期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 764, 期 -, 页码 44-50出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.06.020
关键词
Cathode material; Wet chemical method; LiNi0.8Co0.1Mn0.1O2; LaPO4 coating
资金
- National Natural Science Foundation of China [51502350, 51472272]
- China Postdoctoral Science Foundation [2016M592447]
- International Postdoctoral Exchange Fellowship Program of China [155212]
- Innovative Training Program of Central South University of China [201710533134]
- Hunan Province Science and Technology Plan Program of China [2014GK2010]
In order to enhance the electrochemical properties of nickel-rich LiNi0.8Co0.1Mn0.1O2 cathode material, lithium-ion conductor shell was coated on the surface of the material through a facile wet chemical route. The morphologies, structures and chemical compositions of the samples were characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, energy dispersive spectrometer and X-ray photoelectron spectroscopy. The result shows that the particle surface was uniformly coated by a very thin LaPO4 layer. Electrochemical measurements proved that the LaPO4 coated sample exhibited excellent cycling performance. The capacity retention of LaPO4-coated sample was 91.2% at 1 C after 100 cycles, which was higher compared with that of the pristine sample (76.4%). Moreover, the rate performance of the coated sample was greatly enhanced especially at 2, 5 and 10 C rate. The LaPO4-coated sample showed smaller charge transfer resistance and higher diffusion coefficient of lithium ions compared with those of the pristine sample. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据