The effects of persulfate treatment on the electrochemical properties of Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 cathode 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]O ₂ cathode material

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

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

123 Citations (Scopus)

Abstract

Spherical Li[Li _0.2Mn _0.54Ni _0.13Co _0.13]O ₂ material was treated with persulfates Na ₂S ₂O ₈ or (NH ₄) ₂S ₂O ₈ to extract lithium to increase the coulombic efficiency of the first cycle. The two persulfates showed different effects. Na ₂S ₂O ₈ greatly improved the first cycle efficiency of the active material to nearly 100%. The rate performance was also increased to more than 200 mAh g ^-1 at 1C rate. The reason for the improved rate performance by the treatment of Na ₂S ₂O ₈ is 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 (NH ₄) ₂S ₂O ₈ deteriorated the electrochemical performance of the Li-rich compound due to the Li ⁺/H ⁺ exchange and the collapse of the layered structure. © 2012 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	108-113
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

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

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

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@article{95affce4533345c2bbd5c3fd4ab11743,

title = "The effects of persulfate treatment on the electrochemical properties of Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 cathode material",

abstract = "Spherical Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 material was treated with persulfates Na 2S 2O 8 or (NH 4) 2S 2O 8 to extract lithium to increase the coulombic efficiency of the first cycle. The two persulfates showed different effects. Na 2S 2O 8 greatly improved the first cycle efficiency of the active material to nearly 100%. The rate performance was also increased to more than 200 mAh g -1 at 1C rate. The reason for the improved rate performance by the treatment of Na 2S 2O 8 is 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 (NH 4) 2S 2O 8 deteriorated the electrochemical performance of the Li-rich compound due to the Li +/H + exchange and the collapse of the layered structure. {\textcopyright} 2012 Elsevier B.V. All rights reserved.",

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",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - The effects of persulfate treatment on the electrochemical properties of Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 cathode 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

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2013/1/1

Y1 - 2013/1/1

N2 - Spherical Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 material was treated with persulfates Na 2S 2O 8 or (NH 4) 2S 2O 8 to extract lithium to increase the coulombic efficiency of the first cycle. The two persulfates showed different effects. Na 2S 2O 8 greatly improved the first cycle efficiency of the active material to nearly 100%. The rate performance was also increased to more than 200 mAh g -1 at 1C rate. The reason for the improved rate performance by the treatment of Na 2S 2O 8 is 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 (NH 4) 2S 2O 8 deteriorated the electrochemical performance of the Li-rich compound due to the Li +/H + exchange and the collapse of the layered structure. © 2012 Elsevier B.V. All rights reserved.

AB - Spherical Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 material was treated with persulfates Na 2S 2O 8 or (NH 4) 2S 2O 8 to extract lithium to increase the coulombic efficiency of the first cycle. The two persulfates showed different effects. Na 2S 2O 8 greatly improved the first cycle efficiency of the active material to nearly 100%. The rate performance was also increased to more than 200 mAh g -1 at 1C rate. The reason for the improved rate performance by the treatment of Na 2S 2O 8 is 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 (NH 4) 2S 2O 8 deteriorated the electrochemical performance of the Li-rich compound due to the Li +/H + exchange and the collapse of the layered structure. © 2012 Elsevier B.V. All rights reserved.

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 - RGC 21 - Publication in refereed journal

SN - 0378-7753

VL - 221

SP - 108

EP - 113

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -