Syntheses and Application of All-lithium Salts of Heteropolyacid as Electrolyte of Lithium-ion Battery

Chemical Research in Chinese Universities ›› 2004, Vol. 20 ›› Issue (1): 77-80.

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Syntheses and Application of All-lithium Salts of Heteropolyacid as Electrolyte of Lithium-ion Battery

CHEN Ya-guang, WANG Cun-guo, ZHANG Xi-yan, XIE De-min, WANG Rong-shun

Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China

Received:2003-01-15 Online:2004-02-24 Published:2011-08-06
Supported by:
Supported by the National 9\55 Key Program Fund(No.97-642-16) and the National Natural Science Foundation of China(No.39970842).

Abstract

Abstract: The all-lithium salts of heteropoly acid Li_xXM₁₂O₄₀(HPA-Li)(X=P, Si; M=Mo, W) were obtained via ion exchange and characterized by means of IR and UV spectroscopies, TG and elemental analyses. The conductivity of the electrolytic solution consisting of Li₃PW₁₂O₄₀ and PC/DME mixing solvent(1/2.5, volume ratio) is up to 7.2×10^-2 S/cm, being higher than that of LiClO₄ as the electrolyte. The all-lithium salts were used as electrolytes in secondary lithium-ion batteries. The discharge capacity of the PAS/Li batteries with Li₃PW₁₂O₄₀ electrolyte solutions reaches to 148 (mA·h)/g and the cyclic life is up to 380 times, much better than those of commercialized products with LiClO₄ and LiAsF6 as electrolytes.

Key words: All-lithium salt, Heteropoly compound, Electrolyte, Lithium-ion secondary battery

CHEN Ya-guang, WANG Cun-guo, ZHANG Xi-yan, XIE De-min, WANG Rong-shun. Syntheses and Application of All-lithium Salts of Heteropolyacid as Electrolyte of Lithium-ion Battery[J]. Chemical Research in Chinese Universities, 2004, 20(1): 77-80.

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Syntheses and Application of All-lithium Salts of Heteropolyacid as Electrolyte of Lithium-ion Battery

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