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Solid electrolyte having room-temperature conductivity polymer matrix and preparation method thereof

A technology of solid electrolyte and solid electrolyte, applied in the direction of solid electrolyte, electrolyte battery manufacturing, electrolyte, etc., can solve the problems of low liquid electrolyte conductivity, etc., achieve low cost, wide application prospects, and improve safety performance

Inactive Publication Date: 2018-08-03
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the room temperature lithium-ion conductivity of the solid-state electrolyte used in common lithium-ion batteries is about 10. -6 S cm -1 , much lower than the conductivity of the liquid electrolyte

Method used

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  • Solid electrolyte having room-temperature conductivity polymer matrix and preparation method thereof
  • Solid electrolyte having room-temperature conductivity polymer matrix and preparation method thereof
  • Solid electrolyte having room-temperature conductivity polymer matrix and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] In this example, see figure 1 , a polymer-matrix solid electrolyte with room temperature conductivity, the organic polymer PEO is used as the matrix, and the lithium salt LiClO is uniformly doped in PEO 4 and inorganic material particles 2, inorganic material particles 2 using SiO 2 Particles, where SiO 2 The particles form an ordered distribution of chain particles in the radial direction of the solid electrolyte, so that SiO 2 The particles form fast ion channels at the interface of the electrolyte, forming a fast ion conductor structure. see figure 1 , the organic polymer PEO and the lithium salt LiClO 4The matrix composite material 1 is formed. Compared with the doped phase of the common composite material, the solid electrolyte of the polymer matrix in this embodiment makes the inorganic ceramic particles change from disordered distribution to ordered distribution during the solidification of the organic polymer electrolyte to form a film, and the prepared Hig...

Embodiment 2

[0040] This embodiment is basically the same as Embodiment 1, especially in that:

[0041] In this embodiment, a solid electrolyte with a polymer matrix with room temperature conductivity uses an organic polymer PAN as a matrix, uniformly doping lithium salt LiTFSI and inorganic material particles 2 in PAN, and the inorganic material particles 2 are LLZTO particles , in which the LLZTO particles form an ordered distribution of chain particles in the radial direction of the solid electrolyte, so that the LLZTO particles form fast ion channels at the interface of the electrolyte, forming a fast ion conductor structure. The organic polymer PAN and the lithium salt LiTFSI form a matrix composite material 1. Compared with the doped phase of the common composite material, the solid electrolyte of the polymer matrix in this embodiment makes the inorganic ceramic particles distributed randomly in the solidified film of the organic polymer electrolyte. Transform into an orderly distrib...

Embodiment 3

[0048] This embodiment is basically the same as the previous embodiment, and the special features are:

[0049] In this example, a solid electrolyte with a polymer matrix with room temperature conductivity uses organic polymer PEO as the matrix, and uniformly doped lithium salt LiClO in PEO 4 and inorganic material particles 2, PEO and LiClO 4 The mass ratio is 5:1, and the inorganic material particles 2 are made of Al 2 o 3 Particles, where Al 2 o 3 The particles form an ordered distribution of chain particles in the radial direction of the solid electrolyte, so that Al 2 o 3 The particles form fast ion channels at the interface of the electrolyte, forming a fast ion conductor structure. Organic polymer PEO and lithium salt LiClO 4 The matrix composite material 1 is formed. Compared with the doped phase of the common composite material, the solid electrolyte of the polymer matrix in this embodiment makes the inorganic ceramic particles change from disordered distributi...

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Abstract

The invention discloses a solid electrolyte having a room-temperature conductivity polymer matrix and a preparation method thereof. According to the invention, an organic polymer is taken as the matrix, lithium salt and inorganic material particles are uniformly doped, the inorganic material particles form ordered distribution on the solid electrolyte along a radial direction, the inorganic material particles form a fast ion channel at an electrolyte interface position, and a fast ionic conductor structure is formed. the inorganic material particles in an electrolyte are subjected to polarization by using an electric field, the particles have the fast ion channel at the electrolyte interface position, the particles with ordered distribution can form a chain by polarization, the fast ion channel can be radially formed in the electrolyte, and the conductivity is increased. The solid electrolyte has the characteristics of high room temperature conductivity and good mechanical property, can be used for the room temperature solid lithium ion cell electrolyte, the room temperature solid lithium ion battery of the solid electrolyte has high charge and discharge multiplying power, cycle stability and security, and can be used for hand-held electronic equipment and electric automobile and the like.

Description

technical field [0001] The invention relates to a solid electrolyte and a preparation method thereof, in particular to a polymer matrix solid electrolyte and a preparation method thereof, which are applied in the technical field of secondary lithium ion battery energy storage. Background technique [0002] Lithium-ion battery is a green energy storage device, which plays an important role in the country's advocacy of shifting from traditional fossil energy to green new clean energy. Lithium-ion batteries have the advantages of high energy density, high output voltage, and long service life. Lithium-ion batteries currently on the market mainly use organic liquid electrolytes and gel electrolytes, and the above-mentioned electrolytes contain volatile, flammable, and explosive organic liquids, which bring serious safety hazards to the battery system. The use of solid-state electrolytes can effectively improve the safety of lithium-ion batteries. However, the room temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/058H01M10/0525
CPCH01M10/0525H01M10/056H01M10/058H01M2300/0065H01M2300/0091Y02E60/10Y02P70/50
Inventor 徐福忠邱子文刘畅吕迎春陈日明郭炳焜
Owner SHANGHAI UNIV
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