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Electric vehicle power battery material

A technology for power batteries and electric vehicles, which is applied in the direction of batteries, battery electrodes, secondary batteries, etc., can solve the problems of large volume of power lithium-ion batteries, poor safety performance, and high price of power lithium-ion batteries. The effect of good identity, moderate cost and high voltage platform

Inactive Publication Date: 2016-03-02
WUHU KAIER ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The development of high-energy power lithium-ion batteries is urgent, and power lithium-ion batteries are expensive, and power-type lithium-ion batteries are relatively large in size, and their safety performance will also deteriorate accordingly
It can be seen that price and safety performance are the main bottlenecks of lithium-ion batteries as power batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The lithium iron phosphate and lithium vanadium phosphate composite material of the cathode material, the conductive agent, and the binder have a mass ratio of 91:5:4.

[0023] The carbon composite material of the core-shell structure of the negative electrode material, the conductive agent, and the binder have a mass ratio of 93:2:5.

[0024] The molar ratio of lithium iron phosphate and lithium vanadium phosphate of the lithium iron phosphate and lithium vanadium phosphate composite material is 2:1.

Embodiment 2

[0026] The lithium iron phosphate and lithium vanadium phosphate composite material of the cathode material, the conductive agent, and the binder have a mass ratio of 93:3:4.

[0027] The carbon composite material of the core-shell structure of the negative electrode material, the conductive agent, and the binder have a mass ratio of 95:1:4.

[0028] The molar ratio of lithium iron phosphate and lithium vanadium phosphate of the lithium iron phosphate and lithium vanadium phosphate composite material is 2:3.

Embodiment 3

[0030] The lithium iron phosphate and lithium vanadium phosphate composite material of the cathode material, the conductive agent, and the binder have a mass ratio of 95:2:3.

[0031] The carbon composite material of the core-shell structure of the negative electrode material, the conductive agent, and the binder have a mass ratio of 96:2:2.

[0032] The molar ratio of lithium iron phosphate and lithium vanadium phosphate of the lithium iron phosphate and lithium vanadium phosphate composite material is 2:5.

[0033] The negative electrode material of the battery in the above embodiment adopts a carbon composite material with a core-shell structure modified by graphite, which has high reversible capacity, low potential platform, good homogeneity with the solvent, and good high current performance. The coated lithium iron phosphate and lithium vanadium phosphate composite material has good stability, good cycle performance, good charge-discharge platform, good three-dimensional...

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Abstract

The invention aims to provide an electric vehicle power battery material. A core-shell structure carbon composite material modified by graphite is adopted as an anode material for batteries, and has high reversible capacity, low potential platform, high similarity with a solvent, high large-current performance and the like; a carbon-encapsulated lithium iron phosphate and lithium vanadium phosphate composite material is adopted as a cathode material for batteries, and has high stability, good cycle performance, good charging and discharging platform, good ionic conductivity for three-dimensional ion channels, high voltage platform and moderate cost; and the electric vehicle power battery material is excellent in performance, and is suitable for electric vehicle power batteries.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a power battery material for electric vehicles. Background technique [0002] The development of high-energy power lithium-ion batteries is urgent, the power lithium-ion batteries are expensive, and the power-type lithium-ion batteries are larger in size, and the safety performance will be correspondingly worse. It can be seen that price and safety performance are the main bottlenecks of lithium-ion batteries as power batteries. Graphite has become the preferred material for the negative electrode material of lithium-ion batteries due to its low price and good safety. As a lithium-ion battery for electric vehicles, more stringent performance requirements are put forward for the materials used, such as high performance requirements. Safety, high rate discharge, long cycle life and good process adaptability therefore require modification of graphite. Lithium iron phosphate has hi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/5825H01M4/622H01M4/625H01M10/0525H01M2220/20Y02E60/10
Inventor 汪桂云汪劲松王鸣
Owner WUHU KAIER ELECTRICAL TECH
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