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All-solid-state metal lithium battery and preparation method thereof

An all-solid-state, metal lithium technology, applied in the manufacture of electrolyte batteries, batteries, secondary batteries, etc., can solve problems such as hidden safety hazards and flammability of polymers

Active Publication Date: 2021-11-19
张火锐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a kind of all-solid metal lithium battery and its preparation method, which is used to solve the problem of the safety of solid polymer electrolyte although there are It has been improved, but the polymer still has flammable characteristics, which poses a safety hazard

Method used

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  • All-solid-state metal lithium battery and preparation method thereof
  • All-solid-state metal lithium battery and preparation method thereof
  • All-solid-state metal lithium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A flame retardant additive, comprising the steps of:

[0040] Step S11: Add o-xylene into the flask, then feed 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide with nitrogen gas at a temperature of 90°C and a speed of 400r / min Stir at low temperature for 20 minutes, then slowly add diethylene succinic acid into the flask, and after the addition is complete, reflux at 140°C for 7 hours. After the reaction, the reaction solution is cooled to room temperature, and the intermediate 1 is obtained by suction filtration;

[0041] Step S12: Add the intermediate 1 prepared in step S1 into a flask filled with deionized water, stir for 20 min at a rotation speed of 400 r / min, then add thionyl chloride to it, heat up to 60° C. for reflux reaction for 9 h, and the reaction ends Afterwards, the temperature was raised to 80° C. to remove unreacted thionyl chloride, and the solvent was removed by rotary evaporation to obtain intermediate 2;

[0042] Step S13: Add dichloromethane and...

Embodiment 2

[0045] A flame retardant additive, comprising the steps of:

[0046] Step S11: Add o-xylene in the flask, then feed 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide into nitrogen gas at a temperature of 90°C and a speed of 500r / min Stir at low temperature for 25 minutes, then slowly add diethylene succinic acid into the flask, and reflux at 145°C for 7.5 hours after the addition is complete. After the reaction, the reaction solution is cooled to room temperature, and the intermediate 1 is obtained by suction filtration;

[0047] Step S12: Add the intermediate 1 prepared in step S1 into a flask filled with deionized water, stir for 20 min at a rotation speed of 400 r / min, then add thionyl chloride therein, raise the temperature to 65° C. for 9.5 h under reflux, and react After the end, the temperature was raised to 82.5°C again to remove the unreacted thionyl chloride, and the solvent was removed by rotary evaporation to obtain intermediate 2;

[0048] Step S13: Add dichloro...

Embodiment 3

[0051] A flame retardant additive, comprising the steps of:

[0052] Step S11: Add o-xylene in the flask, then feed 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide with nitrogen gas at a temperature of 90°C and a speed of 600r / min Stir at low temperature for 30 minutes, then slowly add diethylene succinic acid into the flask, and reflux at 150°C for 8 hours after the addition is complete. After the reaction, the reaction solution is cooled to room temperature, and the intermediate 1 is obtained by suction filtration;

[0053] Step S12: Add the intermediate 1 prepared in step S1 into a flask filled with deionized water, stir for 20 min at a rotation speed of 400 r / min, then add thionyl chloride to it, heat up to 70°C and reflux for 10 h, and the reaction ends Afterwards, the temperature was raised to 85° C. to remove unreacted thionyl chloride, and the solvent was removed by rotary evaporation to obtain intermediate 2;

[0054] Step S13: Add dichloromethane and triethylamin...

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Abstract

The invention discloses an all-solid-state metal lithium battery and a preparation method thereof, belongs to the technical field of preparation of solid-state metal lithium batteries, and aims to solve the problems that although the safety of a solid-state polymer electrolyte used by the solid-state metal lithium battery is improved, the polymer still has the characteristic of flammability, and hidden safety troubles exist. The all-solid-state metal lithium battery is prepared from a positive plate, a negative plate and an all-solid-state electrolyte membrane, and a flame retardant additive added into the all-solid-state electrolyte membrane is a phosphorus-nitrogen flame retardant prepared from 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and diethylene succinic acid as raw materials step by step, has the characteristics of the phosphorus flame retardant and the nitrogen flame retardant at the same time, has a synergistic effect and has a better flame retardant effect, and the all-solid-state metal lithium battery is finally prepared by applying the phosphorus-nitrogen flame retardant and the nitrogen-phosphorus flame retardant, and has good flame retardant property and high safety performance.

Description

technical field [0001] The invention relates to the technical field of preparation of solid-state lithium metal batteries, in particular to an all-solid-state lithium metal battery and a preparation method thereof. Background technique [0002] In today's world, human beings are facing the severe problem of the depletion of fossil energy sources and the growing demand for sustainable energy sources, thus promoting the research on low-cost, environmentally friendly and high-performance energy conversion and storage systems. At the same time, with the rapid increase in demand for electric vehicles and smart grid applications, there is therefore an increasing market demand for batteries that can provide high energy density, stable recyclability, and excellent cost-effectiveness. [0003] Lithium metal has a high mass (3860Ah / KG) and volume (2050Ah / L) energy density, and can be used as a negative electrode material for lithium batteries. For example, lithium metal is used as the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525H01M10/058A62C3/16
CPCH01M10/0525H01M10/0565H01M10/058A62C3/16H01M2200/00H01M2300/0091Y02P70/50Y02E60/10
Inventor 张火锐
Owner 张火锐
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