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A kind of high power density primary battery electrolyte and its preparation method and application

A high-power, electrolyte technology, applied in the field of electrochemistry, can solve problems such as affecting the power density of primary batteries, and achieve the effect of improving rate performance

Active Publication Date: 2021-10-08
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem that this type of electrolyte affects the power density of the primary battery is prominent

Method used

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  • A kind of high power density primary battery electrolyte and its preparation method and application
  • A kind of high power density primary battery electrolyte and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high power density primary battery electrolyte, including conductive lithium salt and diethylene glycol dimethyl ether solvent, the concentration of conductive lithium salt dissolved in diethylene glycol dimethyl ether solvent is 0.8mol / L.

[0030] The preparation method of the above-mentioned high power density primary battery electrolyte comprises the following steps:

[0031] (1) Diethylene glycol dimethyl ether solvent is purified to remove impurities and remove water to obtain a pure solvent;

[0032] (2) Dissolve the conductive lithium salt lithium tetrafluoroborate in the solvent obtained in step (1) at room temperature to a final concentration of 0.8 mol / L, and stir evenly to obtain a high power density primary battery electrolyte.

Embodiment 2

[0034] A high-power-density primary battery electrolyte, including a conductive lithium salt and a diethylene glycol dimethyl ether solvent, the concentration of the conductive lithium salt dissolved in the diethylene glycol dimethyl ether solvent is 0.9 mol / L.

[0035] The preparation method of the above-mentioned high power density primary battery electrolyte comprises the following steps:

[0036] (1) Diethylene glycol dimethyl ether solvent is purified to remove impurities and remove water to obtain a pure solvent;

[0037] (2) Dissolve the conductive lithium salt lithium hexafluorophosphate in the solvent obtained in step (1) at room temperature to a final concentration of 0.9 mol / L, and stir evenly to obtain a high power density primary battery electrolyte.

Embodiment 3

[0039] A high-power-density primary battery electrolyte, including a conductive lithium salt and a diethylene glycol dimethyl ether solvent, the concentration of the conductive lithium salt dissolved in the diethylene glycol dimethyl ether solvent is 0.95 mol / L.

[0040] The preparation method of the above-mentioned high power density primary battery electrolyte comprises the following steps:

[0041] (1) Diethylene glycol dimethyl ether solvent is purified to remove impurities and remove water to obtain a pure solvent;

[0042] (2) Dissolve the conductive lithium salt lithium difluorooxalate borate in the solvent obtained in step (1) at room temperature to a final concentration of 0.95 mol / L, and stir evenly to obtain a high power density primary battery electrolyte.

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Abstract

The invention discloses a high power density primary battery electrolyte and its preparation method and application, belonging to the field of electrochemistry, by dissolving conductive lithium salt in diethylene glycol dimethyl ether, using diethylene glycol dimethyl ether and Due to the strong binding force of lithium ions, DME and lithium ions are intercalated into CFx materials together to form chelated products of DME-Li-ion-F, thereby inhibiting the formation of LiF, a battery discharge product. Crystal, and then achieve the purpose of improving the rate performance of the battery. The composition of the electrolytic solution of the invention is simple, the operation is convenient and economical, and the power density of the primary battery can be significantly improved.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a high power density primary battery electrolyte, a preparation method and application thereof. Background technique [0002] As a high-energy chemical power source, lithium primary batteries are widely used in computer memory, computer motherboards, cardiac pacemakers, remote controls and other fields due to their advantages such as high specific energy, high working voltage, and long storage life. In the 1970s, lithium / carbon fluoride (Li / CF x ) battery was introduced into primary lithium battery for the first time, it is better than Li / MnO 2 , Li / SOCl 2 and Li / SO 2 The battery has higher specific energy, which is the highest theoretical specific energy among lithium primary batteries. However, Li / CF x One of the main limiting factors for the large-scale application of batteries is low power and poor low-temperature performance, which is different from that of CF x The low...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/16
CPCH01M6/164H01M6/166H01M2300/0028
Inventor 邢丽丹车艳霞李伟善袁中直许梦清廖友好
Owner SOUTH CHINA NORMAL UNIVERSITY