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Journal of Materials Science & Technology 2021年第29期88卷 250-257页

作者： Lishuang Fan Yu Zhang Hao Zhou Zhikun Guo Yujie Feng Naiqing Zhang State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyChina Academy of Fundamental and Interdisciplinary Sciences Harbin Institute of TechnologyHarbin150001China School of Energy Science and Engineering Harbin Institute of TechnologyHarbinChina

Graphene has been widely used to improve the electrochemical performance in rate and cycling stability for SnO_(2).However,the mechanism of the synergistic effect and the interfacial interaction between SnO_(2)and graphene are still not fully ***,we put forward a novel,cost effective strategy to construct hierarchical SnO_(2)nanoclusters anchored on the graphene sponges for lithium storage by in situ self *** result shows that the synergistic effect and interfacial interaction origin form the existence of strong oxygen bridges between SnO_(2)and graphene via the C-O-Sn *** is demonstrated for the first time that the interfacial interaction by C-O-Sn bonding plays a crucial role in the rate and cycling stability both experimentally and ***,the SnO_(2)@graphene sponges exhibit remarkable rate capability(a reversible capability of 1141,997,912,831,693,536,and 302 mA h g^(-1)at 0.2 C,0.5 C,1 C,2 C,5 C,10 C and 20 C,respectively)and cycling performance(after 625 cycles at 6 A g^(-1)with a capacity retention of 537 m A h g^(-1)).

关键词： SnO_(2) Graphene sponges C-O-Sn bond Pseudocapacitive contributions lithium ion battery

Porous core–shell CoMn_2O_4 microspheres as anode of lithium ion battery with excellent performances and their conversion reaction mechanism investigated by XAFS

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Journal of Energy Chemistry 2018年第6期27卷 1637-1643页

作者： Hang Su Yue-Feng Xu Shou-Yu Shen Jian-Oiang wang Jun-Tao Li Ling Huang Shi-Gang Sun College of Energy School of Energy Research Xiamen UniversityXiamen 361005FujianChina College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005FujianChina Shanghai Synchrotron Radiation Facility Chinese Academy of SciencesShanghai 201204China

Porous core-shell CoMn204 microspheres of ca. 3-5μm in diameter were synthesized and served as an-ode of lithium ion battery. Results demonstrate that the as-synthesized CoMn204 materials exhibit excel-lent electrochemical properties. The CoMn204 anode can deliver a large capacity of 1070 mAh g-1 in thefirst discharge, a reversible capacity of 500 mAh g^-1 after 100 cycles with a coulombic efficiency of 98.5% at a charge-discharge current density of 200 mA g^-l, and a specific capacity of 385 mAh g^-1 at a muchhigher charge-discharge current density of 1600mA g^-1. Synchrotron X-ray absorption fine structure（XAFS） techniques were applied to investigate the conversion reaction mechanism of the CoMn204 *** X-ray absorption near edge structure （XANES） spectra revealed that, in the first discharge-charge cy-cle, Co and Mn in CoMn204 were reduced to metallic Co and Mn when the electrode was discharged to0.01 V, while they were oxidized respectively to CoO and MnO when the electrode was charged to *** of both XANE5 and extended X-ray absorption fine structure （EXAFS） revealed that neithervalence evolution nor phase transition of the porous core-shell CoMn204 microspheres could happen inthe discharge plateau from 0.8 to 0.6V, which demonstrates the formation of solid electrolyte interface（SEI） on the anode.

关键词： lithium ion battery Porous core-shell CoMn2O4 anode Conversion reaction mechanism XAFS

First-principles study of interphase Ni_3Sn in Sn-Ni alloy for anode of lithium ion battery

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Chinese Physics B 2008年第9期17卷 3422-3427页

作者：侯贤华胡社军李伟善汝强余洪文黄钊文 School of Physics and Telecommunication Engineering South China Normal University Department of Mathematics and Physics Wuyi University Department of Chemistry South China Normal University

This paper investigates the mechanism of Li insertion into interphase Ni3Sn in Ni-Sn alloy for the anode of lithium ion battery by means of the first-principles plane-wave pseudopotential. Compared with other phases, it is found that the Ni3Sn has larger relative expansion ratio and lower electrochemical potential, with its specific plateaus voltage around 0.3 eV when lithium atoms are filled in all octahedral interstitial sites, and the relative expansion ratio increasing dramatically when the lithiated phase transits from octahedral interstitial sites to tetrahedral interstitial sites. So this phase is a devastating phase for whole alloy electrode materials.

