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Citation: YANG Liu, QI Lia, WANG Hongyu. Properties of Activated Carbon/LiNi_0.5Mn_1.5O₄ Capacitors and Degradation Analysis of Activated Carbon Anode[J]. Chinese Journal of Applied Chemistry, ;2015, 32(11): 1327-1334. doi: 10.11944/j.issn.1000-0518.2015.11.150094 shu

Properties of Activated Carbon/LiNi_0.5Mn_1.5O₄ Capacitors and Degradation Analysis of Activated Carbon Anode

YANG Liu ^a,b ,
QI Lia ^a ,
WANG Hongyu ^a,c,,

1.
a Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
b University of Chinese Academy of Sciences, Beijing 100049, China;
3.
c Changzhou Institute of Energy Storage Materials and Devices, Changzhou, Jiangsu 213000, China

Corresponding author: WANG Hongyu,
Received Date: 12 March 2015
Available Online: 6 May 2015
Fund Project: 江苏省科技支撑计划(BE2013006-3)资助 (BE2013006-3)

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^-3A/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.
- LiNi_0.5Mn_1.5O₄,
- activated carbon,
- electrochemical capacitors,
- degradation
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Properties of Activated Carbon/LiNi_0.5Mn_1.5O₄ Capacitors and Degradation Analysis of Activated Carbon Anode