (MS‐RePCC) to address these issues simultaneously is proposed. Specifically, the Ni−Fe support possesses go...

Solid‐state batteries (SSBs) are an emerging technology for safe and high‐energy‐density electrochemical energy storage. Unfortunately, SSBs suffer from inadequate ionic conductivity and sluggish interfacial transport at subzero temperatures, which limit their widespread application. Herein, a flexible, stable, and highly conductive quasi‐solid pol...

Owing to the low theoretical potential of the urea oxidation reaction (UOR), urea electrolysis is an energy‐saving technique for the generation of hydrogen. Herein, a hierarchical structure of CuO nanowires decorated with nickel hydroxide supported on 3D Cu foam is constructed. Combined theoretical and experimental analyses demonstrate the high rea...

Developing cathodes capable of working at intermediate temperatures (IT) is key to improving solid oxide fuel cells’ (SOFC) durability, ease of operation, and manufacturing cost reduction. BaFeO3-δ (BFO)-based perovskites are ideal candidates because of their fast kinetics, which is due to the mixed conduction of oxygen vacancies and electron-holes...

Perovskite‐based oxides attract great attention as catalysts for energy and environmental devices. Nanostructure engineering is demonstrated as an effective approach for improving the catalytic activity of the materials. The mechanism for the enhancement, nevertheless, is still not fully understood. In this study, it is demonstrated that compressiv...

Single-atom catalysts have been widely investigated for several electrocatalytic reactions except electrochemical alcohol oxidation. Herein, we synthesize atomically dispersed platinum on ruthenium oxide (Pt 1 /RuO 2 ) using a simple impregnation-adsorption method. We find that Pt 1 /RuO 2 has good electrocatalytic activity towards methanol oxidati...

Aqueous Zn-ion batteries are promising and safe energy storage technologies. However, current aqueous electrolyte Zn-ion battery technology is hindered by undesirable reactions between the electrolyte and electrodes, which can lead to Zn dendrite growth, gas evolution, and cathode degradation. In this study, a hydrated gel electrolyte (HGE) that co...

Reversible protonic ceramic cells (RePCCs) can facilitate the global transition to renewable energy sources by providing high efficiency, scalable, and fuel‐flexible energy generation and storage at the grid level. However, RePCC technology is limited by the lack of durable air electrode materials with high activity toward the oxygen reduction/evol...

Tailoring interfaces in heterostructured electrocatalysts is an optimal strategy for improving the electrocatalytic performance, yet determining which active center to adjust is still extremely challenging. Herein, we report a facile approach to construct a novel heterostructured electrocatalyst of MnSxO2-x/MnCo2S4. The density and structure of the...

Coupled metal-nitrogen-carbon (M-Nx-C) materials show great promise as platinum-group-metal (PGM) free catalysts for the oxygen reduction reaction (ORR). Herein, we report a facile strategy to construct atomically dispersed Co-Fe dual sites enriched on the surface of nitrogen doped microporous carbon (NC) as an efficient electrocatalyst for ORR. Sy...

p>Battery management systems require efficient battery prognostics so that failures can be prevented, and efficient operation guaranteed. In this work, we develop new models based on neural networks and ordinary differential equations (ODE) to forecast the state of health (SOH) of batteries and predict their end of life (EOL). Governing differentia...

Rationally manipulating the in situ formed catalytically active surface of catalysts remains a tremendous challenge for a highly efficient water electrolysis. Here we present a cationic redox-tuning method to modulate in situ catalyst leaching and to redirect the dynamic surface restructuring of layered LiCoO2–xClx (x = 0, 0.1 or 0.2), for the elec...

BaFeO3−δ-derived perovskites are promising cathodes for intermediate temperature solid oxide fuel cells. The activity of these perovskites depends on the number of oxygen vacancies in their lattice, which can be tuned by cationic substitution. Our first-principle calculations show that Ag is a promising substitute for the Fe site, resulting in a re...

Solid polymer electrolytes (SPEs) and gel polymer electrolytes (GPEs) show great promise for the realization of commercial, high performance Li-metal batteries (LMBs). However, the interfacial and high-temperature instability of GPEs, and the low room-temperature ionic conductivity of SPEs still limit their practical implementation. This article pr...

Supported metal catalysts represent one of the major milestones in heterogeneous catalysis. Such catalytic systems are feasible for use in a broad range of applications, including renewable energy devices, sensors, automotive emission control systems, and chemical reformers. The lifetimes of these catalytic platforms depend strongly on the stabilit...

Lithium-rich antiperovskites (APs) have attracted significant research attention due to their ionic conductivity above 1 mS cm-1 at room temperature. However, recent experimental reports suggest that proton-free lithium-rich APs, such as Li3OCl, may not be synthesized using conventional methods. While Li2OHCl has a lower conductivity of about 0.1 m...

Sodium-ion batteries have been considered a cost-effective alternative to lithium-ion batteries because of the cheap and abundant sodium reserves. However, the sluggish kinetics arising from the slow ion and electron transport, particularly at high rates, is the main bottleneck of fast sodium storage. Here, few-layer MoSe2 encapsulated by nitrogen/...

With the rapid development of wearable devices, there is an increasing demand for ultra-safe flexible lithium-ion batteries (LIBs) capable of delivering high energy density. Because it can provide the highest possible capacity of 3860 mAh g⁻¹, lithium metal has drawn tremendous research attention. However, Li is a highly reactive metal that grows d...

Li‐ion batteries (LIBs) are the energy storage systems of choice for portable electronics and electric vehicles. Due to the growing deployment of energy storage solutions, LIBs are increasingly required to function safely and steadily over a broad range of operational conditions. However, the conventional electrolytes used in LIBs will malfunction...

