Lithium thionyl chloride battery electrolyte and its making method
A technology of lithium thionyl chloride battery and thionyl chloride solution, which is applied to secondary batteries, secondary battery parts, non-aqueous electrolyte batteries, etc., and can solve problems such as potential safety hazards, explosion and leakage of lithium batteries
Inactive Publication Date: 2010-05-19
CHINA UNIV OF GEOSCIENCES (WUHAN)
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- Application Information
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Problems solved by technology
However, the metal lithium electrode with a large area has great potential safety hazards. When the battery is short-circuited or misused by the user, the lithium battery is extremely easy to explode and leak.
Method used
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Embodiment 1
[0038] The electrolytic solution is a 0.8 mol / L lithium tetrachloroaluminate solution in thionyl chloride, to which 0.8% (mass ratio) of triphenyl phosphate is added.
Embodiment 2
[0040] The electrolyte is a 0.8 mol / L lithium tetrachloroaluminate solution in thionyl chloride, to which 3% (mass ratio) of triphenyl phosphate is added.
Embodiment 3
[0042] The electrolytic solution is a 0.8 mol / L lithium tetrachloroaluminate solution in thionyl chloride, to which 7.5% (mass ratio) of triphenyl phosphate is added.
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The invention is concerned with electrolyte of lithium thionyl chloride cell and its preparation method. This method adds 0.5 to 17.2 percent of quality ratio to triphenyl phosphate in thionyl chloride solution in lithium tetrachloroaluminate and the mol ratio of thionyl chloride is 0.8mol / L, 1.2mol / L or 1.6mol / L. Distil thionyl chloride to collect fraction with 75.5 to 76.5 degree, mix the fraction with lithium tetrachloroaluminate to get thionyl chloride solution of lithium tetrachloroaluminate, add triphenyl phosphate into the prepared solution, then add lithium slice into the solution andreflow at 80 degree until the solution change into colorless solution or tiny yellow. The cell using this lithium thionyl chloride cell can enhance load pressure and improve low temperature capability, and the load pressure can increase 0,05 to 0.3 V.
Description
technical field [0001] The invention relates to an electrolyte solution for a lithium thionyl chloride battery and a preparation method thereof. Background technique [0002] With the rapid development of portable electronic devices, higher and higher electrical performance technical requirements are put forward for the high energy density batteries used in them. Lithium thionyl chloride battery with 600Wh·Kg -1 High specific energy, long storage life of more than 10 years, low annual self-discharge rate of less than 1% and other electrochemical performance characteristics, have been widely used in various fields. [0003] However, when the lithium thionyl chloride battery is discharged at a large current, the load voltage drops rapidly, even lower than 3V, which cannot meet the working voltage requirements of some electrical appliances. At the same time, the active material utilization rate of the lithium thionyl chloride battery decreases. resulting in a lower actual spe...
Claims
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IPC IPC(8): H01M10/40H01M10/02H01M6/14H01M6/16H01M6/02H01M10/056H01M10/0567
CPCY02E60/122Y02E60/10
Inventor 王圣平华萍吴金平皮振邦
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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