Properties of Activated Carbon/LiNi0.5Mn1.5O4 Capacitors and Degradation Analysis of Activated Carbon Anode

doi:10.11944/j.issn.1000-0518.2015.11.150094

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (11): 1327-1334.DOI: 10.11944/j.issn.1000-0518.2015.11.150094

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Properties of Activated Carbon/LiNi_0.5Mn_1.5O₄Capacitors and Degradation Analysis of Activated Carbon Anode

YANG Liu^a^b,QI Li^a,WANG Hongyu^a^c^*()

^aChangchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
^bUniversity of Chinese Academy of Sciences,Beijing 100049,China
^cChangzhou Institute of Energy Storage Materials and Devices,Changzhou,Jiangsu 213000,China

Received:2015-03-12 Accepted:2015-06-25 Published:2015-11-02 Online:2015-11-02
Contact: WANG Hongyu
Supported by:
Supported by Science and Technology Support Plan of Jiangsu Province(No.BE2013006-3)

Abstract

Abstract:

In order to improve the working voltage of electrochemical capacitors, LiNi_0.5Mn_1.5O₄(LNMO) was employed as the positive electrode material and activated carbon(AC) was used as the negative electrode material for the asymmetric electrochemical capacitors and the optical conditions was explored. Enhancing the mass ratio of AC/LNMO and the voltage ranges could both increase the discharge capacity and energy density. At the AC/LNMO mass ratio of 4 and in the 0~3 V voltage range, 97.5% capacity retention was achieved after 700 cycles at current density of 1×10^-3 A/cm². Three-electrode system and electrochemical impedance spectroscopy were applied to explore the degradation of AC anode, and we also analyzed its influence in the AC/LNMO asymmetric capacitors.

Key words: LiNi_0.5Mn_1.5O₄, activated carbon, electrochemical capacitors, degradation

CLC Number:

YANG Liu, QI Li, WANG Hongyu. Properties of Activated Carbon/LiNi_0.5Mn_1.5O₄Capacitors and Degradation Analysis of Activated Carbon Anode[J]. Chinese Journal of Applied Chemistry, 2015, 32(11): 1327-1334.

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Properties of Activated Carbon/LiNi_0.5Mn_1.5O₄Capacitors and Degradation Analysis of Activated Carbon Anode

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