title: Effect of Ni(2+) content on lithium/nickel disorder for Ni-rich cathode materials.
abstract: Li excess LiNi0.8Co0.1Mn0.1O2 was produced by sintering the Ni0.8Co0.1Mn0.1(OH)2 precursor with different amounts of a lithium source. X-ray photoelectron spectroscopy confirmed that a greater excess of Li(+) leads to an increase in the number of Ni(2+) ions. Interestingly, the level of Li(+)/Ni(2+) disordering decreases with an increase in Ni(2+) content determined by the I003/I104 ratio in the X-ray diffraction patterns. The electrochemical measurement shows that the cycling stability and rate capability improve with an increase in Ni(2+) content. After cycling, electrochemical impedance spectroscopy shows decreased charge transfer resistance, and the XRD patterns exhibit an increased I003/I104 ratio with an increase in Ni(2+) content, reflecting the decrease in the level of Li(+)/Ni(2+) disorder during cycling.
authors: †Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.|‡National Development Center of High Technology Green Materials, Beijing 100081, China.
authors: Feng
authors: F
authors: Wu
authors: †Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.
authors: Jun
authors: J
authors: Tian
authors: †Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.|‡National Development Center of High Technology Green Materials, Beijing 100081, China.
authors: Yuefeng
authors: Y
authors: Su
authors: †Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.|‡National Development Center of High Technology Green Materials, Beijing 100081, China.
authors: Jing
authors: J
authors: Wang
authors: †Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.|‡National Development Center of High Technology Green Materials, Beijing 100081, China.
authors: Cunzhong
authors: C
authors: Zhang
authors: †Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.|‡National Development Center of High Technology Green Materials, Beijing 100081, China.
authors: Liying
authors: L
authors: Bao
authors: †Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.
authors: Tao
authors: T
authors: He
authors: †Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.
authors: Jinghui
authors: J
authors: Li
authors: †Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.|‡National Development Center of High Technology Green Materials, Beijing 100081, China.
authors: Shi
authors: S
authors: Chen
keywords: cathode material; cation disorder; electrochemical properties; lithium-ion batteries; nickel-rich