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Temperature-adjustable thermal battery electrolyte, and preparation method and application thereof

A thermal battery and electrolyte technology, applied in the field of electrochemistry, can solve the problems of high thermal activation temperature and high operating temperature of thermal batteries

Pending Publication Date: 2021-06-11
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a temperature-adjustable thermal battery electrolyte and its preparation method and application, and solve the problem of excessively high thermal activation temperature and operating temperature of the thermal battery in the prior art

Method used

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  • Temperature-adjustable thermal battery electrolyte, and preparation method and application thereof
  • Temperature-adjustable thermal battery electrolyte, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0026] Preparation of heat-activated battery organic electrolyte with adjustable temperature: LiDFOB is added to molten PVDF and mixed evenly, and cooled to obtain a LiDFOB / PVDF mixture with a concentration of 1mol / L; 9 times its mass of solvent NMP is added to the obtained mixture (N-methylpyrrolidone), the mixture was dissolved in NMP, and the resulting solution was poured into a square polytetrafluoroethylene mold, and then the mold was transferred to a vacuum oven at 80°C to remove NMP, and the electrolyte membrane was obtained by demolding, and finally the electrolyte The membrane is cut to size for the battery.

Embodiment 2

[0028] Preparation of temperature-adjustable heat-activated battery organic electrolyte: LiTFSi is added to molten PMMA and mixed uniformly to obtain a LiTFSi / PMMA mixture with a concentration of 1mol / l; acetone 9 times its mass is added to the obtained mixture, and the resulting solution Cast in a square polytetrafluoroethylene mold, then transfer the mold to a vacuum oven at 80°C to remove acetone, demould to obtain an electrolyte membrane, and finally cut the electrolyte membrane into a battery size.

Embodiment 3

[0030] Preparation of heat-activated battery organic electrolyte with adjustable temperature: add LiTFSi to molten PE and mix evenly, cool to prepare a LiTFSi / PE mixture with a concentration of 1mol / l for later use; heat the mixture to 200°C and keep it warm to make the mixture in a molten state , and then pour the mixture in the molten state into a square polytetrafluoroethylene mold, and press it with a pressure of 10 MPa to form it. After cooling, demould to obtain an electrolyte membrane, and finally cut the electrolyte membrane into the size of the battery.

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Abstract

The invention belongs to the field of electrochemistry, and particularly relates to a temperature-adjustable thermal battery electrolyte, and a preparation method and application thereof. The thermal battery electrolyte realizes activation of the thermal battery by utilizing phase change of a polymer or an organic matter. Before phase change, a mixed system composed of a metal salt and the polymer is a solid phase and has no ionic conductance, no ionic pathway exists in the battery, the battery cannot discharge, after phase change, the polymer or the organic matter is in a molten state, the metal salt is dissolved in the polymer or the organic matter to realize internal ionic conduction, and the battery is activated to realize normal discharge.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a thermal battery electrolyte with adjustable temperature, a preparation method and application thereof. Background technique [0002] Thermal (heat activated) batteries are an important reserve battery. When stored, the electrolyte is a non-conductive solid, and when used, the heating agent inside is ignited to melt the electrolyte into an ion conductor and be activated. Thermal batteries have high specific energy and specific power, long storage time, and can work normally in various harsh environments, so they can be used as power supplies in missiles, rockets and other fields, and in non-military equipment such as aircraft emergency power supplies , Underground high-temperature prospecting power supply is also widely used. [0003] However, the melting point of the eutectic salt composed of common halide salts is relatively high, so that the activation temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/36
CPCH01M6/36H01M2300/0091
Inventor 张鹏刘一铮赵金保
Owner XIAMEN UNIV
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