中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Atomic-scale investigation on lithium storage mechanism in TiNb2O7

文献类型:期刊论文

作者Lu, X ; Jian, ZL ; Fang, Z ; Gu, L ; Hu, YS ; Chen, W ; Wang, ZX ; Chen, LQ
刊名ENERGY & ENVIRONMENTAL SCIENCE
出版日期2011
卷号4期号:8页码:2638
关键词AUGMENTED-WAVE METHOD ELECTRONIC-STRUCTURE ION BATTERIES ENERGY OXIDE INTERCALATION INSERTION CAPACITY SYSTEMS METALS
ISSN号1754-5692
通讯作者Lu, X: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要Titanium niobium oxide (TiNb2O7) with a monoclinic layered structure has been synthesized by a solid state reaction method as an anode candidate for Li-ion batteries. The TiNb2O7 electrode shows a lithium storage capacity of 281 mAh g(-1) with an initial coulombic efficiency as high as 93% at a current density of 30mA g(-1) (ca. 0.1C). The average lithium insertion voltage is about 1.64 V vs. Li/Li+ at a voltage range of 0.8-3.0 V. The electrodes exhibit small voltage hysteresis (c. a. 0.1 V at 30 mA g(-1)) and good capacity retention. Such superior electrochemical performance of TiNb2O7 makes it one of the most promising anode materials to replace spinel Li4Ti5O12 for applications in hybrid vehicles and large scale stationary Li-ion batteries. In addition, we demonstrate crystal structures of TiNb2O7 and lithiated TiNb2O7 using advanced spherical-aberration-corrected scanning transmission electron microscopy (STEM), to picture the lattice sites occupied by the Li, Ti, Nb and O atoms at atomic-scale. Possible lithiation/delithiation processes and reaction mechanisms are revealed in consistence with first-principles prediction.
收录类别SCI
资助信息Chinese Academy of Sciences [KJCX2-YW-W26]; "863" Project [2009AA033101]; "973" Projects [2007CB936500, 2009CB220104, 2010CB833102]; NSFC [50972164]
语种英语
公开日期2013-09-17
源URL[http://ir.iphy.ac.cn/handle/311004/34051]  
专题物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式
GB/T 7714
Lu, X,Jian, ZL,Fang, Z,et al. Atomic-scale investigation on lithium storage mechanism in TiNb2O7[J]. ENERGY & ENVIRONMENTAL SCIENCE,2011,4(8):2638.
APA Lu, X.,Jian, ZL.,Fang, Z.,Gu, L.,Hu, YS.,...&Chen, LQ.(2011).Atomic-scale investigation on lithium storage mechanism in TiNb2O7.ENERGY & ENVIRONMENTAL SCIENCE,4(8),2638.
MLA Lu, X,et al."Atomic-scale investigation on lithium storage mechanism in TiNb2O7".ENERGY & ENVIRONMENTAL SCIENCE 4.8(2011):2638.

入库方式: OAI收割

来源:物理研究所

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