Polymer for lithium ion battery, preparation method of polymer, lithium ion battery gel electrolyte and preparation method thereof

A technology of lithium ion battery and gel electrolyte, applied in the field of lithium ion battery and its preparation, can solve the problems of inability to meet ultra-thin electronic devices, low energy density, low safety factor, etc., and achieves improved safety factor, excellent chemical performance, The effect of high production efficiency

Inactive Publication Date: 2015-10-07
储盈新能源科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of traditional lithium battery only uses a solvent to dissolve the electrolyte, which is liquid, there is a risk of leakage, low safety factor, and easy to explode; and the plasticity is poor, the shape made is limited, and it cannot meet the requirements of products of all shapes; the energy density is low, As a result, the thinnest thickness cannot be less than 3.6mm, which cannot meet the requirements of ultra-thin electronic devices

Method used

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  • Polymer for lithium ion battery, preparation method of polymer, lithium ion battery gel electrolyte and preparation method thereof
  • Polymer for lithium ion battery, preparation method of polymer, lithium ion battery gel electrolyte and preparation method thereof
  • Polymer for lithium ion battery, preparation method of polymer, lithium ion battery gel electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The electrolyte solution is mixed with the raw materials and additives for preparing polymers for lithium-ion batteries, and the mixed solution is heated at 70°C for 2 hours, and the raw materials for preparing polymers for lithium-ion batteries are exchanged under the action of additives. to form polymers for lithium-ion batteries. Lithium-ion batteries use polymers to firmly adsorb the electrolyte solution to form a lithium-ion battery gel electrolyte.

[0050] Wherein, the electrolyte solution is an organic solvent in which lithium salt is dissolved, and the lithium salt concentration is 0.5 mol / L. The lithium salt is lithium hexafluorophosphate, the organic solvent is vinylene carbonate and diethyl carbonate, and the weight ratio of vinylene carbonate and diethyl carbonate is 1:1.

[0051] The proportioning ratio of the raw materials and auxiliary agents used to prepare the polymer for lithium ion batteries is shown in Table 1, and the weight of the prepared polyme...

Embodiment 2

[0055] The electrolyte solution is mixed with the raw materials and additives for preparing polymers for lithium-ion batteries, and the mixed solution is heated at 70°C for 2 hours, and the raw materials for preparing polymers for lithium-ion batteries are exchanged under the action of additives. to form polymers for lithium-ion batteries. Lithium-ion batteries use polymers to firmly adsorb the electrolyte solution to form a lithium-ion battery gel electrolyte.

[0056] Wherein, the electrolyte solution is an organic solvent in which lithium salt is dissolved, and the lithium salt concentration is 1.5 mol / L. The lithium salt is lithium hexafluorophosphate, the organic solvent is vinylene carbonate and diethyl carbonate, and the weight ratio of vinylene carbonate and diethyl carbonate is 1:1.

[0057] The proportioning ratio of the raw materials and auxiliary agents used to prepare the polymer for lithium ion batteries is shown in Table 2, and the weight of the prepared polyme...

Embodiment 3

[0061] The electrolyte solution is mixed with the raw materials and additives for preparing polymers for lithium-ion batteries, and the mixed solution is heated at 70°C for 2 hours, and the raw materials for preparing polymers for lithium-ion batteries are exchanged under the action of additives. link to form polymers. Lithium-ion batteries use polymers to firmly adsorb the electrolyte solution to form a lithium-ion battery gel electrolyte.

[0062] Wherein, the electrolyte solution is an organic solvent in which lithium salt is dissolved, and the lithium salt concentration is 1.0 mol / L. The lithium salt is lithium hexafluorophosphate, the organic solvent is vinylene carbonate and diethyl carbonate, and the weight ratio of vinylene carbonate and diethyl carbonate is 1:1.

[0063] The proportioning ratio of raw materials and auxiliary agents used to prepare the polymer for lithium ion batteries is shown in Table 3, and the weight of the prepared polymer for lithium ion batteri...

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Abstract

The invention discloses a polymer for a lithium ion battery, a preparation method of the polymer, a lithium ion battery gel electrolyte and a preparation method thereof. The polymer is characterized by being prepared by crosslinking of raw materials including polyvinyl alcohol, anhydride and isocyanate under action of auxiliaries, and the auxiliaries include initiator and assistant auxiliary. Compared with conventional lithium ion batteries, the lithium ion battery has the advantages that liquid retaining capability is improved greatly, liquid leakage can be prevented effectively, dangers such as explosion and burning caused by liquid leakage are avoided, and safety coefficient is high.

Description

technical field [0001] The invention relates to a polymer for lithium ion batteries and a preparation method thereof, a lithium ion battery gel electrolyte having the polymer for lithium ion batteries and a preparation method thereof, a lithium ion battery using the gel electrolyte and its preparation method. Background technique [0002] Energy and the environment are two severe issues that human beings must face in the 21st century. The development of new energy and clean and renewable energy will be one of the most decisive technical fields in the future world economy. Since the advent of lithium-ion batteries, due to the rapid development of mobile communications and notebook computers, the requirements for power miniaturization, light weight, long working hours, long life, no memory effect and no pollution to the environment have developed rapidly. A traditional lithium battery consists of a positive electrode, a negative electrode, and an electrolyte solution. This k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0564H01M10/058H01M10/0525
CPCH01M10/0525H01M10/0564H01M10/0565H01M10/058Y02E60/10Y02P70/50
Inventor 周良
Owner 储盈新能源科技(上海)有限公司
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