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[1]潘冰冰,胡　朴,赵周桥,等.Li/Ti摩尔比对Li4Ti5O12负极材料组成、结构和电化学性能的影响[J].武汉工程大学学报,2021,43(03):283-287.[doi:10.19843/j.cnki.CN42-1779/TQ.202011008]
　PAN Bingbing,HU Pu,ZHAO Zhouqiao,et al.Effects of Li/Ti Molar Ratio on Composition，Structure and Electrochemical Properties of Li4Ti5O12 Anode Material[J].Journal of Wuhan Institute of Technology,2021,43(03):283-287.[doi:10.19843/j.cnki.CN42-1779/TQ.202011008]
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Li/Ti摩尔比对Li4Ti5O12负极材料组成、结构和电化学性能的影响(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
43
期数:
2021年03期
页码:
283-287
栏目:
材料科学与工程
出版日期:
2021-06-30

文章信息/Info

Title:
Effects of Li/Ti Molar Ratio on Composition，Structure and Electrochemical Properties of Li4Ti5O12 Anode Material
文章编号:
1674 - 2869（2021）03 - 0283 - 05
作者:
潘冰冰; 胡　朴; 赵周桥; 窦林涛; 邹义琪; 张占辉*
武汉工程大学材料科学与工程学院，湖北 武汉 430205
Author(s):
PAN Bingbing; HU Pu; ZHAO Zhouqiao; DOU Lintao; ZOU Yiqi; ZHANG Zhanhui*
School of Materials Science and Engineering，Wuhan Institute of Technology，Wuhan 430205， China
关键词:
锂离子电池; 钛酸锂; 锂钛摩尔比; 电化学性能
Keywords:
lithium-ion battery; Li4Ti5O12; Li/Ti molar ratio; electrochemical performance
分类号:
O646
DOI:
10.19843/j.cnki.CN42-1779/TQ.202011008
文献标志码:
A
摘要:
采用高温固相法制备不同锂钛摩尔比条件下的样品，探究锂钛摩尔比对钛酸锂的组成、结构和电化学性能的影响。通过X-射线衍射仪和扫描电子显微镜测定材料的组成、结构和形貌。结果表明：锂钛摩尔比在0.78~0.82之间可得到纯相的Li4Ti5O12；低锂钛摩尔比（0.74、0.76）存在TiO2杂相，其晶胞参数要高于Li4Ti5O12；然而高锂钛摩尔比（0.84~0.88）会产生Li2TiO3杂相。不同锂钛摩尔比（0.78~0.84）制备的样品形貌接近无明显差异，晶粒尺寸在1~6 μm之间。电学性能结果表明：锂钛摩尔比在0.78~0.84之间时，适量提高锂含量有助于提升材料的比容量，过量提高会使材料的循环稳定性和倍率性能变差。锂钛摩尔比为0.82得到的Li4Ti5O12比容量［198 （mA·h）/g，0.5C］、循环性能和倍率性能最优。
Abstract:
High temperature solid-state approach was used to prepare Li4Ti5O12 anode material. Influence of Li/Ti molar ratio on composition，structure and electrochemical performance was then investigated. The composition and morphology of the obtained material were determined by X-ray diffraction and scanning electron microscopy. The results showed that pure Li4Ti5O12 can be obtained when the Li/Ti molar ratios are in the range of 0.78-0.82. TiO2 impurity phase exists in the samples with low Li/Ti molar ratios （0.74，0.76），whose lattice parameters are higher than that of Li4Ti5O12. However，high Li/Ti molar ratios （0.84-0.88） lead to Li2TiO3 impurities. The morphologies of the samples with different Li/Ti molar ratios in the range of 0.78-0.84 are similar. The particle sizes of the sample are in the range of 1-6 μm. The electrochemical performance results indicated that when the Li/Ti molar ratios are in the range of 0.78-0.84，an appropriate amount of lithium content improves the specific capacity of the material，while an excessive amount of lithium content makes the cycling stability and multiplier performance of the material worse. Li4Ti5O12 with Li/Ti molar ratio of 0.82 displays the best specific capacity［198 （mA·h）/g，0.5C］，cycling stability and rate capability.

