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

HFCAS OpenIR

	Surface modification with oxygen vacancy in Li-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries
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
	Bozhou Chen 1; Bangchuan Zhao1 ; Jiafeng Zhou 1; Zhitang Fang 1; Yanan Huang1 ; Xuebin Zhu1 ; Yuping Sun1
	2019
发表期刊	材料科学技术学报:英文版
ISSN	1005-0302
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.
其他摘要	A couple of layered Li-rich cathode materials Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2 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 292.3mAhg~(–1) and the capacity maintains 235mAhg~(–1) after 150 cycles (80.4% retention), whereas the corresponding capacity values are only 269.2 and 108.5mAhg~(–1) (40.3% retention) for the H-NCM sample. The S-NCM sample also shows the higher rate performance with discharge capacity of 118.3mAhg~(–1) even at a high rate of 10 C, superior to that (46.5 mAh 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.
关键词	Li-rich cathode oxide material Oxygen vacancy Solvothermal method Electrochemical performance
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:6531397
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/98498
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.University of Science and Technology of China, Hefei 3.High Magnetic Field Laboratory, Chinese Academy of Sciences, 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).