Surface modification with oxygen vacancy in Li-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries

	Surface modification with oxygen vacancy in Li-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries
	Bozhou Chen 1; Bangchuan Zhao 1; Jiafeng Zhou 1; Zhitang Fang 1; Yanan Huang 1; Xuebin Zhu 1; Yuping Sun 1
刊名	材料科学技术学报:英文版
	2019
卷号	035
关键词	Li-rich cathode oxide material Oxygen vacancy Solvothermal method Electrochemical performance
ISSN号	1005-0302
其他题名	Surface modification with oxygen vacancy in Li-rich layered oxide Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2 for lithium-ion batteries
英文摘要	A couple of layered Li-rich cathode materials Li1.2Mn0.54Ni0.13Co0.13O2 without any carbon modification are successfully synthesized by solvothermal and hydrothermal methods followed by a calcination process. The sample synthesized by the solvothermal method(S-NCM) possesses more homogenous microstructure, lower cation mixing degree and more oxygen vacancies on the surface, compared to the sample prepared by the hydrothermal method(H-NCM). The S-NCM sample exhibits much better cycling performance, higher discharge capacity and more excellent rate performance than H-NCM. At 0.2 C rate,the S-NCM sample delivers a much higher initial discharge capacity of 292.3 mAh g^-1 and the capacity maintains 235 m Ah g^-1 after 150 cycles(80.4% retention), whereas the corresponding capacity values are only 269.2 and 108.5 m Ah g^-1(40.3% retention) for the H-NCM sample. The S-NCM sample also shows the higher rate performance with discharge capacity of 118.3 mAh g^-1 even at a high rate of 10 C, superior to that(46.5 m Ah g^-1) of the H-NCM sample. The superior electrochemical performance of the S-NCM sample can be ascribed to its well-ordered structure, much larger specific surface area and much more oxygen vacancies located on the surface.
语种	中文
CSCD记录号	CSCD:6531397
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/98497]
专题	中国科学院合肥物质科学研究院
作者单位	1.Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 2.High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 3.University of Science and Technology of China, Hefei
推荐引用方式 GB/T 7714	Bozhou Chen,Bangchuan Zhao,Jiafeng Zhou,et al. Surface modification with oxygen vacancy in Li-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries[J]. 材料科学技术学报:英文版,2019,035.
APA	Bozhou Chen.,Bangchuan Zhao.,Jiafeng Zhou.,Zhitang Fang.,Yanan Huang.,...&Yuping Sun.(2019).Surface modification with oxygen vacancy in Li-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries.材料科学技术学报:英文版,035.
MLA	Bozhou Chen,et al."Surface modification with oxygen vacancy in Li-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries".材料科学技术学报:英文版 035(2019).