SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 39 ›› Issue (11): 247-254.DOI: 10.1016/j.cjche.2021.08.001

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Facile synthesis of spinel LiNi0.5Mn1.5O4 as 5.0 V-class high-voltage cathode materials for Li-ion batteries

Xueyi Guo1, Chenlin Yang1, Jinxiu Chen2,3, Qinghua Tian1, Hongmei Zhang4, Guoyong Huang1,2,3   

  1. 1 School of Metallurgy and Environment, Central South University, Changsha 410083, China;
    2 College of New Energy and Materials, China University of Petroleum-Beijing, Beijing 102249, China;
    3 State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum-Beijing, Beijing 102249, China;
    4 State Key Laboratory of Advanced Chemical Poer Sources, Guizhou Meiling Power Sources Co. Ltd., Zunyi 563003, China
  • Received:2021-03-20 Revised:2021-07-23 Online:2021-12-27 Published:2021-11-28
  • Contact: Guoyong Huang
  • Supported by:
    Project supported by the National Natural Science Foundation of China (52022109 and 51834008), Beijing Municipal Natural Science Foundation (2202047), Science Foundation of China University of Petroleum, Beijing (2462018YJRC041 and 2462020YXZZ016), and the Opening Project of State Key Laboratory of Advanced Chemical Power Sources (SKL-ACPS-C-20).

Facile synthesis of spinel LiNi0.5Mn1.5O4 as 5.0 V-class high-voltage cathode materials for Li-ion batteries

Xueyi Guo1, Chenlin Yang1, Jinxiu Chen2,3, Qinghua Tian1, Hongmei Zhang4, Guoyong Huang1,2,3   

  1. 1 School of Metallurgy and Environment, Central South University, Changsha 410083, China;
    2 College of New Energy and Materials, China University of Petroleum-Beijing, Beijing 102249, China;
    3 State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum-Beijing, Beijing 102249, China;
    4 State Key Laboratory of Advanced Chemical Poer Sources, Guizhou Meiling Power Sources Co. Ltd., Zunyi 563003, China
  • 通讯作者: Guoyong Huang
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (52022109 and 51834008), Beijing Municipal Natural Science Foundation (2202047), Science Foundation of China University of Petroleum, Beijing (2462018YJRC041 and 2462020YXZZ016), and the Opening Project of State Key Laboratory of Advanced Chemical Power Sources (SKL-ACPS-C-20).

Abstract: LiNi0.5Mn1.5O4 and LiMn2O4 with novel spinel morphology were synthesized by a hydrothermal and post-calcination process. The synthesized LiMn2O4 particles (5-10 μm) are uniform hexahedron, while the LiNi0.5Mn1.5O4 has spindle-like morphology with the long axis 10-15 μm, short axis 5-8 μm. Both LiMn2O4 and LiNi0.5Mn1.5O4 show high capacity when used as cathode materials for Li-ion batteries. In the voltage range of 2.5-5.5 V at room temperature, the LiNi0.5Mn1.5O4 has a high discharge capacity of 135.04 mA·h·g-1 at 20 mA·g-1, which is close to 147 mA·h·g-1 (theoretical capacity of LiNi0.5Mn1.5O4). The discharge capacity of LiMn2O4 is 131.08 mA·h·g-1 at 20 mA·g-1. Moreover, the LiNi0.5Mn1.5O4 shows a higher capacity retention (76%) compared to that of LiMn2O4 (61%) after 50 cycles. The morphology and structure of LiMn2O4 and LiNi0.5Mn1.5O4 are well kept even after cycling as demonstrated by SEM and XRD on cycled LiMn2O4 and LiNi0.5Mn1.5O4 electrodes.

Key words: LiMn2O4, LiNi0.5Mn1.5O4, Novel morphology, Li-ion battery, Electrochemistry, Preparation, Nanomaterials

摘要: LiNi0.5Mn1.5O4 and LiMn2O4 with novel spinel morphology were synthesized by a hydrothermal and post-calcination process. The synthesized LiMn2O4 particles (5-10 μm) are uniform hexahedron, while the LiNi0.5Mn1.5O4 has spindle-like morphology with the long axis 10-15 μm, short axis 5-8 μm. Both LiMn2O4 and LiNi0.5Mn1.5O4 show high capacity when used as cathode materials for Li-ion batteries. In the voltage range of 2.5-5.5 V at room temperature, the LiNi0.5Mn1.5O4 has a high discharge capacity of 135.04 mA·h·g-1 at 20 mA·g-1, which is close to 147 mA·h·g-1 (theoretical capacity of LiNi0.5Mn1.5O4). The discharge capacity of LiMn2O4 is 131.08 mA·h·g-1 at 20 mA·g-1. Moreover, the LiNi0.5Mn1.5O4 shows a higher capacity retention (76%) compared to that of LiMn2O4 (61%) after 50 cycles. The morphology and structure of LiMn2O4 and LiNi0.5Mn1.5O4 are well kept even after cycling as demonstrated by SEM and XRD on cycled LiMn2O4 and LiNi0.5Mn1.5O4 electrodes.

关键词: LiMn2O4, LiNi0.5Mn1.5O4, Novel morphology, Li-ion battery, Electrochemistry, Preparation, Nanomaterials