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All-solid-state lithium-ion battery based on topological-structured polymer electrolyte

A lithium-ion battery and topological structure technology, which is applied in secondary batteries, circuits, electrical components, etc., can solve problems such as the limitation of high-temperature instability of liquid electrolytes, affecting the service life of lithium-ion batteries, and potential safety hazards, and achieve good solubility and film-forming properties, improved electrical conductivity, and reduced crystallinity

Inactive Publication Date: 2016-07-13
UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the commercialized lithium-ion batteries are liquid lithium-ion batteries based on organic liquid electrolytes, and organic liquid electrolytes are easy to leak and volatile, which greatly affects the service life of lithium-ion batteries and brings great safety hazards , the explosion of many electronic products such as mobile phones is mostly directly related to the leakage of the battery, and the high-temperature instability of the liquid electrolyte itself has also led to the limitation of lithium-ion batteries in high-temperature fields.

Method used

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  • All-solid-state lithium-ion battery based on topological-structured polymer electrolyte
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  • All-solid-state lithium-ion battery based on topological-structured polymer electrolyte

Examples

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Effect test

Embodiment 1

[0039] see figure 1 , with lithium iron phosphate as the positive electrode active material (80%wt), add 10%wt PVDF (polyvinylidene fluoride), add 10%wt conductive carbon black, and form the positive electrode material on the aluminum foil. Using hyperbranched polyether as the polymer electrolyte matrix, adding 20%wt LiITFSI (lithium bistrifluoromethanesulfonimide) to form a polymer electrolyte material by solution volatilization, using lithium sheets as the negative electrode material, the positive electrode material, polymerized The material electrolyte and the negative electrode material are stacked in the CR2016 battery case in sequence to form an all-solid lithium-ion battery.

Embodiment 2

[0041] see figure 1 , using lithium iron silicate as the positive electrode active material (80%wt), adding 10%wt of PVDF (polyvinylidene fluoride), adding 10%wt of conductive carbon black, and forming the positive electrode material on the aluminum foil. Using hyperbranched polyether as the polymer electrolyte matrix, add 20%wt LiITFSI (lithium bistrifluoromethanesulfonimide), 10% nano-silica, form a polymer electrolyte material by solution volatilization, and use silicon-carbon composite The material is an anode material. The positive electrode material, polymer electrolyte, and negative electrode material are sequentially stacked in the CR2016 battery case to form an all-solid lithium-ion battery.

Embodiment 3

[0043] see figure 1, with poly 2,2,6,6-tetramethyl-4-hydroxypiperidine-1-oxygen as the positive electrode active material (80%wt), adding 10%wt of PVDF (polyvinylidene fluoride), adding 10% The conductive carbon black of wt forms the positive electrode material on the aluminum foil. Using hyperbranched polyether as the polymer electrolyte matrix, adding 20%wt LiITFSI (lithium bistrifluoromethanesulfonimide) and 10% polyimide, the polymer electrolyte material was formed by solution volatilization, and graphene was used as the The negative electrode material, the positive electrode material, the polymer electrolyte, and the negative electrode material are sequentially stacked in the CR2016 battery case to form an all-solid lithium-ion battery.

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Abstract

The invention discloses an all-solid-state lithium-ion battery based on topological-structured polymer electrolyte. The all-solid-state lithium-ion battery is characterized by being formed by arranging and packaging a positive electrode material, the topological-structured polymer electrolyte and a negative electrode material in sequence, wherein the electrolyte is composed of a solid-state polymer matrix with a topological structure and lithium salt, and the polymer is a hyper-branched or star-shaped polymer matrix; the positive electrode material comprises a positive electrode active substance of a positive electrode piece, a conductive additive and an adhesive; and the negative electrode material comprises a negative electrode piece and a negative electrode active substance. The all-solid-state lithium-ion battery based on the topological-structured polymer electrolyte has the beneficial effects that the unique topological structure of the hyper-branched / star-shaped polymer can be used for reducing the crystallization performance of the polymer and thus introducing more chain segments with relatively good salt dissolving capability into a polymer structure, so that the conductivity of the polymer electrolyte is improved, good dissolubility and film forming property of the polymer electrolyte are also guaranteed, and the all-solid-state lithium-ion battery can express the effect very well.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, and in particular relates to an all-solid-state lithium-ion battery based on a topological structure polymer electrolyte. Background technique [0002] Most of the commercialized lithium-ion batteries are liquid lithium-ion batteries based on organic liquid electrolytes, and organic liquid electrolytes are easy to leak and volatile, which greatly affects the service life of lithium-ion batteries and brings great safety hazards , The explosion of many electronic products such as mobile phones is mostly directly related to the leakage of the battery, and the high-temperature instability of the liquid electrolyte itself has also led to the limitation of the application of lithium-ion batteries in high-temperature fields. Compared with traditional organic liquid electrolytes, all-solid polymer electrolyte materials can not only solve the problems caused by existing liquid electrolytes, but also b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0565
CPCH01M10/0525H01M10/0565Y02E60/10
Inventor 张辽云王蔼廉许浩刘旭周倩胡友良
Owner UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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