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Publications (54)
Solid-state lithium batteries (SSBs) have attracted attention as the next-generation high-safety lithium batteries due to their high energy density, excellent security, and electrochemical stability. Currently, polyvinylidene fluoride (PVDF) is considered one of the most crucial materials in solid polymer electrolytes because of its flexibility and...
In the context of ‘energy shortage’, developing a novel energy-based power system is essential for advancing the current power system towards low-carbon solutions. As the usage duration of lithium-ion batteries for energy storage increases, the nonlinear changes in their aging process pose challenges to accurately assess their performance. This pap...
Silicon (Si) is a promising anode material for next-generation lithium-ion batteries (LIBs) with its high theoretical specific capacity (4200 mAh/g). However, Si anode has a huge volume change rate (> 300%) and high cost compared to graphite, which limits the commercial application of Si anode. Carbon coating can effectively tackle the volume chang...
Silicon (Si) anode is a promising anode material for lithium ion batteries as its high theoretical specific capacity. However, the commercial application of Si anode faces significant challenges, primarily stemming from its substantial volume change (> 300) and associated high costs. In this work, porous silicon was prepared by etching low-cost mic...
Lithium (Li) metal is regarded as a promising anode for high-energy-density Li-ion batteries because of its high theoretical specific capacity and low potential. Unfortunately, the safety issues derived from Li...
In recent years, ternary nickel-rich layered oxides have gradually replaced traditional binary cathode materials in the lithium-ion battery market due to their advantages of high energy density and environmental protection. However, their structural instability of cathode materials has seriously affected the cycle performance of the battery. In ord...
In recent years, fire and explosion accidents caused by high temperatures of lithium-ion batteries have become increasingly frequent, and the safety and reliability of batteries have been of great concern. Battery temperature monitoring is an important means to prevent the occurrence of safety accidents, but at present, it mainly focuses on the ext...
The lithium metal anode has attracted much attention from researchers because of its extremely high theoretical capacity and most negative potential, but some problems caused by lithium dendrites grown on the lithium metal anode have seriously hindered its practical application. With the development of computer technology and the improvement of qua...
In order to solve the energy crisis, energy storage technology needs to be continuously developed. As an energy storage device, the battery is more widely used. At present, most electric vehicles are driven by lithium-ion batteries, so higher requirements are put forward for the capacity and cycle life of lithium-ion batteries. Silicon with a capac...
Lithium-ion batteries are favored by the electric vehicle (EV) industry due to their high energy density, good cycling performance and no memory. However, with the wide application of EVs, frequent thermal runaway events have become a problem that cannot be ignored. The following is a comprehensive review of the research work on thermal runaway of...
Solid electrolyte is an important part of all-solid-state lithium-ion battery, and it is the key and difficult point in the research of all-solid-state lithium-ion battery. Both solid polymer electrolyte and inorganic ceramic electrolytes have obvious deficiencies in electrochemical and mechanical properties, but polymer-inorganic filler solid comp...
The electrochemical technology and the density functional theory can provide a new idea for the intelligent detection and protection of Chinese traditional appliances. Lithium-ion battery is a typical electrochemical energy storage system, which is used as the core power supply component of sensor equipment to ensure the normal operation of intelli...
Ni-rich ternary cathode materials for Li-ion batteries have the advantages of high reversible capacity, high energy density, improved rate performance and low cost. However, they suffer from problems such as fast capacity decay, poor cycle performance and thermal instability. In this study, we review the structure of Ni-rich ternary cathode materia...
The irreversible phase transition of LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode materials easily occurs in high voltage (> 4.5 V) charging processes, which aggravates the corrosion of electrolyte on the materials and seriously affects the safety and cycling performance of lithium-ion batteries. In this paper, K and Cl ions were dual-doped into NCM523 by...
Surface coating and ion doping are of great significance for improving the electrochemical performance of cathode materials for lithium-ion batteries. In this study, WO3-coated and Mg²⁺-doped LiNi0.8Co0.1Mn0.1O2 cathode materials were successfully synthesised by the coprecipitation and wet coating methods. X-ray diffraction and energy-dispersive X-...
The design of Ni-rich core and Mn-rich shell is of great significance for improving the electrochemical performance of lithium-ion battery cathode materials at high voltage. The core-shell structure LiNi0.8Co0.1Mn0.1O2 (CS-NCM811) cathode materials is prepared through co-precipitation method. XRD shows that the cathode materials have α-NaFeO2 layer...
