Electrochemical performance of CrOx cathode material for high energy density lithium batteries

被引：6
作者：
Liu, Dongxu [1 ]
Mu, Xue [1 ]
Guo, Rui [2 ]
Xie, Jingying [2 ]
Yin, Geping [1 ]
Zuo, Pengjian [1 ]
机构：
[1] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers &, Harbin 150001, Heilongjiang, Peoples R China
[2] Shanghai Inst Space Power sources, State Key Lab Space Power Technol, Shanghai 200245, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2023年 / 18卷 / 02期
关键词：
Cathode material; High energy density; Lithium battery; CHROMIUM-OXIDE; CR8O21; CR2O5; STORAGE;
D O I：
10.1016/j.ijoes.2023.01.020
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Chromium oxides (Cr8O21 and Cr2O5) were synthesized by pyrolysis of CrO3 at different temperatures (325 degrees C, 350 degrees C and 375 degrees C) and employed as promising cathode materials in rechargeable lithium batteries. The material prepared at 325 degrees C with a heating rate of 5 degrees C /min in air for 2 h delivers the high specific capacity of 365 mAh/g and energy density of 1108 Wh/kg at a current density of 10 mA/g. Even at a high current density of 100 mA/g, the material shows the initial discharge capacity of 298 mAh/g and a relatively high capacity retention of 56.4% after 50 cycles. The LiCrO2 is formed during the first discharge process, and its reversibility during lithiation and delithiation process is verified by the structure and chromium valence evolution during cycling.
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收藏
页码：44 / 48
页数：5
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