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Lithium ion battery positive electrode material, lithium ion battery and preparation method of lithium ion battery

A technology of lithium-ion batteries and positive electrode materials, applied in battery electrodes, electrolyte storage battery manufacturing, secondary batteries, etc., can solve problems such as poor safety, high cost, and general cycle performance, and achieve low cost, high specific capacity, and high operating voltage wide range of effects

Inactive Publication Date: 2018-06-19
BEIJING NAT BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The performance of lithium-ion batteries mainly depends on the positive and negative electrode materials. The positive electrode material of ternary lithium-ion batteries LiNi x co 1-x o 2 (0

Method used

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  • Lithium ion battery positive electrode material, lithium ion battery and preparation method of lithium ion battery
  • Lithium ion battery positive electrode material, lithium ion battery and preparation method of lithium ion battery

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preparation example Construction

[0045] In a third aspect, in at least one embodiment, a method for preparing the above-mentioned lithium-ion battery is provided, comprising the following steps: (a) respectively coating the positive electrode slurry and the negative electrode slurry containing the positive electrode material of the lithium-ion battery on Both sides of the positive electrode current collector and the negative electrode current collector are then dried and compacted to form positive and negative electrode sheets;

[0046] (b) Cutting the positive electrode sheet and the negative electrode sheet into the required size respectively and assembling them into batteries;

[0047] (c) Putting the battery cells into the case, injecting electrolyte into the case, sealing the case, and finally performing formation and volume separation to obtain the lithium-ion battery.

[0048] The preparation method of the lithium-ion battery is simple, scientific and reasonable, and the prepared lithium-ion battery ha...

Embodiment 1

[0059] A lithium-ion battery cathode material, mainly composed of LiNi 0.05 co 0.95 o 2 Composite with lithium iron phosphate, the quality of lithium iron phosphate is LiNi 0.05 co 0.95 o 2 15%.

Embodiment 2

[0061] A lithium-ion battery cathode material, mainly composed of LiNi 0.05 co 0.95 o 2 Composite with lithium iron phosphate, the quality of lithium iron phosphate is LiNi 0.05 co 0.95 o 2 20% of.

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Abstract

The invention relates to the field of lithium ion batteries, and particularly provides a lithium ion battery positive electrode material, a lithium ion battery and a preparation method of the lithiumion battery . The lithium ion battery positive electrode material is prepared by compounding LiNi0.05Co0.95O2 and lithium iron phosphate, and the mass of the lithium iron phosphate is 15 to 50 percentof LiNi0.05Co0.95O2. The lithium ion battery positive electrode material is mainly prepared by compounding the LiNi0.05Co0.95O2 of a specific content and lithium iron phosphate, the positive electrode material integrates the advantages of the LiNi0.05Co0.95O2 and the lithium iron phosphate and overcomes the weaknesses of the LiNi0.05Co0.95O2 and the lithium iron phosphate. The positive electrodematerial can increase the range of application voltage of a battery, can increase the specific capacity of the battery, can prolong the cycling life of the battery, and is low in cost due to richer source of raw materials.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a lithium ion battery cathode material, a lithium ion battery and a preparation method thereof. Background technique [0002] Lithium-ion battery is a new type of green chemical power source. Compared with traditional nickel-cadmium batteries and nickel-hydrogen batteries, it has the advantages of high voltage, long life and high energy density. With the continuous update and development of lithium battery technology, its advantages of light weight, high capacity and long life are gradually favored by consumers. The lithium battery market has expanded from mobile phones to cameras, DVDs, aviation films, toys and other fields. In recent years, lithium-ion batteries have been widely used not only in portable electronic devices, but also in large and medium-sized electric devices such as electric vehicles, electric bicycles, and electric tools due to their advantages such as hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/58H01M4/62H01M10/0525H01M10/058
CPCH01M4/364H01M4/366H01M4/525H01M4/5825H01M4/625H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 苏凯乔乔陆文宁
Owner BEIJING NAT BATTERY TECH