Nanoscale Surface Modification of Lithium-Rich Layered-Oxide Composite Cathodes for Suppressing Voltage Fade

Angewandte Chemie
Fenghua ZhengMeilin Liu

Abstract

Lithium-rich layered oxides are promising cathode materials for lithium-ion batteries and exhibit a high reversible capacity exceeding 250 mAh g(-1) . However, voltage fade is the major problem that needs to be overcome before they can find practical applications. Here, Li1.2 Mn0.54 Ni0.13 Co0.13 O2 (LLMO) oxides are subjected to nanoscale LiFePO4 (LFP) surface modification. The resulting materials combine the advantages of both bulk doping and surface coating as the LLMO crystal structure is stabilized through cationic doping, and the LLMO cathode materials are protected from corrosion induced by organic electrolytes. An LLMO cathode modified with 5 wt % LFP (LLMO-LFP5) demonstrated suppressed voltage fade and a discharge capacity of 282.8 mAh g(-1) at 0.1 C with a capacity retention of 98.1 % after 120 cycles. Moreover, the nanoscale LFP layers incorporated into the LLMO surfaces can effectively maintain the lithium-ion and charge transport channels, and the LLMO-LFP5 cathode demonstrated an excellent rate capacity.

References

Nov 20, 2001·Nature·J M Tarascon, M Armand
Mar 8, 2011·Journal of the American Chemical Society·Naoaki YabuuchiShinichi Komaba

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Citations

Nov 26, 2016·Nature Communications·Sangryun KimJang Wook Choi
Apr 26, 2017·Chemical Society Reviews·Wangda LiArumugam Manthiram
Mar 3, 2017·Chemistry : a European Journal·Qunwei Tang
Apr 29, 2016·Physical Chemistry Chemical Physics : PCCP·Jicheng ZhangXiangfeng Liu
Mar 22, 2016·Angewandte Chemie·Qunwei TangBenlin He
Sep 15, 2017·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Andrei KapylouJin Hwan Park
Jan 1, 2020·Cell Reports. Physical Science·Bao QiuYing Shirley Meng
Aug 7, 2019·ACS Applied Materials & Interfaces·Xiang DingChun-Hua Chen
Aug 28, 2018·ACS Applied Materials & Interfaces·Jun-Chao ZhengZhen-Jiang He
Sep 25, 2019·ACS Applied Materials & Interfaces·Yicheng ZhongZaiping Guo

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