Study on different power and cycling performance of crystalline K xMnO 2·nH 2O as cathode material for supercapacitors in Li 2SO 4, Na 2SO 4, and K 2SO 4 aqueous electrolytes

Jie Shao; Xinyong Li; Qunting Qu; Yuping Wu

doi:10.1016/j.jpowsour.2012.09.046

Study on different power and cycling performance of crystalline K _xMnO ₂·nH ₂O as cathode material for supercapacitors in Li ₂SO ₄, Na ₂SO ₄, and K ₂SO ₄ aqueous electrolytes

Jie Shao, Xinyong Li, Qunting Qu, Yuping Wu

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

81 Scopus citations

Abstract

The charge/discharge, electrochemical impedance, cyclic voltammogram, and cycling behaviors of crystalline K _xMnO ₂·nH ₂O as cathode material for supercapacitors in Li ₂SO ₄, Na ₂SO ₄, and K ₂SO ₄ electrolytes were compared. The different power and cycling performance of K _xMnO ₂·nH ₂O during charge/discharge in the three electrolytes were elucidated by analyzing its composition and structure evolution. Compared with the Li ₂SO ₄ and Na ₂SO ₄ electrolytes, the highest ionic conductivity of K ₂SO ₄ electrolyte, the fastest charge-transfer process and slightest structural evolution of K _xMnO ₂·nH ₂O during charge/discharge in the K ₂SO ₄ electrolyte lead to a superior power and cycling behavior for supercapacitor application.

Original language	English
Pages (from-to)	56-61
Number of pages	6
Journal	Journal of Power Sources
Volume	223
DOIs	https://doi.org/10.1016/j.jpowsour.2012.09.046
State	Published - 1 Feb 2013
Externally published	Yes

Keywords

Cycling performance
Electrolytes
Manganese dioxide
Power
Supercapacitor

UN SDGs

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

Access to Document

10.1016/j.jpowsour.2012.09.046

Cite this

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title = "Study on different power and cycling performance of crystalline K xMnO 2·nH 2O as cathode material for supercapacitors in Li 2SO 4, Na 2SO 4, and K 2SO 4 aqueous electrolytes",

abstract = "The charge/discharge, electrochemical impedance, cyclic voltammogram, and cycling behaviors of crystalline K xMnO 2·nH 2O as cathode material for supercapacitors in Li 2SO 4, Na 2SO 4, and K 2SO 4 electrolytes were compared. The different power and cycling performance of K xMnO 2·nH 2O during charge/discharge in the three electrolytes were elucidated by analyzing its composition and structure evolution. Compared with the Li 2SO 4 and Na 2SO 4 electrolytes, the highest ionic conductivity of K 2SO 4 electrolyte, the fastest charge-transfer process and slightest structural evolution of K xMnO 2·nH 2O during charge/discharge in the K 2SO 4 electrolyte lead to a superior power and cycling behavior for supercapacitor application.",

keywords = "Cycling performance, Electrolytes, Manganese dioxide, Power, Supercapacitor",

author = "Jie Shao and Xinyong Li and Qunting Qu and Yuping Wu",

year = "2013",

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doi = "10.1016/j.jpowsour.2012.09.046",

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T1 - Study on different power and cycling performance of crystalline K xMnO 2·nH 2O as cathode material for supercapacitors in Li 2SO 4, Na 2SO 4, and K 2SO 4 aqueous electrolytes

AU - Shao, Jie

AU - Li, Xinyong

AU - Qu, Qunting

AU - Wu, Yuping

PY - 2013/2/1

Y1 - 2013/2/1

N2 - The charge/discharge, electrochemical impedance, cyclic voltammogram, and cycling behaviors of crystalline K xMnO 2·nH 2O as cathode material for supercapacitors in Li 2SO 4, Na 2SO 4, and K 2SO 4 electrolytes were compared. The different power and cycling performance of K xMnO 2·nH 2O during charge/discharge in the three electrolytes were elucidated by analyzing its composition and structure evolution. Compared with the Li 2SO 4 and Na 2SO 4 electrolytes, the highest ionic conductivity of K 2SO 4 electrolyte, the fastest charge-transfer process and slightest structural evolution of K xMnO 2·nH 2O during charge/discharge in the K 2SO 4 electrolyte lead to a superior power and cycling behavior for supercapacitor application.

AB - The charge/discharge, electrochemical impedance, cyclic voltammogram, and cycling behaviors of crystalline K xMnO 2·nH 2O as cathode material for supercapacitors in Li 2SO 4, Na 2SO 4, and K 2SO 4 electrolytes were compared. The different power and cycling performance of K xMnO 2·nH 2O during charge/discharge in the three electrolytes were elucidated by analyzing its composition and structure evolution. Compared with the Li 2SO 4 and Na 2SO 4 electrolytes, the highest ionic conductivity of K 2SO 4 electrolyte, the fastest charge-transfer process and slightest structural evolution of K xMnO 2·nH 2O during charge/discharge in the K 2SO 4 electrolyte lead to a superior power and cycling behavior for supercapacitor application.

KW - Cycling performance

KW - Electrolytes

KW - Manganese dioxide

KW - Power

KW - Supercapacitor

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