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Polymer battery and preparation method thereof

A polymer and polyelectrolyte technology, applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of slow interaction and reaction, explosion, electrolyte heating, etc., and achieve excellent mechanical properties and electrical conductivity. High, large electrochemical window effect

Inactive Publication Date: 2019-04-05
广东永邦新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For polymer batteries containing liquid electrolytes, due to the slow interaction and reaction of liquid electrolytes with electrode materials and packaging materials, the solvent is easy to dry up, volatilize, and leak during long-term service, and the electrode materials are easy to be corroded, which affects battery life
In addition, for lithium-ion rechargeable batteries using organic electrolyte, overcharging, internal short circuit and other abnormal conditions may cause the electrolyte to heat up, which may cause spontaneous combustion or explosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A polymer battery, the polymer battery is composed of a positive electrode system, a negative electrode system and a polymer electrolyte, characterized in that: the polymer electrolyte includes 10 parts by weight of PEO matrix, 1 part by weight of lithium salt, N,N-dimethyl 15 parts by weight of base formamide and 5 parts by weight of plasticizer.

[0020] The lithium salt is selected from LiPF 6 .

[0021] The plasticizer is a composition of ethylene carbonate, propylene carbonate and diethyl carbonate with a mass ratio of 1:1:1.

[0022] The polyelectrolyte also includes 1 part by weight of nano-nickel oxide.

[0023] A kind of preparation method of polymer battery, it is to realize according to the following steps:

[0024] Step 1: Under the protection of an inert gas, dissolve the PEO matrix and lithium salt in N,N-dimethylformamide, add a plasticizer, stir, and mix evenly to obtain a transparent viscous liquid;

[0025] Step 2: Casting the transparent viscous l...

Embodiment 2

[0027] A polymer battery, the polymer battery is composed of a positive electrode system, a negative electrode system and a polymer electrolyte, characterized in that: the polymer electrolyte includes 11 parts by weight of PEO copolymer matrix, 2 parts by weight of lithium salt, N,N- 30 parts by weight of dimethylformamide and 10 parts by weight of plasticizer.

[0028] The PEO copolymer matrix is ​​polyethylene oxide-b-tert-butyl polyacrylate.

[0029] The lithium salt is selected from LiPF 6 .

[0030] The plasticizer is a composition of ethylene carbonate, propylene carbonate and diethyl carbonate with a mass ratio of 1:3:1.

[0031] The polyelectrolyte also includes 3 parts by weight of nano-nickel oxide.

[0032] A kind of preparation method of polymer battery, it is to realize according to the following steps:

[0033] Step 1: Under the protection of an inert gas, dissolve the PEO copolymer matrix and lithium salt in N,N-dimethylformamide, add a plasticizer, stir, an...

Embodiment 3

[0037] A polymer battery, the polymer battery is composed of a positive electrode system, a negative electrode system and a polymer electrolyte, characterized in that: the polymer electrolyte includes 12 parts by weight of a PEO copolymer matrix, 3 parts by weight of lithium salt, N,N- 50 parts by weight of dimethylformamide and 15 parts by weight of plasticizer.

[0038] The PEO copolymer matrix is ​​polyethylene oxide-b-tert-butyl polyacrylate.

[0039] The lithium salt is selected from LiBF 4 .

[0040] The plasticizer is a composition of ethylene carbonate, propylene carbonate and diethyl carbonate with a mass ratio of 1:4:1.

[0041] The polyelectrolyte also includes 5 parts by weight of nano-nickel oxide.

[0042] A kind of preparation method of polymer battery, it is to realize according to the following steps:

[0043] Step 1: Under the protection of an inert gas, dissolve the PEO copolymer matrix and lithium salt in N,N-dimethylformamide, add a plasticizer, stir, ...

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PUM

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Abstract

The invention relates to the technical field of polymer batteries, in particular to a polymer battery and a preparation method thereof. The polymer battery comprises a positive electrode system, a negative electrode system and a polymer electrolyte, the polyelectrolyte comprises part by weight: 10-12 parts of a PEO matrix or a PEO copolymer matrix, 1-3 parts of lithium salt, 15-50 parts of N, N-dimethylformamide and 5-15 parts of a plasticizer. The copolymer of the PEO matrix or the PEO copolymer is a matrix, the prepared electrolyte membrane is uniform and dense, high in electrical conductivity, large in electrochemical window and good in mechanical properties, and can meet the demands of the polymer electrolyte for all-solid lithium ion batteries.

Description

technical field [0001] The invention relates to the technical field of polymer batteries, in particular to a polymer battery and a preparation method thereof. Background technique [0002] Lithium-ion secondary batteries have common structural features, including a cathode, an anode, an organic electrolyte, and a Li-ion permeable separator arranged between the electrodes. The redox reactions that take place at the electrodes generate electricity. Lithium ion secondary batteries can be classified into two types according to the type of electrolyte used: polymer batteries using liquid electrolytes and lithium ion polymer batteries using solid polymer electrolytes. [0003] For polymer batteries containing liquid electrolytes, due to the slow interaction and reaction between liquid electrolytes, electrode materials, and packaging materials, the solvent is easy to dry up, volatilize, and leak during long-term service, and the electrode materials are easy to be corroded, which a...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525H01M10/058B82Y30/00
CPCB82Y30/00H01M10/0525H01M10/0565H01M10/058Y02E60/10Y02P70/50
Inventor 姚学永黄剑
Owner 广东永邦新能源股份有限公司