The Synthesis and Electrochemical Property of Spinel Cathode Material Li-1.05[(Mn(1.9)9Gd(0.01))(0.91)(Mn1.8Co0.2)(0.09)]O-4 for Lithium Ion Batteries
文献类型： 外文期刊
作者： Sun, Xiaojie 1 ; Hu, Xiaohong 2 ; Tan, Jie 1 ; Tan, Xiaojie 4 ; Yu, Qian 4 ; Li, Zhaoxin 1 ; Zhai, Yuxiu 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
2.Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Hubei, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266000, Peoples R China
4.Qingdao Univ, Affiliated Hosp, Qingdao 266000, Peoples R China
关键词： Lithium-ion battery; Cathode material; Spinel; Solid-state reaction
期刊名称：INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE （ 影响因子：1.765； 五年影响因子：1.685 ）
ISSN： 1452-3981
年卷期： 2018 年 13 卷 3 期
页码：
收录情况： SCI
摘要： Novel spinel Li-1.05[(Mn1.99Gd0.01)(0.91)(Mn1.8Co0.2)(0.09)]O-4 as cathode material for Li -ion battery was prepared through two-step solid-state reaction and treatment by Li-Mn-Co-O material on the surface of Li-1.05[Mn1.99Gd0.01]O-4 particles. The physical and electrochemical properties of the materials were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV) and charge-discharge test. The novel material showed improved electrochemical properties compared with the pristine LiMn2O4, especially at elevated temperature. The initial discharge capacity of the Li-1.05[(Mn1.99Gd0.01)(0.91)(Mn1.8Co0.2)(0.09)]O-4 was 128.0 mAh g(-1) with a fading rate of 0.041% per cycle at 25 degrees C. Moreover, the cycle ability was improved more evidently at 55 degrees C, the retentions ratio of capacity was up to 91% for the novel material after 100 cycles.
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