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A lithium carbon fluoride battery positive pole piece, its preparation method and lithium carbon fluoride battery

A lithium carbon fluoride battery and positive pole piece technology, which is applied in the direction of primary battery electrodes, battery electrodes, electrode manufacturing, etc., can solve problems such as complex processes, achieve a wide range of applications, reduce liquid absorption time, and shorten preparation process time Effect

Active Publication Date: 2022-03-11
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • A lithium carbon fluoride battery positive pole piece, its preparation method and lithium carbon fluoride battery
  • A lithium carbon fluoride battery positive pole piece, its preparation method 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 10000MPas;

[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 17000MPas;

[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 17000MPas;

[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 fluoride carbon battery. The porosity of the positive electrode sheet of the lithium fluoride battery is ≥ 15%. The porosity and compaction density of the lithium carbon fluoride battery positive pole piece of the present invention are within this range, so that the lithium carbon fluoride battery positive pole piece of the present invention has excellent electrochemical properties: 1. It is beneficial to the positive pole piece Contact with the electrolyte improves the capacity utilization rate of the positive electrode material; 2. The positive pole piece of the lithium carbon fluoride battery of the present invention can reduce the voltage hysteresis phenomenon at the initial stage of battery discharge; at the same time, the positive electrode of the lithium carbon fluoride battery of the present invention The pole pieces are assembled into a lithium carbon fluoride battery, which can effectively reduce the liquid absorption time of the pole piece and shorten the preparation process time; the lithium carbon fluoride battery positive pole piece of the present invention can be applied to various batteries such as winding and stacking. requirements, a wide range of applications.

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 Patents(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