Modification of Li[Li0.13Ni0.2Mn0.47Co0.2]O2 cathode material by layered CeO2-C coating

被引：3
作者：
Kurilenko, K. A. [1 ]
Shlyakhtin, O. A. [1 ]
Petukhov, D. I. [1 ,2 ]
Garshev, A. V. [1 ,2 ]
Valeev, R. G. [3 ]
机构：
[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia
[2] Moscow MV Lomonosov State Univ, Dept Mat Sci, Moscow 119991, Russia
[3] Russian Acad Sci, Ural Branch, Udmurt Fed Res Ctr, UdmFRC, Izhevsk 426000, Russia
来源：
JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2019年 / 23卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
Li-ion batteries; Cathode materials; Coatings; Ceria; Pyrolytic carbon; ELECTROCHEMICAL PERFORMANCE; SURFACE MODIFICATION; LITHIUM-RICH; OXIDE; CARBON; LIMN1.5NI0.5O4; IMPROVEMENT; COMPOSITE; VOLTAGE; LICOO2;
D O I：
10.1007/s10008-018-4150-5
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Li[Li0.13Ni0.2Mn0.47Co0.2]O-2 (LLNMC) cathode materials coated with CeO2 and pyrolytic carbon have been obtained by the consecutive thermal decomposition of Ce(NO3)(3) and polystyrene at the surface of LLNMC powder. EDX analysis combined with transmission electron microscopy revealed the uniform coating of LLNMC grains with nanosized ceria particles. The XPS spectra of LLNMC coated with CeO2 and carbon indicated a considerable amount of -C=C- bonds in the carbonized polystyrene pyrolysis products. The layered CeO2-C coating promotes a decrease in the electrode polarization and the charge transfer resistance of LLNMC during cycling, thus promoting a better rate capability of the cathode material. A combined effect of the CeO2 and carbon coatings results in the increase of the electrochemical capacity of LLNMC to 220mAhg(-1) at C/10.
引用
收藏
页码：433 / 439
页数：7
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