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Composite polymer electrolyte and its production

A technology of composite polymer and electrolyte, applied in the field of electrolyte and its preparation, can solve the problems of difficult control of drying speed with single solvent, poor physical properties of products, low conductivity at room temperature, etc.

Inactive Publication Date: 2007-09-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low room temperature conductivity of existing PEO-based polymer electrolytes and poor physical properties of products due to the difficulty in controlling the drying speed of a single solvent, and to provide a composite polymer electrolyte and a preparation method thereof

Method used

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Examples

Experimental program
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specific Embodiment approach 1

[0009] Embodiment 1: The composite polymer electrolyte of this embodiment is composed of PEO, lithium salt and filler, wherein the mass ratio of lithium salt to PEO is 0.1-0.5:1, and the mass ratio of filler to PEO is 0.01-0.25:1.

[0010] The electrical conductivity of the polymer composite electrolyte of the present embodiment is high (conductivity > can reach 5 * 10 at 20 ℃ -5 S cm -1 ).

specific Embodiment approach 2

[0011] Embodiment 2: In this embodiment, the mass ratio of lithium salt to PEO is 0.2-0.4:1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Embodiment 3: In this embodiment, the mass ratio of lithium salt to PEO is 0.3:1. Others are the same as in the first embodiment.

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Abstract

A composite polymer electrolyte and its production are disclosed. The electrolyte consists of PEO, lithium salt and filler. The process is carried out by mixing lithium salt with organic solvent in proportion of 0.1-0.01, adding into PEO in proportion of 0.01-0.25:1, mixing filler with organic solvent, laying aside, mixing blend 1 with blend 2, pouring it into mold, drying and forming. It has excellent conductivity and physical property.

Description

technical field [0001] The invention relates to an electrolyte and a preparation method thereof. Background technique [0002] Currently widely studied PEO-lithium salt composite electrolytes (lithium salts include LiClO 4 , LiTFSI, LiCF 3 SO 3 etc.) have the following disadvantages: [0003] ① Low conductivity at room temperature; [0004] ②Ultrafine powder filler (Al 2 o 3 、TiO 2 , ZrO 2 , SiO 2 , clay, saponite, etc.) do not conduct electricity, so these materials are electrochemically inert substances; Contents of the invention [0005] The purpose of the present invention is to provide a composite polymer electrolyte and a preparation method thereof in order to solve the problems of low room temperature conductivity of the existing PEO-based polymer electrolyte and difficulty in controlling the drying speed of a single solvent resulting in poor physical properties of the product. The composite polymer electrolyte of the present invention is composed of PEO, ...

Claims

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Application Information

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IPC IPC(8): C08L71/02C08K3/24C08K3/04
Inventor 顾大明张鼎杨柳孙旺
Owner HARBIN INST OF TECH