To address increasingly prominent energy problems, lithium-ion batteries have been widely developed. The high-nickel type nickel–cobalt–manganese (NCM) ternary cathode material has attracted attention because of its high energy density, but it has problems such as cation mixing. To address these issues, it is necessary to start from the surface and...
The integration of electrochemical technology and new media technology provides new ideas for the digital display of intangible cultural heritage. Lithium-ion battery is a typical electrochemical energy storage system that is used as the core power supply component of a display device to ensure that the digital display works smoothly. For the power...
Extending the working voltage is an effective approach to enhance the reversible capacity of LiNi1-x-yCoxMnyO2 layered oxide cathode materials. However, the layered Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode suffers a severe structural instability and rapid capacity decrease during high-voltage cycling (4.6 V). In order to solve these problems, the surfac...
Nickel-rich layered LiNi1-x-yCo
x
Mn
y
O2 (LiMO2) is widely investigated as a promising cathode material for advanced lithium-ion batteries used in electric vehicles, and a much higher energy density in higher cut-off voltage is emergent for long driving range. However, during extensive cycling when charged to higher voltage, the battery exhibits s...
Carbon-coated and doped mesoporous silicon/carbon (m-Si/C) composites were successfully prepared via carbon coating and molten magnesiothermic reduction by using mesoporous silica (SBA-15) and dopamine as raw materials. Experimental results were theoretically verified by first-principles calculation. The obtained m-Si/C composites exhibited a high...
In order to improve the thermal stability of the LiNi0.5Co0.2Mn0.3 cathode material, the co-modified Li2O-2B2O3-(LiNi0.5Co0.2Mn0.3)0.98Zr0.02O2 (LBO-NCMZ) is prepared. The XRD, SEM, and Raman show a better layered structure and spherical shape after charging and discharging at high temperature compared with the pristine material. The DSC results sh...
LiNi0.8Co0.1Mn0.1O2 (NCM) will have higher energy density at high voltage, but severe electrochemical polarization and capacity decay are likely to occur because of structural degradation. In this paper, LiTa2PO8 is used as a coating layer to modify the NCM. Covered with a 2–4 nm coating layer, the material structure does not change significantly,...
In order to enhance the electrochemical performance of LiNi0.5Co0.2Mn0.3O2 (NCM), an in situ doping with zirconium (Zr) by wet grind-solid state method then coating with Li2O-2B2O3 (LBO) by crystal phase selection method is successfully developed. At the same time, based on the density functional theory (DFT) with the generalized gradient approxima...
The electrochemical performances and thermostability of LiNi0.8Co0.1Mn0.1O2 is affected by temperature. High ambient temperature or irregular heat distribution accelerates the decline of LiNi0.8Co0.1Mn0.1O2 performance, shortens cathode material life. In this work, the energy storage and thermostability of the Li3VO4-coated LiNi0.8Co0.1Mn0.1O2 cath...
To improve the electrochemical performance of Nickel-rich cathode material LiNi0.8Co0.1Mn0.1O2, an in situ coating technique with Li2ZrO3 is successfully applied through wet chemical method, and the thermoelectrochemical properties of the coated material at different ambient temperatures and charge-discharge rates are investigated by electrochemica...
Silicon-based anode materials which are used as electrodes suffer from a short lifespan and unsatisfactory rate capability because of their large volume changes during lithiation/delithiation processes. In this work, we have designed carbon-encapsulated silicon (Si@C) nanocomposites in a yolk–shell-structural anode material for lithium-ion batterie...
A polyaniline (PANI)-coated LiNi0.8Co0.1Mn0.1O2 cathode material has been synthesized by a solution method to avoid lithium discharge and structural damage to the coating of active materials. The results of x-ray diffraction, Fourier-transform infrared spectroscopy, and transmission electron microscopy illustrate that PANI has been successfully coa...
(Ni0.8Mn0.1Co0.1)(OH)2 and Co(OH)2 secondly treated by LiNi0.8Mn0.1Co0.1O2 have been prepared via co-precipitation and high-temperature solid-state reaction. The residual lithium contents, XRD Rietveld refinement, XPS, TG-DSC, and electrochemical measurements are carried out. After secondly treating process, residual lithium contents decrease drast...