参考文献/References:

［1］　WU F X，WANG Z X，LI X H，et al. Preparation and characterization of spinel Li4Ti5O12 anode material from industrial titanyl sulfate solution ［J］. Journal of Alloys and Compounds，2011，509（3）：596-601. ［2］　谭毅，薛冰. 锂离子电池负极材料钛酸锂的研究进展［J］. 无机材料学报，2018，33（5）：475-482. ［3］　LIU J， SONG K P， VAN AKEN P A， et al. Self-supported Li4Ti5O12-C nanotube arraysas high-rate and long-life anode materials for flexible Li-ion batteries ［J］. Nano Letters，2014，14（5）：2597-2603. ［4］　GOCKELN M，POKHREL S，MEIERHOFER F，et al. Fabrication and performance of Li4Ti5O12/C Li-ion battery electrodes using combined double flame spray pyrolysis and pressure-based lamination technique ［J］. Journal of Power Sources，2018，374（15）：97-106. ［5］　冯余庆，谢兴华，张良杰，等. 钛酸锂负极材料的研究进展［J］. 广东化工，2019，46（2）：119-122. ［6］　于小林，吴显明，丁心雄，等. 两步煅烧法合成钛酸锂及其性能［J］. 材料科学与工程学报，2019，37（1）：72-75. ［7］　YUAN T， YU X， CAI R， et al. Synthesis of pristine and carbon-coated Li4Ti5O12 and their low-temperature electrochemical performance ［J］. Journal of Power Sources，2010，195（15）：4997-5004. ［8］　SUN L N，XIONG W，MI H W，et al. In situ coating of graphene-like sheets on Li4Ti5O12 particles for lithium-ion batteries ［J］. Electrochimica Acta，2017，230：508-513. ［9］　WANG R，CAO X Y，ZHAO D X，et al. Enhancing lithium storage performances of Li4Ti5O12 anode by introducing CuV2O6 phase ［J］. ACS Applied Materials & Interfaces，2020，12（35）：39170-39180. ［10］　ZHU G N，LIU H J，ZHUANG J H，et al. Carbon-coated nano-sized Li4Ti5O12 nanoporous micro-sphere as anode material for high-rate lithium-ion batteries ［J］. Energy & Environmental Science，2011，4（10）：4016-4022. ［11］　LONG W M， WANG X Y， YANG S Y， et al. Electrochemical properties of Li4Ti5-2xNixMnxO12 compounds synthesized by sol-gel process ［J］. Materials Chemistry and Physics，2011，131（1/2）：431-435. ［12］　管海英. 钛酸锂及其复合材料电化学性能研究［D］. 长沙：中南大学，2009. ［13］　YI T F， FANG Z K， DENG L， et al. Enhanced electrochemical performance of a novel Li4Ti5O12 composite as anode material for lithium-ion battery in a broad voltage window ［J］. Ceramics International，2015，41（2）：2336-2341. ［14］　LIU H D，ZHU Z Y，HUANG J，et al. Elucidating the limit of Li insertion into the spinel Li4Ti5O12 ［J］. ACS Materials Letters，2019，1（1）：96-102. ［15］　韩翠平. 纳米钛酸锂电极材料的制备、表面改性及脱嵌锂行为［M］. 北京：清华大学出版社，2018.

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备注/Memo

备注/Memo:
收稿日期：2020-11-03基金项目：武汉工程大学第十一届研究生教育创新基金（CX2019081）作者简介：潘冰冰，硕士研究生。E-mail：[email protected]*通讯作者：张占辉，博士，教授。E-mail：[email protected]引文格式：潘冰冰，胡朴，赵周桥，等. Li/Ti摩尔比对Li4Ti5O12负极材料组成、结构和电化学性能的影响［J］. 武汉工程大学学报，2021，43（3）：283-287.
更新日期/Last Update: 2021-06-28