Electrochemical impedance spectroscopy (EIS) is one of the most widely used experimental tools in electrochemistry and has applications ranging from energy storage and power generation to medicine. Considering the broad applicability of the EIS technique, it is critical to validate the EIS data against the Hilbert transform (HT) or, equivalently, t...

Herein, a series of molecular actuators based on thecrystals of (E)-2-(4-fluorostyryl)benzo[d]oxazole ( BOAF4), (E)-2-(2,4-difluorostyryl)benzo[d]oxazole ( BOAF24), (E)-2-(4-fluorostyryl)benzo[d]thiazole ( BTAF4) and (E)-2-(2,4-difluorostyryl)benzo[d]thiazole ( BTAF24) showed uniquebending behavior under UV irradiation. The 1D crystals of BOAF4 and...

Metal anodes possess the potential to disrupt the limits imposed by intercalation compounds and achieve a higher storage density for next-generation rechargeable batteries. This study is dedicated to engineering a scalable scaffold made of carbon nanofibers (CNFs) modified with embedded ZnO nanoparticles as facile nucleation sites for enhanced Na p...

Rechargeable batteries have significantly helped to effectively use renewable energy sources as well as to intensively expand the electrification of vehicles. To achieve such goals, new advanced materials are urgently required. Atomically dispersed materials (ADMs) with single-atom metals supported on substrates feature uniform metallic sites and r...

div>Herein, a series of molecular actuators based on the crystals of (E)‐2‐(4‐fluorostyryl)benzo[d]oxazole (BOAF4), (E)‐2‐(2,4‐difluorostyryl)benzo[d]oxazole (BOAF24), (E)‐2‐(4‐fluorostyryl)benzo[d]thiazole (BTAF4) and (E)‐2‐ (2,4‐difluorostyryl)benzo[d]thiazole (BTAF24) showed unprecedented different bending behavior under UV irradiation. BOAF4...

p>Electrochemical impedance spectroscopy (EIS) is one of the most widely used experimental tools in electrochemistry and has applications ranging from energy storage and power generation to medicine. Considering the broad applicability of the EIS technique, it is critical to validate the EIS data against the Hilbert transform (HT) or, equivalently,...

Fast cationic conduction is necessary for a number of solid-state technologies and is particularly critical for solid-state batteries as solid electrolytes are typically poor conductors. This article illustrates the concept of low-dimensional networked (low-DN) anti-perovskite via first-principles computations and shows that superionicity (i.e. the...

Electrochemical impedance spectroscopy (EIS) is the established tool for the study of many electrochemical experiments. While the analysis of EIS data is challenging, this can be assisted by the distribution of relaxation time (DRT) method. However, obtaining the DRT is difficult as the underlying problem is ill-posed. Inspired by recent advances i...

The increasing cost and limited availability of lithium have prompted the development of high-performance sodium-ion batteries (SIBs) as a potential alternative to lithium-ion batteries. However, it has been a critical challenge to develop high-performance anode materials capable of storing and transporting Na+ efficiently. Amongst the various opti...

Electrochemical impedance spectroscopy (EIS) is one of the most important techniques in electrochemistry. However, analyzing the EIS data is not a simple task. The distribution of relaxation times (DRT) method offers an elegant solution to this considerable challenge. In addition to that, the DRT method can be used to obtain the time characteristic...

The need for clean and efficient energy conversion systems has stimulated tremendous research activities in the area of energy systems. Solid oxide fuel cells stand out because of their high efficiency and low emissions. In spite of the promise, to commercialize solid oxide fuel cells the operating temperature needs to be reduced below 800 °C. Unfo...

Li-metal batteries (LMBs) with composite polymer electrolytes (CPEs) have attracted considerable attention compared with conventional Li-ion batteries. However, the uncontrolled Li deposition and the flammability of CPEs are still pressing issues. In this article, a non-flammable CPE is fabricated. The CPE consists of a poly(vinylidene) matrix, Li6...

The search for next-generation solid-state superionic conductors has attracted significant attention. Among Na superionic conductors, Na11Sn2PS12 has been reported to have a room temperature ionic conductivity of 1.4 mS/cm. In this study, we employ density functional theory to study the stability of Na11Sn2PS12 and further explore the substitution...

Lithium-oxygen batteries (LOBs) possess the highest theoretical specific density among all types of lithium batteries, making them an ideal candidate to replace the current Li ion batteries for next-generation electric vehicle applications. However, designing highly active catalysts with high electronic conductivities to kinetically accelerate the...

Ternary metal sulfides and ternary metal oxides have received much attention as potential electrodes for high performance rechargeable batteries. Herein, MnCo2S4 nanosheets are grown on carbon paper (MCS/CP) via facile electrodeposition followed by low temperature vulcanization for application in Li-O2 batteries for the first time. The electrochemi...

The rational design of highly-active and durable electrocatalysts for overall water splitting is a formidable challenge. In the present work, a double perovskite oxide, i.e., NdBaMn2O5.5, is proposed as a bifunctional electrode material for water electrolysis. Layered NdBaMn2O5.5 demonstrates significant improvement in catalyzing oxygen and hydroge...

In this article, we develop a new finite-element-based model for the simulation of the electrochemical impedance spectroscopy (EIS) response of mixed ionic electronic conducting (MIEC) thin films. We first validated the model against experimental data for Sm-doped CeO2 (SDC) symmetrical films deposited on a Yittria-stabilized ZrO2 (YSZ) substrate,...