超级电容器活性炭／MnO<sub>2</sub>复合电极材料的制备及性能

doi:10.11896/j.issn.1005-023X.2018.12.002

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Abstract KMnO₄ reacted with MnCl₂ while doped different activated carbon in reaction kettle at 140 ℃ for 6 h, then compo-site electrode materials for supercapacitor were prepared after ball mill. Specific surface area of 451 m²/g was obtained through BET mehtod for content of 29wt% activated carbon. XRD result revealed that MnO₂/activated carbon composite were hydrated and amorphous. Morphology of composite was tiny and surrounded micro-nanometer pompon globe by SEM. XPS spectrum showed composite existence of Mn⁴⁺ in oxide form. Specific capacitance of the electrode reached 365 F/g when scan rate was 50 mV/s, and charge-discharge efficiency was 93% as well as equivalent series resistance value of 0.87 Ω. Composite electrode appeared crystal phase with different degree after 3 000 cycles, meanwhile, morphology of the electrode turned into particles and block, and capacitance value of the electrode decayed to only approximate 6%.

Key words： activated carbon MnO₂ hydrothermal precipitation method specific capacitance cycle property

Published: 20 July 2018

CLC number:

TM53

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	Articles by authors
	LI Xiang
	ZHENG Feng
	LUO Yuan
	LUO Yongmei

Cite this article:

LI Xiang,ZHENG Feng,LUO Yuan, et al. Preparation of Activated Carbon/MnO₂ Composite Electrode Materials and Its Electrochemical Performance[J]. Materials Reports, 2018, 32(12): 1949-1954.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.12.002 OR http://www.mater-rep.com/EN/Y2018/V32/I12/1949

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