关键词： Sn-Ni alloy first-principle electronic structure lithium ion battery

Urchin-like Co3O4 Nanostructure and Their Electrochemical Behavior in Rechargeable lithium ion battery

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Chinese Journal of Chemical Physics 2011年第3期24卷 343-347,I0004页

作者：李惠费广涛崔平金翼冯旭勇陈春华中国科学院合肥物质科学研究院固体物理研究所材料物理重点实验室安徽纳米材料与技术重点实验室合肥230031 南京Lithing能源技术有限公司南京211135 中国科学技术大学材料与科学工程系中国科学院材料能源转换重点实验室合肥230026

3D urchin-like Co3O4 have been successfully prepared by calcination of the urchin-like precursors, which were synthesized through a facile hydrothermal route. The morphology and structure of the 3D urchin-like Co3O4 have been characterized by field emission scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy, and X-ray powder diffraction. The as-synthesized Co3O4 products are of urchin-like structures with approximated 5-7 μm in diameter, and are composed of numerous nanoparticles chains with the particles diameter of about 15 nm. This kind of urchin-like Co3O4 exhibits superior energy storage properties with the high capacity of 1.369 Ah/g and its good cyclic stability shows great potential in the rechargeable Li-ion battery.

关键词： Co3O4 Urchin-like structure Hydrothermal lithium ion battery Discharge capacity

First-principle study on phase Al_(0.8)Ni_3Sn_(0.2) in Sn-Ni-Al alloy as anode for lithium ion battery

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Chinese Physics B 2010年第11期19卷 521-527页

作者：黄钊文胡社军侯贤华赵灵智汝强李伟善张志文 School of Physics and Telecommunication Engineering South China Normal University Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes South China Normal University

The mechanism of lithium intercalation/deintercalation for phase Al0.8Ni3Sn0.2 as anode material used in lithium ion battery was studied carefully based on the first-principle plane wave pseudo-potential method. The calculated results indicated that SnNi Al alloy had high theoretical capacity when used as anode material, however, there was high initial irreversible capacity loss because of the large volume expansion. Therefore the technological parameters during preparing the Sn-Ni-Al anode should be controlled strictly to make the content of Al0.8Ni3Sn0.2 phase as low as possible and to make the anode consist of promising Sn-Ni and AI-Ni phases. For comparison, an experiment based on magnetron sputtering was done. The result showed that the calculation is in good agreement with the experiment. We found that the first-principle investigation method is of far-reaching significance in synthesising new commercial anode materials with high capacity and good cycle performance.

关键词： Sn-Ni-Al alloy first-principle lithium ion battery

Effect of binary conductive additive mixtures on electrochemical performance of polyoxomolybdate as cathode material of lithium ion battery

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Journal of Central South University 2016年第10期23卷 2506-2512页

作者：李文良倪尔福李新海郭华军 School of Metallurgy and Environment Central South University Changsha 410083 China Highpower International Inc. Xinxia Road Pinghu Town Longgang District Shenzhen 518111 China

Binary carbon mixtures, carbon black ECP 600JD(ECP) combined with vapor grown carbon fiber(VGCF) or carbon nanotube(CNT), or graphene(Gr) in different mass ratios, are investigated as the conductive additives for the cathode material polyoxomolybadate Na_3[AlMo_6O_(24)H_6](NAM). Field emission scanning electron microscopy and energy dispersive X-ray spectroscopy show that the surfaces of NAM particles are covered homogeneously with the binary conductive additive mixtures except the combination of ECP and CNT. The optimum combination is the mixture of ECP and VGCF, which shows higher discharge capacity than the combinations of ECP and CNT or Gr. Initial discharge capacities of 364, 339, and 291 m A·h/g are obtained by the combination of ECP and VGCF in the mass ratios of 2:1, 1:1, and 1:2, respectively. The results of electrochemical impedance spectra and 4-pin probe measurements demonstrate that the combination of ECP and VGCF exhibits the highest electrical conductivity for the electrode.

关键词： lithium ion battery cathode Na3[AlMo6O24H6](NAM) conductive additive

Boosting of reversible capacity delivered at a low voltage below 0.5 V in mildly expanded graphitized needle coke anode for a high-energy lithium ion battery

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Journal of Energy Chemistry 2022年第11期31卷 100-110,I0004页

作者： Dong Sun Lu Zhao Zhihua Xiao Kai Zhao Rundan Lin Hongmei Song Xilu Zhang Xinlong Ma Chong Peng Xiaoqiao Huang Xingxun Li Jinsen Gao Chunming Xu State Key Laboratory of Heavy Oil Processing China University of PetroleumBejing 102249China Department of Instrument Science and Engineering School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Research Instituteof Petro China Fuel Oil Co. LtdBeijing100195China

The rate performance and cycle stability of graphitized needle coke(GNC)as anode are still limited by the sluggish kinetics and volume expansion during the Li ions intercalation and de-intercalation ***,the output of energy density for lithium ion batteries(LIBs)is directly affected by the delithiation capacity below 0.5 ***,the mildly expanded graphitized needle coke(MEGNC)with the enlarged interlayer spacing from 0.346 to 0.352 nm is obtained by the two-step mild oxidation intercalation *** voltage plateau of MEGNC anode below 0.5 V is obviously broadened as compared to the initial GNC anode,contributing to the enhancement of Li storage below the low voltage ***,the coin full cell and pouch full cell configured with MEGNC anode exhibit much enhanced Li storage ability,energy density and better cycling stability than those full cells configured with GNC and commercial graphite anodes,demonstrating the practical application value of *** superior anode behaviors of MEGNC including the increased effective capacity at low voltage and superior cyclic stability are mainly benefited from the enlarged interlayer spacing,which not only accelerates the Li ions diffusion rate,but also effectively alleviates the volume expansion and fragmentation during the Li ions intercalation *** addition,the above result is further confirmed by the density functional theory *** work provides an effective modification strategy for the NC-based graphite to enhance the delithiation capacity at a low voltage plateau,dedicated to improving the energy density and durability of LIBs.