The LiNi0.8Co0.1Mn0.1O2 with LiAlO2 coating was obtained by hydrolysis–hydrothermal method. The morphology of the composite was characterized by SEM, TEM, and EDS. The results showed that the LiAlO2 layer was almost completely covered on the surface of particle, and the thickness of coating was about 8–12 nm. The LiAlO2 coating suppressed side reac...
Structural stability and high ionic and electronic conductivity are crucial for the performance of Li-ion batteries. To improve the electrochemical performance of Li-rich Mn-based cathode material, we have adopted a combination of bulk doping and surface coating rather than a single modification, thereby enhancing structural stability and conductiv...
Nickel-rich layered oxide cathode materials for advanced lithium-ion batteries have received much attention recently because of their high specific capacities and significant reduction of cost. However, these cathodes are facing a fundamental challenge of loss in performance as a result of surface lithium residue, side reactions with the electrolyt...
To improve the stability of LiVPO4F electrode/electrolyte interface, Li3PO4 is used to modify LiVPO4F composite (P-LVPF) for the first time. Morphological characterization shows that LiVPO4F particles are wrapped by amorphous carbon and lithium ionic conductor Li3PO4 as the interlayer and outer layer, respectively. Compared to the pristine sample,...
Thermal issues of lithium ion batteries are key factors affecting the safety, operational performance, life, and cost of the battery. An electrochemical–thermal coupling model based on thermoelectrochemical basic data was established to investigate the thermal behavior of LiFePO4 lithium ion battery. In this paper, the finite element method was use...
The effects of various Al concentration and substitution sites (including Li layer and transition metal layer) on the structural and electrochemical properties of LiNi0.5Co0.2Mn0.3O2 (NMC) materials are systematically investigated. X-ray diffraction, X-ray photoelectron spectroscopy and electrochemical tests confirm that LiAlO2 phase appears in Li1...
Layered LiNi1/3Mn1/3Co1/3O2, LiNi1/2Mn1/2O2, 0.35Li2MnO3·0.65LiNi1/3Mn1/3Co1/3O2 and 0.4Li2MnO3·0.6LiNi1/2Mn1/2O2 cathode materials were investigated by experimental and computational methods. The Rietveld refinement showed that the X-ray diffraction patterns of LiNi1/3Mn1/3Co1/3O2 and LiNi1/2Mn1/2O2 were well fitted with a model based on a single...
In order to resolve the safety problem arising from the thermal effect impact for lithium ion cell, different cathode materials of lithium ion cell were studied by using electrochemical-calorimetric technique. The electrochemical and thermodynamic information of lithium ion cells during charge-discharge process was obtained, and a series of thermod...
Electrochemical–calorimetric measurements were adopted to investigate the thermal-electrochemical behaviors of LiMn2O4/Li CR2025 button cell during charge–discharge process with various rates at 313.15 K. The results showed that the polarization and irreversibility of LiMn2O4 cell would be aggravated with the increasing of charge–discharge rate. X-...
Electrochemical-calorimetric measurements were employed in this study to disclose the thermo-electrochemical behaviors of LiMn2O4 lithium-ion cells during charge-discharge process at various charge-discharge rates. The results showed that the specific capacity and the amount of heat were strongly affected by the charge-discharge rate. The specific...
Measurement and analysis of the heat effects by electrochemical calorimetry play an important role in lithium-ion cell safety. In order to disclose thermal behaviors of LiFePO4 used in lithium-ion cell, an eight-channel micro-calorimeter combined with battery test system were employed in this study. The results show that the specific capacity and t...
The heat effects of lithium-ion battery cathode could substantially affect the safety and attenuate lifetime of lithium-ion battery. In order to disclose the thermo-electrochemical behaviors of LiFePO 4 battery during charge-discharge process at various rates at 30℃, electrochemical-calorimetric measurements were employed in this study. The results...
Purpose – The purpose of this paper is to consider the use and application of the “wire-beam electrode” method to evaluate the effectiveness of corrosion inhibitors used in concrete. Design/methodology/approach – The corrosion behavior of reinforcing bars in concrete was studied by simulating the 4×4 wire-beam electrode array. Different inhibitors,...
Purpose
The purpose of this paper is to consider the use and application of the “grey system” modelling methodology for the prediction and characterisation of inert anodes used in the aluminium electrolysis industry.
Design/methodology/approach
Cermet was very interesting potential material for developing inert anodes, which was composed of cerami...