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Methods for enhancing the capacity of electrode materials in low-temperature lithium-ion batteries

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Chinese Chemical Letters 2021年第3期32卷 973-982页

作者： Ying Na Xiaohong Sun Anran Fan Shu Cai chunming zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China School of Chemistry and Chemical Engineering State Key Laboratory of Hollow-fiber Membrane Materials and Membrane ProcessesTiangong UniversityTianjin 300387China

Lithium-ion batteries(LIBs)have evolved into the mainstream power source of ene rgy sto rage equipment by reason of their advantages such as high energy density,high power,long cycle life and less *** the expansion of their applications in deep-sea exploration,aerospace and military equipment,special working conditions have placed higher demands on the low-temperature performance of ***,at low temperatures,the severe polarization and inferior electrochemical activity of electrode materials cause the acute capacity fading upon cycling,which greatly hindered the further development of *** this review,we summarize the recent important progress of LIBs in low-temperature operations and introduce the key methods and the related action mechanisms for enhancing the capacity of the various cathode and anode *** aims to promote the development of high-performance electrode materials and broaden the application range of LIBs.

关键词： Lithium-ion batteries Low-temperature capacity Cathode materials Anode materials Optimizing methods

Recent progress in rate and cycling performance modifications of vanadium oxides cathode for lithium-ion batteries

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Journal of Energy Chemistry 2021年第8期30卷 343-363,I0008页

作者： Xi Zhang Xiaohong Sun Xin Li Xudong Hu Shu Cai chunming zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin University300072 TianjinChina Department of Chemistry&Biochemistry University of California93106 Santa BarbaraUnited States School of Chemistry and Chemical Engineering State Key Laboratory of Hollow-fiber Membrane Materials and Membrane ProcessesTiangong University300387 TianjinChina

The emergency of high-power electrical appliances has put forward higher requirements for the power density of lithium-ion *** oxides with large theoretical capacities and high operating voltages are considered as prospective alternatives for the cathode of a new generation of lithium-ion ***,the poor rate and cycling performance caused by the sluggish electrons/lithium transportation,irreversible phase changes,vanadium dissolution and large volume changes during the repeated lithium intercalation/deintercalation hinder their commercial *** optimizing routes have been carried out and extensively explored to address these *** V_(2)O_(5),VO_(2)(B),V_(6)O_(13),and V_(2)O_(3)as examples,this article reviewed their crystal structures and lithium storage ***,recent progress in modification methods for the electrochemical insufficiencies of vanadium oxides,including nanostructure,heterogeneous atom doping,composite and self-supported electrodes has been systematically summarized and finally,the challenges for the industrialization of vanadium oxide cathodes and their development opportunities are proposed.

关键词： Vanadium oxides Nanostructure Heteroatoms-doping Composite Self-supported Lithium-ion batteries

Carbon-doped surface unsaturated sulfur enriched CoS2@rGO aerogel pseudocapacitive anode and biomass-derived porous carbon cathode for advanced lithium-ion capacitors

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Frontiers of Chemical Science and Engineering 2021年第6期15卷 1500-1513页

作者： Yunpeng Shang Xiaohong Sun Zhe Chen Kunzhou Xiong Yunmei Zhou Shu Cai chunming zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin300072China School of Chemistry and Chemical Engineering State Key Laboratory of Hollow Fiber Membrane Materials and Membrane ProcessesTiangong UniversityTianjin300387China

