The effects of persulfate treatment on the electrochemical properties of Li[Li0.2Mn0.54Ni0.13Co0.13]O2cathode material

Jun Zheng; Shengnan Deng; Zhicong Shi; Hongjie Xu; Hui Xu; Yuanfu Deng; Zachary Zhang; Guohua Chen

doi:10.1016/j.jpowsour.2012.06.084

The effects of persulfate treatment on the electrochemical properties of Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂cathode material

Jun Zheng, Shengnan Deng, Zhicong Shi, Hongjie Xu, Hui Xu, Yuanfu Deng, Zachary Zhang, Guohua Chen

Research output: Journal article publication › Journal article › Academic research › peer-review

117 Citations (Scopus)

Abstract

Spherical Li[Li0.2Mn0.54Ni0.13Co0.13]O2material was treated with persulfates Na2S2O8or (NH4)2S2O8to extract lithium to increase the coulombic efficiency of the first cycle. The two persulfates showed different effects. Na2S2O8greatly improved the first cycle efficiency of the active material to nearly 100%. The rate performance was also increased to more than 200 mAh g-1at 1C rate. The reason for the improved rate performance by the treatment of Na2S2O8is attributed to the formation of spinel phase on the surface of the material and the extraction of lithium and oxygen, which results in a decreased electrochemical resistance, whereas the treatment with (NH4)2S2O8deteriorated the electrochemical performance of the Li-rich compound due to the Li+/H+exchange and the collapse of the layered structure.

Original language	English
Pages (from-to)	108-113
Number of pages	6
Journal	Journal of Power Sources
Volume	221
DOIs	https://doi.org/10.1016/j.jpowsour.2012.06.084
Publication status	Published - 1 Jan 2013
Externally published	Yes

Keywords

Carbonate precipitate
Cathode materials
Lithium-rich compound
Persulfate treatment
Rate capability

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

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

More information

10.1016/j.jpowsour.2012.06.084

Cite this

@article{8e77dffca6734b5a8b21c660abca04f6,

title = "The effects of persulfate treatment on the electrochemical properties of Li[Li0.2Mn0.54Ni0.13Co0.13]O2cathode material",

abstract = "Spherical Li[Li0.2Mn0.54Ni0.13Co0.13]O2material was treated with persulfates Na2S2O8or (NH4)2S2O8to extract lithium to increase the coulombic efficiency of the first cycle. The two persulfates showed different effects. Na2S2O8greatly improved the first cycle efficiency of the active material to nearly 100%. The rate performance was also increased to more than 200 mAh g-1at 1C rate. The reason for the improved rate performance by the treatment of Na2S2O8is attributed to the formation of spinel phase on the surface of the material and the extraction of lithium and oxygen, which results in a decreased electrochemical resistance, whereas the treatment with (NH4)2S2O8deteriorated the electrochemical performance of the Li-rich compound due to the Li+/H+exchange and the collapse of the layered structure.",

keywords = "Carbonate precipitate, Cathode materials, Lithium-rich compound, Persulfate treatment, Rate capability",

author = "Jun Zheng and Shengnan Deng and Zhicong Shi and Hongjie Xu and Hui Xu and Yuanfu Deng and Zachary Zhang and Guohua Chen",

year = "2013",

month = jan,

day = "1",

doi = "10.1016/j.jpowsour.2012.06.084",

language = "English",

volume = "221",

pages = "108--113",

journal = "Journal of Power Sources",

issn = "0378-7753",

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TY - JOUR

T1 - The effects of persulfate treatment on the electrochemical properties of Li[Li0.2Mn0.54Ni0.13Co0.13]O2cathode material

AU - Zheng, Jun

AU - Deng, Shengnan

AU - Shi, Zhicong

AU - Xu, Hongjie

AU - Xu, Hui

AU - Deng, Yuanfu

AU - Zhang, Zachary

AU - Chen, Guohua

PY - 2013/1/1

Y1 - 2013/1/1

N2 - Spherical Li[Li0.2Mn0.54Ni0.13Co0.13]O2material was treated with persulfates Na2S2O8or (NH4)2S2O8to extract lithium to increase the coulombic efficiency of the first cycle. The two persulfates showed different effects. Na2S2O8greatly improved the first cycle efficiency of the active material to nearly 100%. The rate performance was also increased to more than 200 mAh g-1at 1C rate. The reason for the improved rate performance by the treatment of Na2S2O8is attributed to the formation of spinel phase on the surface of the material and the extraction of lithium and oxygen, which results in a decreased electrochemical resistance, whereas the treatment with (NH4)2S2O8deteriorated the electrochemical performance of the Li-rich compound due to the Li+/H+exchange and the collapse of the layered structure.

AB - Spherical Li[Li0.2Mn0.54Ni0.13Co0.13]O2material was treated with persulfates Na2S2O8or (NH4)2S2O8to extract lithium to increase the coulombic efficiency of the first cycle. The two persulfates showed different effects. Na2S2O8greatly improved the first cycle efficiency of the active material to nearly 100%. The rate performance was also increased to more than 200 mAh g-1at 1C rate. The reason for the improved rate performance by the treatment of Na2S2O8is attributed to the formation of spinel phase on the surface of the material and the extraction of lithium and oxygen, which results in a decreased electrochemical resistance, whereas the treatment with (NH4)2S2O8deteriorated the electrochemical performance of the Li-rich compound due to the Li+/H+exchange and the collapse of the layered structure.

KW - Carbonate precipitate

KW - Cathode materials

KW - Lithium-rich compound

KW - Persulfate treatment

KW - Rate capability

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U2 - 10.1016/j.jpowsour.2012.06.084

DO - 10.1016/j.jpowsour.2012.06.084

M3 - Journal article

SN - 0378-7753

VL - 221

SP - 108

EP - 113

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -