Effect of Ni2+ content on lithium/nickel disorder for Ni-rich cathode materials

Feng Wu; Jun Tian; Yuefeng Su; Jing Wang; Cunzhong Zhang; Liying Bao; Tao He; Jinghui Li; Shi Chen

doi:10.1021/acsami.5b00645

Effect of Ni²⁺ content on lithium/nickel disorder for Ni-rich cathode materials

Feng Wu, Jun Tian, Yuefeng Su^*, Jing Wang, Cunzhong Zhang, Liying Bao, Tao He, Jinghui Li, Shi Chen

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

318 Citations (Scopus)

Abstract

Li excess LiNi_0.8Co_0.1Mn_0.1O₂ was produced by sintering the Ni_0.8Co_0.1Mn_0.1(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 Ni²⁺ ions. Interestingly, the level of Li⁺/Ni²⁺ disordering decreases with an increase in Ni²⁺ 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 Ni²⁺ 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 Ni²⁺ content, reflecting the decrease in the level of Li⁺/Ni²⁺ disorder during cycling.

Original language	English
Pages (from-to)	7702-7708
Number of pages	7
Journal	ACS applied materials & interfaces
Volume	7
Issue number	14
DOIs	https://doi.org/10.1021/acsami.5b00645
Publication status	Published - 15 Apr 2015

Keywords

cathode material
cation disorder
electrochemical properties
lithium-ion batteries
nickel-rich

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsami.5b00645

Cite this

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title = "Effect of Ni2+ 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 Ni2+ ions. Interestingly, the level of Li+/Ni2+ disordering decreases with an increase in Ni2+ 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 Ni2+ 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 Ni2+ content, reflecting the decrease in the level of Li+/Ni2+ disorder during cycling.",

keywords = "cathode material, cation disorder, electrochemical properties, lithium-ion batteries, nickel-rich",

author = "Feng Wu and Jun Tian and Yuefeng Su and Jing Wang and Cunzhong Zhang and Liying Bao and Tao He and Jinghui Li and Shi Chen",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

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T1 - Effect of Ni2+ content on lithium/nickel disorder for Ni-rich cathode materials

AU - Wu, Feng

AU - Tian, Jun

AU - Su, Yuefeng

AU - Wang, Jing

AU - Zhang, Cunzhong

AU - Bao, Liying

AU - He, Tao

AU - Li, Jinghui

AU - Chen, Shi

PY - 2015/4/15

Y1 - 2015/4/15

N2 - 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 Ni2+ ions. Interestingly, the level of Li+/Ni2+ disordering decreases with an increase in Ni2+ 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 Ni2+ 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 Ni2+ content, reflecting the decrease in the level of Li+/Ni2+ disorder during cycling.

AB - 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 Ni2+ ions. Interestingly, the level of Li+/Ni2+ disordering decreases with an increase in Ni2+ 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 Ni2+ 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 Ni2+ content, reflecting the decrease in the level of Li+/Ni2+ disorder during cycling.

KW - cathode material

KW - cation disorder

KW - electrochemical properties

KW - lithium-ion batteries

KW - nickel-rich

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