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Electrochemical Performance of Li1.2Mn0.54Co0.13Ni0.13O2 Cathode Materials Modified by NaH2PO2
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Jun CAO, Yifan QU, Zeheng YANG, Zhangxian CHEN, Weixin ZHANG
Journal of the Chinese Ceramic Society | 2021, 49(10) : 2144 - 2153
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Journal of the Chinese Ceramic Society | 2021, 49(10): 2144-2153
Electrochemical Performance of Li1.2Mn0.54Co0.13Ni0.13O2 Cathode Materials Modified by NaH2PO2
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Jun CAO, Yifan QU, Zeheng YANG, Zhangxian CHEN, Weixin ZHANG
Affiliations
  • School of Chemistry and Chemical Engineering, Hefei University of Technology, Anhui Key Laboratory Controllable Chemistry Reaction Material Chemical Engineering, Hefei 230009, China

    • CAO Jun (1996-), male, Master candidate. E-mail:

About Author:

CAO Jun (1996-), male, Master candidate. E-mail:

Published: 2021-10-20 doi: 10.14062/j.issn.0454-5648.20210119
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Different amounts of NaH2PO2 were used to treat lithium-rich cathode materials. The results show that the material treated by 4% (in mass fraction) NaH2PO2 exhibits an excellent cycle stability with 85.3% of capacity retention after 150 cycles at 0.5 C and a high Coulombic efficiency. The enhanced electrochemical performance is attributed to the two following aspects. One aspect is that NaH2PO2 pyrolysis produces reducing PH3 gas, which reacts with the active oxygen in the surface layer of the lithium-rich cathode materials to yield oxygen vacancy, thus effectively reducing the irreversible capacity loss in the first charge process. Another is that NaH2PO2 pyrolysis treatment induces Na+ doping, which can effectively stabilize the lattice structure and inhibit phase transition, and accelerate Li+ diffusion and reduce the electrochemical impedance. In addition, the formed Na4P2O7 coating can protect the electrode material and reduce the dissolution of the transition metal, thereby improving the cycle stability.

lithium-ion battery  /  lithium-rich cathode material  /  sodium hypophosphite
曹骏, 瞿翊帆, 杨则恒, 陈章贤, 张卫新. NaH2PO2改性Li1.2Ni0.13Co0.13Mn0.54O2富锂正极材料的电化学性能. 硅酸盐学报, 2021 , 49 (10) : 2144 -2153 . DOI: 10.14062/j.issn.0454-5648.20210119
Jun CAO, Yifan QU, Zeheng YANG, Zhangxian CHEN, Weixin ZHANG. Electrochemical Performance of Li1.2Mn0.54Co0.13Ni0.13O2 Cathode Materials Modified by NaH2PO2[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (10) : 2144 -2153 . DOI: 10.14062/j.issn.0454-5648.20210119
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Year 2021 volume 49 Issue 10
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Article Info
doi: 10.14062/j.issn.0454-5648.20210119
  • Receive Date：2021-02-22
  • Online Date：2026-10-30
  • Published：2021-10-20
Article Data
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History
  • Received：2021-02-22
  • Revised：2021-03-21
Funding
Affiliations
    School of Chemistry and Chemical Engineering, Hefei University of Technology, Anhui Key Laboratory Controllable Chemistry Reaction Material Chemical Engineering, Hefei 230009, China

Corresponding:

YANG Zeheng (1961-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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