Li_2MoO_3正极材料的制备及其电化学性能

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英文篇名：Preparation and electrochemical performance of Li_2MoO_3 cathode material 作者：滕锐 ; 毛贵才 ; 谢颖 英文作者：TENG Rui;MAO Gui-Cai;XIE Ying;School of Chemistry and Materials Science, Heilongjiang University; 关键词：Li_2MoO_3 ; 正极材料 ; 电化学性能 英文关键词：Li_2MoO_3;;cathode material;;electrochemical performance 中文刊名：黑龙江大学工程学报 英文刊名：Journal of Engineering of Heilongjiang University 机构：黑龙江大学化学化工与材料学院; 出版日期：2019-06-25 出版单位：黑龙江大学工程学报 年：2019 期：02 基金：国家自然科学基金资助项目(21773060) 语种：中文; 页：47-51 页数：5 CN：23-1566/T ISSN：2095-008X 分类号：TM912

摘要

锂离子电池正极材料的比容量是制约电池能量密度的瓶颈问题,开发具有高稳定性、比容量大且安全性能良好的正极材料是锂离子电池领域内的一个重要研究方向。采用添加了助溶剂的简单固相法,在H_2/Ar(5∶95v/v)条件下,成功地合成了一种具有较高理论容量的新型富锂材料(Li_2MoO_3)。电化学测试结果表明材料在0.1C的倍率条件下的首圈比容量为248.4 mAh/g,循环测试100圈以后容量保有率接近50%。
        The specific capacity of cathode material for lithium ion batteries is the bottleneck that limits the energy density of the battery. The development of cathode materials with high stability, high specific capacity and good safety is an important research direction in the field of lithium ion batteries. A new type of lithium rich material(Li_2MoO_3) with high theoretical capacity was successfully synthesized under H_2/Ar(5∶95 v/v) conditions by using a simple solid phase method with added co-solvent. Electrochemical test results showed that the specific capacity of the first cycle of the material was 248.4 mAh/g at 0.1 C rate, and the capacity retention after 100 cycles was nearly 50%.

引文

[1] Choi N S,Chen Z H,Freunberger S A,et al.Bruce Challenges facing lithium batteries and electrical double-layer capacitors [J].Angewandte Chemie International Edition,2012,51 (40):9994-10024.
    [2] Dunn B,Kamath H,Tarascon J M.Electrical energy storage for the grid:a battery of choices [J].Science,2011,334 (125):928-935.
    [3] Tsutomu O,Yoshinari M.Layered lithium insertion material of LiCo1/3Ni1/3Mn1/3O2 for lithium-ion batteries [J].Chemistry.Letters,2001,30 (26):642-643.
    [4] Yoshizawa H,Ohzuku T.An application of lithium cobalt nickel manganeseoxide to high-power and high-energy density lithium-ion batteries [J].Journal of Power Sources,2007,174 (125):813-817.
    [5] Liu S,Feng X,Wang X L,et al.Detouring potential decay by fast completion of cation mixing [J] Advanced Energy Materials,2018,8 (15):1-9.
    [6] Li D,He H Y,Wu X M,et al.Electrochemical behavior of submicron Li2MoO3 as anodes in lithium-ion batteries [J],Journal of Alloys and Compounds,2016,682 (12):759-765.
    [7] 姜明.XLi2MoO3(1-x)LiMo(1/3)Co(1/3)Ni(1/3)O2正极材料的制备和改性研究[D].哈尔滨:黑龙江大学,2017.