关键词： Graphited needle coke Mildly expanded Interlayer spacing Low voltage platform lithium ion battery

NiCo-LDH/Ti3C2 MXene hybrid materials for lithium ion battery with high-rate capability and long cycle life

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Journal of Energy Chemistry 2020年第11期29卷 143-153页

作者： Rui Zhang Zhe Xue Jiaqian Qin Montree Sawangphnjk Xinyu Zhang Riping Liu State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004HebeiChina Research Unit of Advanced Materials for Energy Storage Metallurgy and Materials Science Research InstituteChulalongkorn UniversityBangkok 10330Thailand Centre of Excellence for Energy Storage Technology(CEST) Department of Chemical and Biomolecular EngineeringSchool of Energy Science and EngineeringVidyasirimedhi Institute of Science and TechnologyRayo ng 21210Thailand

Nickel/cobalt-layered double hydroxides(Ni Co-LDH) have been attracted increasing interest in the applications of anode materials for lithium ion battery(LIB), but the low cycle stability and rate performance are still limited its practice applications. To achieve high performance LIB, the surface-confined strategy has been applied to design and fabricate a new anode material of NiCo-LDH nanosheet anchored on the surface of Ti3C2 MXene(Ni Co-LDH/Ti3C2). The ultra-thin, bended and wrinkled α-phase crystal with an interlayer spacing of 8.1 ? can arrange on the conductive substrates Ti3C2 MXene directly, resulting in high electrolyte diffusion ability and low internal resistance. Furthermore, chemical bond interactions between the highly conductive Ti3C2 MXene and Ni Co-LDH nanosheets can greatly increase the ion and electron transport and reduce the volume expansion of NiCo-LDH during Li ion intercalation. As expected,the discharge capacity of 562 m Ah g-1 at 5.0 A g-1 for 800 cycles without degradation can be achieved,rate capability and cycle performance are better than that of NiCo-LDH(~100 mAh g-1). Furthermore, the density function theory(DFT) calculations were performed to demonstrate that Ni Co-LDH/Ti3C2 system can be used as a highly desirable and promising anode material for lithium ion battery.

关键词： MXene Ti3C2 NiCo-LDH lithium ion battery First-principles calculation

Facile synthesis of CoFe2O4 nanoparticles anchored on graphene sheets for enhanced performance of lithium ion battery

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Progress in Natural Science:Materials International 2016年第5期26卷 498-502页

作者： Wen Qi Pei Li Ying Wu Hong Zeng Liting Hou Chunjiang Kuang Pei Yao Shaoxiong Zhou Beijing Key Laboratory of Energy Nanomaterials Advance Technology & Materials Co. Ltd China Iron & steel Research Institute Group School of Materials Science and Engineering Tianjin University

Recently, metal oxides as high capacity anode materials had been investigated for lithium ion ***, the fast capacity fading upon cycling leaded poor durability, which hindered their application as higher energy density of lithium ion battery. In this paper, a nanostructured nanocomposite with graphene supported CoFe2O4nanoparticles（NPs） was prepared via simple hydrothermal reaction. The uniform CoFe2O4NPs were anchored on graphene sheets, which brought a good performance on cyclability. Combined with the optimization of graphene content, the anode delivered a better capacity retention of 944 m A h g-1over 50 cycles at current density of 100 m A g-1and the good reversible capacity as 990 m A h g-1when the rate returned from 5 A g-1to 0.1 A g-1after 60 cycles. The present work provided a desired structure for conversion anode materials or other electrode materials of large volume change.

关键词： Graphene-based anode Cobalt ferrites lithium ion battery

Carbon combustion synthesis of lithium cobalt oxide as cathode material for lithium ion battery

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Particuology 2008年第2期6卷 81-84页

作者： Yongle Gan Li Zhang Yanxuan Wen Fan Wang Haifeng Su School of Chemistry and Chemical Engineering Guangxi University Nanning 530004 China

lithium cobalt oxide （LiCoO2） was synthesized by carbon combustion synthesis （CCS） using carbon as fuel. X-ray diffraction （XRD） and scanning electron microscope （SEM） measurements showed that carbon combustion led to the formation of layered structure of LiCoO2 and the particle size could be controlled by carbon content. For the LiCoO2 sample prepared at 800℃ for 2 h, at molar ratio of C/Co = 0.5, the particle-size distribution fell in the narrow range of 3-5 μm. Electrochemical tests indicated this LiCoO2 sample delivered an initial discharge capacity of 148 mAh/g with capacity retention rate higher than 97% after 10 cycles.

关键词： lithium ion battery Cathode material lithium cobalt oxides Carbon combustion synthesis