High-rate nano-crystalline Li4Ti5O12 attached on carbon nano-fibers for hybrid supercapacitors

被引：288

作者：

Naoi, Katsuhiko ^{[1
]}

Ishimoto, Shuichi ^{[1
,2
]}

Isobe, Yusaku ^{[1
]}

Aoyagi, Shintaro ^{[1
]}

机构：

[1] Tokyo Univ Agr & Technol, Inst Symbiot Sci & Technol, Tokyo 1848558, Japan

[2] Nippon Chemicon Corp, Takahagi, Ibaraki 3188505, Japan

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 18期

关键词：

Hybrid supercapacitor; Lithium titanate; Nano-crystalline; Composite and ultra-centrifugal force; LITHIUM-ION; LI1.33TI1.67O4; INSERTION;

D O I：

10.1016/j.jpowsour.2009.12.104

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 lithium titanate (Li4Ti5O12)-based electrode which can operate at unusually high current density (300C) was developed as negative electrode for hybrid capacitors. The high-rate Li4Ti5O12 electrode has a unique nano-structure consisting of unusually small nano-crystalline Li4Ti5O12 (ca. 5-20 nm) grafted onto carbon nano-fiber anchors (nc-Li4Ti5O12/CNF). This nano-structured nc-Li4Ti5O12/CNE composite are prepared by simple sol-gel method under ultra-centrifugal force (65,000 N) followed by instantaneous annealing at 900 degrees C for 3 min. A model hybrid capacitor cell consisting of a negative nc-Li4Ti5O12/CNE composite electrode and a positive activated carbon electrode showed high energy density of 40 Wh L-1 and high power density of 7.5 kW L-1 comparable to conventional EDLCs. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：6250 / 6254

页数：5

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