A novel high-performance cylindrical hybrid supercapacitor with Li4-xNaxTi5O12/activated carbon electrodes

被引：41
作者：
Lee, Seung-Hwan [1 ,2 ]
Kim, Hong-Ki [1 ]
Yun, Ye-Sol [1 ]
Yoon, Jung Rag [2 ]
Lee, Sung-Gap
Lee, Young-Hie [1 ]
机构：
[1] Kwangwoon Univ, Dept Elect Mat Engn, Seoul, South Korea
[2] Samwha Capacitor, R&D Ctr, Yongin, South Korea
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 29期
关键词：
Hybrid supercapacitor; Li4Ti5O12; Na doping; Cylindrical supercapacitor; Cycling behavior; LITHIUM-ION BATTERIES; ELECTROCHEMICAL PROPERTIES; ANODE MATERIALS; CATHODE MATERIALS; DOPED LI4TI5O12; SPINEL;
D O I：
10.1016/j.ijhydene.2014.05.072
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A cylindrical hybrid supercapacitor was fabricated using Li4-xNaxTi5O12 as an anode and activated carbon as a cathode. Li4-xNaxTi5O12 (0 <= x <= 0.6) powder was successfully crystallized, and the grain size of Li4-xNaxTi5O12 decreased with increasing Na content. This indicated that Na can enhance the electrochemical performance due to smaller grain size and ionic conductivity. However, excessive Na content causes a distortion of the original Li4Ti5O12 structure during cycling. The hybrid supercapacitor with the Li3.7Na0.3Ti5O12 anode shows similar electrochemical performance to Li3.4Na0.6Ti5O12, and approximately 92% of the maximum cycle performance is retained, even after 5000 cycles at 2.5 Ag-1. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：16569 / 16575
页数：7
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