Journal
CHINESE JOURNAL OF CHEMICAL PHYSICS
Volume 33, Issue 4, Pages 485-490Publisher
CHINESE PHYSICAL SOC
DOI: 10.1063/1674-0068/cjcp1906118
Keywords
Lithium-ion batteries; Cathode materials; Spinel lithium nickel manganese oxide; Surface modification; Cathode-electrolyte interphase
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Funding
- National Key RAMP
- D Program of China [2018YFB0905400]
- Fundamental Research Funds for the Central Universities [No.JZ2019HGBZ0140]
- National Natural Science Foundation of China [51577175, U1630106]
- China Postdoctoral Science Foundation [172731]
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In this work the surface of LiNi0.5Mn1.5O4(LMN) particles is modified by Mn(3)O(4)coating through a simple wet grinding method, the electronic conductivity is significantly improved from 1.53x10(-7)S/cm to 3.15x10(-5)S/cm after 2.6 wt% Mn(3)O(4)coating. The electrochemical test results indicate that Mn(3)O(4)coating dramatically enhances both rate performance and cycling capability (at 55 degrees C) of LNM. Among the samples, 2.6 wt% Mn3O4-coated LNM not only exhibits excellent rate capability (a large capacity of 108 mAh/g at 10 C rate) but also shows 78% capacity retention at 55 degrees C and 1 C rate after 100 cycles.
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