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Electrolyte and galvanic cell using same

A technology of electrolyte and primary battery, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of energy density improvement, achieve the effect of increasing specific energy, increasing discharge specific energy, and stable working voltage

Pending Publication Date: 2022-05-27
厦门永力鑫新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the solid positive electrode material of fluorinated carbon primary battery itself has very high specific energy, because the specific energy of fluorinated carbon materials in practical batteries is close to its limit energy density, the energy density of traditional lithium fluorinated carbon batteries Further improvement encountered a bottleneck

Method used

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  • Electrolyte and galvanic cell using same
  • Electrolyte and galvanic cell using same
  • Electrolyte and galvanic cell using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Electrolytes containing vinyl sulfite (ES) and ethylene glycol (EG) were prepared in a room temperature glove box filled with argon. The various components whose mass ratio is LiTFSI:ES:EG:DME=10:30:5:55 are fully mixed to prepare a solution. Through the electrolyte density test, the measured electrolyte density was 1.08 g / mL, and the calculated lithium salt concentration in the electrolyte was 0.38 mol / L.

Embodiment 2

[0036] Electrolytes containing vinyl sulfite (ES) and 1,2-propanediol (1,2-PG) were prepared in a room temperature glove box filled with argon. The various components whose mass ratio is LiBOB:ES:(1,2-PG):DME=10:30:10:50 are fully mixed to prepare a solution. Through the electrolyte density test, the measured electrolyte density was 1.10 g / mL, and the calculated lithium salt concentration in the electrolyte was 0.57 mol / L.

Embodiment 3

[0038] In an argon-filled glove box at room temperature, an electrolyte solution containing dimethyl sulfite (DMS) and ethylene glycol (EG) was prepared. Convert mass ratio to LiBF 4 :DMS:EG:DME=10:15:12:63, and the various components were thoroughly mixed to form a solution. Through the electrolyte density test, the measured electrolyte density is 1.15g / ml, and the calculated lithium salt concentration in the electrolyte is 1.2mol / L.

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Abstract

The invention discloses an electrolyte and a primary battery using the same, the electrolyte comprises an organic solvent and an electrolyte salt, the organic solvent comprises a sulfite compound and dihydric alcohol, the concentration of the electrolyte salt in the electrolyte is 0.3-1.2 mol / L, the mass percentage content of the sulfite compound in the electrolyte is 10-80%, and the mass percentage content of the dihydric alcohol in the electrolyte is 10-80%. And the mass percentage of the dihydric alcohol in the electrolyte is 4-12%. According to the invention, the sulfite compound is used as an active substance for relay discharge in the electrolyte, and the dihydric alcohol is used as a catalyst, so that the polarization of the discharge reaction of the sulfite compound is reduced, and the discharge voltage platform of the sulfite compound is improved, thereby improving the discharge specific energy of the primary battery.

Description

technical field [0001] The invention belongs to the technical field of batteries, and particularly relates to an electrolyte and a galvanic battery using the same. Background technique [0002] With the development and popularization of electronic devices, lithium-ion batteries as their power sources have received extensive attention. At present, the energy density of commercial lithium-ion batteries can reach 350Wh / kg. But for some special consumer electronic equipment, aviation / aerospace, deep sea, and medical applications, it requires the power supply to have higher energy density and longer storage performance to meet the requirements of long-term continuous work and standby time. Compared with rechargeable lithium-ion batteries, primary batteries, especially lithium primary batteries, include Li-MnO 2 , Li-SO 2 , Li-SOCl 2 and Li-CF x Batteries with higher specific energy and energy density, and smaller self-discharge rates can better meet the requirements of these ...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/0568H01M10/0569
CPCH01M10/0568H01M10/0569H01M10/0525Y02E60/10
Inventor 李益孝张忠如王伟立杨勇
Owner 厦门永力鑫新能源科技有限公司
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