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Acta Physico-Chimica Sinica  2004, Vol. 20 Issue (04): 377-381    DOI: 10.3866/PKU.WHXB20040409
Article     
Chemical Diffusion Behaviors of Lithium-ion in the LiV3O8 Prepared by Wet Method Reaction
Liu En-Hui;Li Xin-Hai;Hou Zhao-Hui;He Ze-Qiang;Deng Ling-Feng
School of Metallurgical Science and Engineering, Central South University, Changsha 410083
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Abstract  LiV3O8 as a cathode material for lithium ion batteries was synthesized by solution reaction and low temperature calcinations technique with V2O5•nH2O hydro-gels and Li2CO3 as raw materials. The precursor and product were characterized by DTA-TG, XRD measurements. Electrochemical behavior of the LiV3O8 as a cathode material for rechargeable lithium-ion batteries was studied by galvanostatic charge-discharge measurement. The experiment showed that the active material LiV3O8 was of higher charge-discharge capacity and excellent cycling behavior. Lithium-ion chemical diffusion coefficient (DLi+) of the LiV3O8 electrode was determined by the potentiostatic intermittent titration technique (PITT).DLi+ values obtained were in the range of 10-8~10-10 cm2•s-1,depending on x-values in Li1+xV3O8.The activation energy of lithium-ion diffusion (Ea) obtained was in the range of 25~42 kJ•mol-1(x=0.18~2.5).

Key wordsLithium trivanadate      Wet method reaction      Diffusion      Activation energy       Lithium-ion battery     
Received: 06 October 2003      Published: 15 April 2004
Corresponding Authors: Liu En-Hui     E-mail: liuenhui99@sina.com.cn
Cite this article:

Liu En-Hui;Li Xin-Hai;Hou Zhao-Hui;He Ze-Qiang;Deng Ling-Feng. Chemical Diffusion Behaviors of Lithium-ion in the LiV3O8 Prepared by Wet Method Reaction. Acta Physico-Chimica Sinica, 2004, 20(04): 377-381.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20040409     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2004/V20/I04/377

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