中国物理B ›› 2022, Vol. 31 ›› Issue (1): 16104-016104.doi: 10.1088/1674-1056/ac1932

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Pressure dependence of the thermal stability in LiMn2O4

Yan Zeng(曾彦)1, Hao Liang(梁浩)2,‡, Shixue Guan(管诗雪)1, Junpu Wang(王俊普)1, Wenjia Liang(梁文嘉)1, Mengyang Huang(黄梦阳)1, and Fang Peng(彭放)1,†   

  1. 1 Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
    2 School of Science, Southwest University of Science and Technology, Mianyang 621010, China
  • 收稿日期:2021-05-30 修回日期:2021-07-20 接受日期:2021-07-30 出版日期:2021-12-03 发布日期:2021-12-18
  • 通讯作者: Fang Peng, Hao Liang E-mail:pengfang@scu.edu.cn;lianghao@swust.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 12074273) and the Doctoral Research Fund of Southwest University of Science and Technology (Grant No. 20zx7136).

Pressure dependence of the thermal stability in LiMn2O4

Yan Zeng(曾彦)1, Hao Liang(梁浩)2,‡, Shixue Guan(管诗雪)1, Junpu Wang(王俊普)1, Wenjia Liang(梁文嘉)1, Mengyang Huang(黄梦阳)1, and Fang Peng(彭放)1,†   

  1. 1 Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
    2 School of Science, Southwest University of Science and Technology, Mianyang 621010, China
  • Received:2021-05-30 Revised:2021-07-20 Accepted:2021-07-30 Online:2021-12-03 Published:2021-12-18
  • Contact: Fang Peng, Hao Liang E-mail:pengfang@scu.edu.cn;lianghao@swust.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 12074273) and the Doctoral Research Fund of Southwest University of Science and Technology (Grant No. 20zx7136).

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摘要： Structural stability in terms of the decomposition temperature in LiMn2O4 was systematically investigated by a series of high-temperature and high-pressure experiments. LiMn2O4 was found to have structural stability up to 5 GPa at room temperature. Under ambient pressure, the compound decomposed at 1300 ℃. The decomposition temperature decreased with increasing pressure, yielding more complex decomposed products. Below the decomposition temperature, the crystal structure of LiMn2O4 varied with pressure. The presented results in this study offer new insights into the thermal and pressure stability of LiMn2O4 materials as a cathode for lithium-ion batteries that can operate under extreme conditions. Therefore, these findings may serve as a useful guide for future work for improving lithium-ion batteries.

关键词: LiMn2O4, high pressure, x-ray diffractometer, decomposition reactions

Abstract: Structural stability in terms of the decomposition temperature in LiMn2O4 was systematically investigated by a series of high-temperature and high-pressure experiments. LiMn2O4 was found to have structural stability up to 5 GPa at room temperature. Under ambient pressure, the compound decomposed at 1300 ℃. The decomposition temperature decreased with increasing pressure, yielding more complex decomposed products. Below the decomposition temperature, the crystal structure of LiMn2O4 varied with pressure. The presented results in this study offer new insights into the thermal and pressure stability of LiMn2O4 materials as a cathode for lithium-ion batteries that can operate under extreme conditions. Therefore, these findings may serve as a useful guide for future work for improving lithium-ion batteries.

Key words: LiMn2O4, high pressure, x-ray diffractometer, decomposition reactions

中图分类号:  (X-ray diffraction)

  • 61.05.cp
82.30.Lp (Decomposition reactions (pyrolysis, dissociation, and fragmentation))