Preparation method of high voltage resistant polymer solid electrolyte membrane and preparation method of lithium ion battery

A solid electrolyte membrane and polymer technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, solid electrolytes, etc., can solve problems such as differences in initial charge and discharge capacity, achieve electrochemical stability and improve mechanical properties, and have wide application prospects Effect

Active Publication Date: 2020-11-27
武汉新能源研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The initial charge and discharge capacity of the battery varies considerably due to the combination of carbon anode materials and electrolytes. Although there are many organic substances, inorganic substances and lithium salts that can form electrolytes, there are not many that can be used in lithium-ion batteries.

Method used

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  • Preparation method of high voltage resistant polymer solid electrolyte membrane and preparation method of lithium ion battery
  • Preparation method of high voltage resistant polymer solid electrolyte membrane and preparation method of lithium ion battery
  • Preparation method of high voltage resistant polymer solid electrolyte membrane and preparation method of lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Example 1 of the present invention is a method for preparing a high-voltage polymer solid electrolyte membrane. Add functionalized HO-PPG500-OH and crosslinking agent NCO-PPO2300-NCO to chloroform, react for the first preset time, and pour Cross-linked into a film in the mold.

[0039] Such as figure 1 As shown, a highly cross-linked polymer solid electrolyte membrane was synthesized, and the carbamate group -NHCOO- formed by the reaction of -NCO and -OH was introduced into the polymer solid electrolyte membrane, and the carbamate group -NHCOO -With high dielectric constant and polarization density, and a strong hydrogen bond system formed in the entire polymer solid electrolyte membrane system, the electrochemical stability window of the electrolyte made of this polymer solid electrolyte membrane can reach 5V, and the electrochemical The stability and mechanical properties have been significantly improved, and it has broad application prospects in the field of lithium...

Embodiment 2

[0040] Example 2 of the present invention is a method for preparing a high-voltage polymer solid electrolyte membrane. On the basis of Example 1, the preparation method specifically includes the following steps:

[0041] Step 1, react functionalized HO-PPG500-OH with a type of silane coupling agent to generate silanized polypropylene glycol PPG500; wherein, a type of silane coupling agent such as: 3-isocyanopropyltriethoxysilane IPTS;

[0042]Step 2, cross-linking the silanized polypropylene glycol PPG500 with silica sol to generate silicon dioxide-based polypropylene glycol PPG500;

[0043] Step 3, adding the silicon dioxide-based polypropylene glycol PPG500 and the cross-linking agent NCO-PPO2300-NCO into chloroform, reacting for the first preset time, and then pouring into a mold to cross-link to form a film.

Embodiment 3

[0044] Example 3 of the present invention is a method for preparing a high-voltage resistant polymer solid electrolyte membrane. On the basis of Example 2, the step 1 is specifically: dissolving the functionalized HO-PPG500-OH in tetrahydrofuran THF, and sequentially Nitrogen is passed into the tetrahydrofuran THF, the catalyst dibutyltin dilaurate DBTDL is added, and a type of silane coupling agent is added to react to generate silanized polypropylene glycol PPG500.

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Abstract

The invention relates to a preparation method of a high-voltage-resistant polymer solid-state electrolyte membrane and a preparation method of a lithium-ion battery. Functionalized HO-PPG500-OH and crosslinking agent NCO-PPO2300-NCO are added to chloroform to react the first preset After a while, pour into a mold to cross-link to form a film. Synthesize a highly cross-linked polymer solid electrolyte membrane, and introduce a carbamate group -NHCOO - formed by the reaction of -NCO and -OH into the polymer solid electrolyte membrane, and the carbamate group -NHCOO - has a high The dielectric constant and polarization density, as well as the strong hydrogen bond system formed in the entire polymer solid electrolyte membrane system, make the electrochemical stability window of the electrolyte prepared by using this polymer solid electrolyte membrane reach 5V, and the electrochemical stability and The mechanical properties have been significantly improved, and it has broad application prospects in the field of lithium-ion system energy storage.

Description

technical field [0001] The invention relates to the technical field of green energy storage, in particular to a method for preparing a high-voltage-resistant polymer solid-state electrolyte membrane and a method for preparing a lithium-ion battery. Background technique [0002] Lithium-ion batteries have shown broad development and application prospects and huge economic benefits in many aspects, and are considered to be the best power supply solution for electric vehicles. However, with the continuous improvement of people's demand for electric vehicles, there are higher requirements for the energy density of lithium-ion batteries, and it is extremely urgent to develop a battery system with higher energy density. However, the problem of the decomposition of the non-aqueous electrolyte solution currently used in traditional lithium-ion batteries under high voltage greatly limits the use of high-voltage lithium-ion batteries. In high-voltage lithium-ion batteries, it is diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/058H01M10/0525
CPCH01M10/0525H01M10/0565H01M10/058H01M2220/20H01M2300/0082Y02E60/10Y02P70/50
Inventor 曹元成程时杰
Owner 武汉新能源研究院有限公司
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