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题名: Fabrication of lithium titanate/graphene composites with high rate capability as electrode materials for hybrid electrochemical supercapacitors
作者: Xue, Rong1;  Yan, Jingwang1;  Jiang, Liang1;  Yi, Baolian1
关键词: Composite materials ;  Sol-gel growth ;  Electrochemical techniques ;  Electrochemical properties
刊名: MATERIALS CHEMISTRY AND PHYSICS
发表日期: 2015-06-15
DOI: 10.1016/j.matchemphys.2015.04.055
卷: 160, 页:375-382
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Materials Science, Multidisciplinary
研究领域[WOS]: Materials Science
英文摘要: A lithium titanate (Li4Ti5O12)/graphene composite (LTO/graphene) is fabricated with a one-pot sol-gel method. Graphite oxide is dispersed in an aqueous solution of lithium acetate and tetrabutyl titanate followed by heat treatment in H-2/Ar. The LTO/graphene composite with reduced aggregation and improved homogeneity is investigated as an anode material for electrochemical capacitors. Electron transport is improved by the conductive graphene network in the insulating Li4Ti5O12 particles. The charge transfer resistance at the particle/electrolyte interface is reduced from 83.1 Omega to 55.4 Omega. The specific capacity of LTO/graphene composite is 126 mAh g(-1) at 20C. The energy density and power density of a hybrid electrochemical supercapacitor with a LTO/graphene negative electrode and an activated carbon positive electrode are 120.8 Wh kg(-1) and 1.5 kW kg(-1), respectively, which is comparable to that of conventional electrochemical double layer capacitors (EDLCs). The LTO/graphene composite fabricated by the one-pot sol-gel method is a promising anode material for hybrid electrochemical supercapacitors. (C) 2015 Elsevier B.V. All rights reserved.
关键词[WOS]: REDUCED GRAPHENE OXIDE ;  ION BATTERIES ;  LI4TI5O12 ANODE ;  GRAPHITE ;  POLYANILINE ;  PERFORMANCE ;  REDUCTION ;  INSERTION ;  BEHAVIOR
语种: 英语
WOS记录号: WOS:000356210200048
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146317
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Xue, Rong,Yan, Jingwang,Jiang, Liang,et al. Fabrication of lithium titanate/graphene composites with high rate capability as electrode materials for hybrid electrochemical supercapacitors[J]. MATERIALS CHEMISTRY AND PHYSICS,2015,160:375-382.
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