Lithium carbon fluoride battery positive pole piece, preparation method thereof and lithium carbon fluoride battery

A technology of lithium fluoride carbon battery and positive electrode sheet, which is applied to the electrodes of primary batteries, electrode manufacturing, battery electrodes, etc., and can solve problems such as complex processes

Active Publication Date: 2021-05-11
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the method is complicated

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  • Lithium carbon fluoride battery positive pole piece, preparation method thereof and lithium carbon fluoride battery
  • Lithium carbon fluoride battery positive pole piece, preparation method thereof and lithium carbon fluoride battery

Examples

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Effect test

Embodiment 1

[0054] A preparation method of a lithium carbon fluoride battery positive pole piece:

[0055] (1) The fluorocarbon material (CF 0.99 ), binder (PVDF), conductive agent (SP and CNT mass ratio of 1:1), chloride (NaCl) and solvent (NMP) are mixed, wherein fluorinated carbon material: binder: conductive agent: chloride The mass ratio is 90:5:4.9:0.1, and the obtained viscosity is the positive electrode slurry of 10000MPa;

[0056] (2) Coating the positive electrode slurry on the current collector (aluminum foil) with a coating thickness of 160 μm, then adjusting the rolling temperature to 25° C. and the rolling pressure to 60 tons to obtain a compacted density of 1.6 g / cm 3 , to obtain a lithium carbon fluoride battery cathode sheet with a porosity of 28%.

Embodiment 2

[0058] A preparation method of a lithium carbon fluoride battery positive pole piece:

[0059] (1) The fluorocarbon material (CF 0.99 ), binder (PVDF), conductive agent (SP), chloride (KCl) and solvent (NMP) are mixed, wherein the mass ratio of fluorocarbon material: binder: conductive agent: chloride is 94.95:3: 2:0.05, the obtained viscosity is the positive electrode slurry of 17000MPa;

[0060] (2) Coating the positive electrode slurry on the current collector (aluminum foil) with a coating thickness of 150 μm, then adjusting the rolling temperature to 150° C. and the rolling pressure to 30 tons to obtain a compacted density of 1.4 g / cm 3 , to obtain a lithium carbon fluoride battery cathode sheet with a porosity of 48%.

Embodiment 3

[0062] A preparation method of a lithium carbon fluoride battery positive pole piece:

[0063] (1) The fluorocarbon material (CF 0.99 ), binder (PVDF), conductive agent (SP), chloride (KCl) and solvent (NMP) are mixed, wherein the mass ratio of fluorocarbon material: binder: conductive agent: chloride is 94.95:3: 2:0.05, the obtained viscosity is the positive electrode slurry of 17000MPa;

[0064] (2) Coat the positive electrode slurry on the current collector (aluminum foil) with a coating thickness of 150 μm, then adjust the rolling temperature to 61° C., and the rolling pressure to 50 tons to obtain a compacted density of 1.4 g / cm 3 , to obtain a lithium carbon fluoride battery cathode sheet with a porosity of 31%.

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Abstract

The invention relates to a lithium carbon fluoride battery positive pole piece, a preparation method thereof and a lithium carbon fluoride battery. The porosity of the lithium carbon fluoride battery positive pole piece is greater than or equal to 15%. The porosity and the compaction density of the lithium carbon fluoride battery positive pole piece are within the range, so that the lithium carbon fluoride battery positive pole piece has excellent electrochemical properties: 1, the contact between the positive pole piece and an electrolyte is facilitated, and the capacity exerting rate of a positive pole material is improved; 2, the positive pole piece of the lithium carbon fluoride battery can reduce the voltage hysteresis phenomenon at the initial discharge stage of the battery; meanwhile, the lithium carbon fluoride battery is assembled by adopting the lithium carbon fluoride battery positive pole piece disclosed by the invention, so that the liquid absorption time of the pole piece can be effectively shortened, and the preparation process time is shortened; the lithium carbon fluoride battery positive pole piece can meet the requirements of various batteries such as winding, lamination and the like, and is wide in application range.

Description

technical field [0001] The invention belongs to the technical field of lithium fluoride batteries, and in particular relates to a lithium fluoride battery positive pole piece, a preparation method thereof and a lithium fluoride battery. Background technique [0002] With the rapid development of society, environmental pollution and shortage of traditional energy, people need more efficient and environmentally friendly energy to replace or supplement traditional energy, which leads to more and more demand for hybrid electric vehicles and pure electric vehicles. Batteries, as the heart of electric vehicles, are the focus of current research. Lithium-ion power batteries were once considered to be the most potential power batteries for electric vehicles; however, with the development of nickel, cobalt, lithium and other precious metals, the raw materials of lithium-ion power batteries The sharp rise has restricted the promotion and application of new energy vehicles; the poor sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/08H01M4/58H01M6/06
CPCH01M4/08H01M4/582H01M4/0435H01M6/06
Inventor 赖江洪李琦旸袁中直刘建华刘金成
Owner EVE ENERGY CO LTD
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