As a hybrid energy storage device of lithium-ion batteries and supercapacitors,lithium-ion capacitors have the potential to meet the demanding needs of energy storage equipment with both high power and energy *** this work,to solve the obstacle to the application of lithium-ion capacitors,that is,the balancing problem of the electrodes kinetic and capacity,two electrodes are designed and adequately *** the anode,we introduced in situ carbon-doped and surface-enriched unsaturated sulfur into the graphene conductive network to prepare transition metal sulfides,which enhances the performance with a faster lithium-ion diffusion and dominant pseudocapacitive energy ***,the lithium-ion capacitors anode material delivers a remarkable capacity of 810 mAh·g^(−1) after 500 cycles at 1 A·g^(−1).On the other hand,the biomass-derived porous carbon as the cathode also displays a superior capacity of 114.2 mAh·g^(−1) at 0.1 A·g^(−1).Benefitting from the appropriate balance of kinetic and capacity between two electrodes,the lithium-ion capacitors exhibits superior electrochemical *** assembled lithium-ion capacitors demonstrate a high energy density of 132.9 Wh·kg^(−1) at the power density of 265 W·kg^(−1),and 50.0 Wh·kg^(−1) even at 26.5 kW·kg^(−1).After 10000 cycles at 1 A·g^(−1),lithium-ion capacitors still demonstrate the high energy density retention of 81.5%.

关键词： in-situ carbon-doped surface unsaturated sulfur enriched pseudocapacitive energy storage biomass-derived carbon lithium-ion capacitors

Fault Diagnosis Method of Rolling Bearing Based on MSCNN-LSTM

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Computers, Materials & Continua 2024年第6期79卷 4395-4411页

作者： chunming Wu Shupeng zheng Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of EducationNortheast Electric Power UniversityJilin132012China Ministry of Education Northeast Electric Power UniversityJilin132012China

Deep neural networks have been widely applied to bearing fault diagnosis systems and achieved impressive success *** address the problem that the insufficient fault feature extraction ability of traditional fault diagnosis methods results in poor diagnosis effect under variable load and noise interference scenarios,a rolling bearing fault diagnosis model combining Multi-Scale Convolutional Neural Network(MSCNN)and Long Short-Term Memory(LSTM)fused with attention mechanism is *** adaptively extract the essential spatial feature information of various sizes,the model creates a multi-scale feature extraction module using the convolutional neural network(CNN)learning *** learning capacity of LSTM for time information sequence is then used to extract the vibration signal’s temporal feature *** parallel large and small convolutional kernels teach the system spatial local *** gathers temporal global features to thoroughly and painstakingly mine the vibration signal’s characteristics,thus enhancing model ***,bearing fault diagnosis is accomplished by using the SoftMax *** experiment outcomes demonstrate that the model can derive fault properties entirely from the initial vibration *** can retain good diagnostic accuracy under variable load and noise interference and has strong generalization compared to other fault diagnosis models.

关键词： Bearing fault diagnosis convolutional neural network short-long-term memory network feature fusion

Dense ceramics with complex shape fabricated by 3D printing:A review

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Journal of Advanced Ceramics 2021年第2期10卷 195-218页

作者： Zhe Chen Xiaohong Sun Yunpeng Shang Kunzhou Xiong Zhongkai Xu Ruisong Guo Shu Cai chunming zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin300072China School of Chemistry and Chemical Engineering State Key Laboratory of Hollow-fiber Membrane Materials and Membrane ProcessesTiangong UniversityTianjin300387China

Three-dimensional(3D)printing technology is becoming a promising method for fabricating highly complex ceramics owing to the arbitrary design and the infinite combination of *** density is one of the main problems with 3D printed ceramics,but concentrated descriptions of making dense ceramics are *** review specifically introduces the principles of the four 3D printing technologies and focuses on the parameters of each technology that affect the densification of 3D printed ceramics,such as the performance of raw materials and the interaction between energy and *** technical challenges and suggestions about how to achieve higher ceramic density are presented *** goal of the presented work is to comprehend the roles of critical parameters in the subsequent 3D printing process to prepare dense ceramics that can meet the practical applications.

