Electrochemical Characterization of Lithium Bis(heptafluoroisopropyl)tetrafluorophosphate with Properties of Chemical Materials

Ai Hong Guo; Feng  Yuan; Chun Na  Zhang; Wen Bo Su

doi:10.4028/www.scientific.net/AMR.700.11

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 700Electrochemical Characterization of Lithium...

Electrochemical Characterization of Lithium Bis(heptafluoroisopropyl)tetrafluorophosphate with Properties of Chemical Materials

Abstract:

Lithium-ion secondary cell has high energy density, stable and high working voltage, wide working temperature and long working term. It is a safe and clean energy resource without pollution. At present, Lithium Hexafluorophosphate is used as conducting electrolyte lithium salt in lithium-ion secondary batteries. But Lithium Hexafluorophosphate as conducting electrolyte lithium salt has some disadvantages such as hydrolysis and instability. Lithium Bis (heptafluoroisopropyl) t-etrafluorophosphate Li [(C₃F₇)₂PF₄] was received by simons process from diisopropylchlorophosphane in this paper. As electrolyte of Li ion secondary cell, Li [(C₃F₇)₂PF₄] had lower vapor pressure than LiPF₆ in the solvent in the same temperature, comparable conductivity and oxidation stability in the same concentration in room temperature. It was worth mentioning that Li [(C₃F₇)₂PF₄] has excellent stability towards hydrolysis. The synthesis process is safe and easily controlled.

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Advanced Materials Research (Volume 700)

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11-14

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.700.11

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Online since:

May 2013

Authors:

Ai Hong Guo, Feng Yuan, Chun Na Zhang, Wen Bo Su

Keywords:

Electrolyte, Lithium Ion Secondary Cell, Simons Process

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