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A deformable lithium-air battery and its assembly method

A technology of a lithium-air battery and an assembly method, which is applied to fuel cell type half cells and primary cell type half cells, etc., can solve the problems of reduction failure, blocking of ion conduction channels in the system, and achieve corrosion prevention and high gas barrier. Powerful, practical effects

Active Publication Date: 2020-07-31
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of these electrolytes in lithium-air batteries has encountered huge technical challenges. First, these polymer electrolytes decompose in the presence of active oxygen in lithium-air batteries, or are reduced to failure on the surface of metal lithium negative electrodes, so The chemical stability of polymer electrolytes needs to be further improved for the application requirements of lithium-air batteries
At the same time, in the special structure of open or semi-open lithium-air batteries, the vapor pressure of the polymer electrolyte is too high and volatilizes seriously, resulting in the blockage of the ion conduction channel of the system

Method used

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  • A deformable lithium-air battery and its assembly method
  • A deformable lithium-air battery and its assembly method
  • A deformable lithium-air battery and its assembly method

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Embodiment 1

[0025] A deformable lithium-air battery, including a keyboard-type housing with an inclusion structure composed of a protruding rigid part and a concave flexible part, the material of the housing is polypropylene, nylon and aluminum, and a polymer electrolyte, the polymer electrolyte The composition (mass ratio) is as follows: polyvinylidene fluoride-hexafluoropropylene accounting for 7.2% of the polymer electrolyte, 21.4% poly 2-hydroxy-2-methyl-1-phenyl-1-propanone, 28.6% sulfolane , 21.4% tetraethylene glycol dimethyl ether, 21.4% lithium difluorooxalate borate. The rigid part of the case is filled with air cathode and polymer electrolyte, the air cathode is made of manganese dioxide attached to the surface of nickel foam, and the surface of the rigid part of the case is the air diffusion channel. The flexible part of the casing corresponds to the polymer electrolyte and negative electrode inside the battery, and the negative electrode is lithium metal. The polymer electro...

Embodiment 2

[0029] A deformable lithium-air battery, comprising: a keyboard housing with an inclusion structure consisting of a protruding rigid part and a concave flexible part, the housing material is made of polypropylene, nylon and aluminum, and a polymer electrolyte, a polymer electrolyte The composition (mass ratio) of the polymer electrolyte is as follows: 7.2% of polyvinylidene fluoride-hexafluoropropylene, 18.5% of poly 2-hydroxy-2-methyl-1-phenyl-1-propene, 2.9% of 4,4'-Diphenylmethane diisocyanate, 50% dimethyl sulfoxide, 21.4% lithium aluminum tetrachloride. The rigid part of the case is filled with an air cathode and a polymer electrolyte, the air cathode is made of carbon nanotubes attached to the surface of carbon paper, and the surface of the rigid part of the case is an air diffusion channel. The flexible part of the casing corresponds to the polymer electrolyte inside the battery and the negative electrode, which is a lithium alloy. The polymer electrolyte forms a dense...

Embodiment 3

[0033] A deformable lithium-air battery, comprising: a keyboard housing with an inclusion structure consisting of a protruding rigid part and a concave flexible part, the housing material is made of polyethylene, nylon and aluminum, and a polymer electrolyte, a polymer electrolyte The composition (mass ratio) of the polymer electrolyte is as follows: 14.5% polyvinyl formal, 5.8% 4,4'-diphenylmethane diisocyanate, 70% tetraethylene glycol dimethyl ether, 9.7% Lithium bistrifluoromethanesulfonyl imide. The rigid part of the shell is filled with air cathode and polymer electrolyte. The air cathode is made of carbon nanotube composite manganese dioxide attached to the surface of carbon paper. The surface of the rigid part of the shell is an air diffusion channel. The flexible part of the casing corresponds to the polymer electrolyte and negative electrode inside the battery, and the negative electrode is lithium metal. The polymer electrolyte forms a dense film on the negative el...

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Abstract

The invention provides a deformable lithium air battery and an assembling method thereof. A special rigid and flexible alternating keyboard type deformable structure is used, so that stable work of the lithium air battery in different conditions as extruding and bending is realized while a rigid part of the battery is not damaged. Via cooperation of the flexible polymer electrolyte with certain composition and structure characteristics, material basis is provided for construction of the deformable lithium air battery, a flexible polymer forms a tightly combined compact film in the surface of lithium, so that the lithium cathode is protected against corrosion by impurity gas, and stable work in the air is ensured.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, in particular to a deformable lithium-air battery and an assembly method thereof. Background technique [0002] Lithium-air battery is a battery system composed of lithium negative electrode and air positive electrode. Oxygen in the air is not stored inside the battery as an active substance, and the source is unlimited. Therefore, theoretically speaking, the capacity of the battery is only limited by the lithium negative electrode. The chemical equivalent of lithium metal is as high as 3860 mAh / g, making the theoretical specific energy of lithium-air batteries reach 11140 Wh / kg, which is 6-9 times that of lithium-ion batteries, and comparable to the specific energy of gasoline (13000 Wh / kg). In 1996, K. M. Abraham and Z. Jiang successfully assembled a rechargeable lithium-oxygen battery for the first time using PAN-based organic polymer electrolyte membrane, metal lithium negative...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/06
Inventor 连芳孟楠叶宇宁况子琪秦晓楠李楠欧阳佚朋
Owner UNIV OF SCI & TECH BEIJING
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