关键词： 3D printing dense ceramics particle characteristics process parameters

Novel fast lithium-ion conductor LiTa_(2)PO_(8)enhances the performance of poly(ethylene oxide)-based polymer electrolytes in all-solid-state lithium metal batteries

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Chinese Chemical Letters 2022年第8期33卷 4037-4042页

作者： Ying Na Zhe Chen Zhongkai Xu Qi An Xi Zhang Xiaohong Sun Shu Cai chunming zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China School of Chemistry and Chemical Engineering State Key Laboratory of Hollow-fiber Membrane Materials and Membrane ProcessesTiangong UniversityTianjin 300387China

At present,replacing the liquid electrolyte in a lithium metal battery with a solid electrolyte is considered to be one of the most powerful strategies to avoid potential safety *** solid electrolytes(CPEs)have excellent ionic conductivity and flexibility owing to the combination of functional inorganic materials and polymer solid electrolytes(SPEs).Nevertheless,the ionic conductivity of CPEs is still lower than those of commercial liquid electrolytes,so the development of high-performance CPEs has important practical ***,a novel fast lithium-ion conductor material LiTa_(2)PO_(8) was first filled into poly(ethylene oxide)(PEO)-based SPE,and the optimal ionic conductivity was achieved by filling different concentrations(the ionic conductivity is 4.61×10^(-4)S/cm with a filling content of 15 wt%at 60℃).The enhancement in ionic conductivity is due to the improvement of PEO chain movement and the promotion of LiTFSI dissociation by LiTa_(2)PO_(8).In addition,LiTa_(2)PO_(8) also takes the key in enhancing the mechanical strength and thermal stability of *** assembled LiFePO_(4) solid-state lithium metal battery displays better rate performance(the specific capacities are as high as 157.3,152,142.6,105 and 53.1 mAh/g under0.1,0.2,0.5,1 and 2 C at 60℃,respectively)and higher cycle performance(the capacity retention rate is86.5%after 200 cycles at 0.5 C and 60℃).This research demonstrates the feasibility of LiTa_(2)PO_(8) as a filler to improve the performance of CPEs,which may provide a fresh platform for developing more advanced solid-state electrolytes.

关键词： Composite solid electrolyte All-solid-state lithium metal battery LiTa_(2)PO_(8) Poly(ethylene oxide) Lewis acid

Improving cycling stability of Bi-encapsulated carbon fibers for lithium/sodium-ion batteries by Fe_(2)O_(3) pinning

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Chinese Chemical Letters 2021年第8期32卷 2459-2462页

作者： Tianyi Hou Anran Fan Xiaohong Sun Xi Zhang Zhongkai Xu Shu Cai chunming zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China School of Chemistry and Chemical Engineering State Key Laboratory of Hollow-Fiber Membrane Materials and Membrane ProcessesTiangong UniversityTianjin 300387China

Bi draws increasing attention as anode materials for lithium-ion batteries and sodium-ion batteries due to its unique layered crystal structure,which is in favor of achieving fast ionic diffusion kinetics during ***,the dramatic volume expansion upon lithiation/sodiation and an insufficient theoretical capacity of Bi greatly hinder its practical ***,we report the Fe_(2 )O_(3) nanoparticle-pinning Bi-encapsulated carbon fiber composites through the electrospinning *** introduction of Fe_(2 )O_(3) nanoparticles can prevent the growth and aggregation of Bi nanoparticles during synthetic and cycling processes,re s ***_(2)O_(3) with high specific capacity also contributes to the specific capacity of the ***,the as-prepared Bi-Fe_(2)O_(3)/carbon fiber composite exhibits outstanding long-term stability,which delivers reversible capacities 504 and 175 mAh/g after1000 cycles at 1 A/g for lithium-ion and sodium-ion batteries,respectively.

关键词： Bismuth Iron oxide Pinning effect Lithium-ion batteries Sodium-ion batteries

Simultaneous realization of high sulfur utilization and lithium dendrite-free via dual-effect kinetic regulation strategy toward lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第6期81卷 260-271,I0007页

作者： Xinqi Zhao Xiaohong Sun Ruisong Guo Song Wang Fuyun Li Tingting Li Wen Zhang chunming zheng Lingyun An Leichao Meng Xudong Hu Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Qinghai Provincial Key Laboratory of Nanomaterials and Technology School of Physics and Electronic Information EngineeringQinghai Minzu UniversityXining 810007QinghaiChina Department of Chemistry&Biochemistry University of CaliforniaSanta BarbaraCA 93106United States

With the high theoretical specific capacity and energy density,lithium-sulfur batteries(LSBs)have been intensively studied as promising candidates for energy storage ***,LSBs are largely hindered by inferior sulfur utilization and uncontrollable dendritic ***,a hierarchical functionalization strategy of stepwise catalytic-adsorption-conversion for sulfur species via the synergetic of the efficiently catalytic host cathode and light multifunctional interlayer has been proposed to concurrently address the issues arising on the dual sides of the *** multi-layer SnS_(2) micro-flowers embedded into the natural three-dimensional(3D)interconnected carbonized bacterial cellulose(CBC)nanofibers are fabricated as the sulfur host that provides numerous catalytic sites for the rapid catalytic conversion of sulfur ***,the distinctive CBC-based SnO_(2)-SnS_(2) heterostructure network accompanied high conductive carbon nanofibers as the multifunctional interlayer promotes the rapid anchoringdiffusion-conversion of lithium polysulfides,Li^(+)flux redistribution,and uniform Li *** equipped with our strategy exhibit a high reversible capacity of 1361.5 m A h g^(-1)at 0.2 C and superior cycling stability with an ultra-low capacity fading of 0.031%per cycle in 1000 cycles at 1.5 C and 0.046%at 3 C.A favorable specific capacity of 859.5 m A h g^(-1)at 0.3 C is achieved with a high sulfur mass loading of 5.2 mg cm^(-2),highlighting the potential of practical *** rational design in this work can provide a feasible solution for high-performance LSBs and promote the development of advanced energy storage devices.

关键词： Lithium-sulfur battery Catalytic sulfur host Multifunctional interlayer Polysulfides adsorbing-conversion Dendrite-free

MnS hollow microspheres combined with carbon nanotubes for enhanced performance sodium-ion battery anode

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Chinese Chemical Letters 2020年第5期31卷 1221-1225页

作者： Na Zhang Xin Li Tianyi Hou Jinze Guo Anran Fan Shibo Jin Xiaohong Sun Shu Cai chunming zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China State Key Laboratory of Hollow-fiber Membrane Materials and Membrane Processes School of Environmental and Chemical EngineeringTianjin Polytechnic UniversityTianjin 300387China

MnS as anode material for sodium-ion batteries(SIBs)has recently attracted great attention because of the high theoretical capacity,great natural abundance,and low ***,it suffers from inferior electrical conductivity and large volume expansion during the charge/discharge process,leading to tremendous damage of electrodes and subsequently fast capacity *** mitigate these issues,herein,a three-dimensional(3D)interlaced carbon nanotubes(CNTs)threaded into or between MnS hollow microspheres(hollow MnS/CNTs composite)has been designed and synthesized as an enhanced anode *** can effectively improve the electrical conductivity,buffer the volume change,and maintain the integrity of the electrode during the charging and discharging process based on the synergistic interaction and the integrative ***,when evaluated as anode for SIBs,the hollow MnS/CNTs electrode displays enhanced reve rsible capacity(275 mAh/g at 100 mA/g after 100 cycles),which is much better than that of pure MnS electrode(25 mAh/g at 100 mA/g after 100 cycles)prepared without the addition of *** increasing the current density to 500 mA/g,the hollow MnS/CNTs electrode still delivers a five times higher reversible capacity than that of the pure MnS *** rate performance of the hollow MnS/CNTs electrode is also superior to that of pure MnS electrode at various current densities from 50 mA/g to 1000 mA/g.

关键词： MnS CNTs Hollow microspheres Anode Sodium-ion battery