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Method for preparing plus plate material of lithium ion battery by combustion method

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve problems such as unstable electrochemical performance, uneven mixing of reactants, and high price of organic solvents, and achieve good electrochemical cycles Performance, excellent electrochemical performance, complete reaction effect

Inactive Publication Date: 2009-04-29
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-phase method has high energy consumption, uneven mixing of reactants, irregular product morphology, and unstable electrochemical performance
The liquid phase method is complex in process, long in reaction time, and the price of the organic solvent used makes the production cost high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation of LiCoO cathode material for lithium-ion batteries 2 The method: mix 0.51mol (35.2g) lithium nitrate and 0.51mol (148.4g) cobalt nitrate hexahydrate and dissolve it completely with 1M nitric acid aqueous solution; add 61.3g glycine under constant stirring, and heat up to 200°C until The solution becomes viscous; the viscous mixture is placed in a muffle furnace, and rapid spontaneous combustion occurs at 600 ° C; roasting and crystallizing at 600 ° C for 4 hours, LiCoO can be obtained 2 Lithium-ion battery cathode material. The resulting lithium-ion battery cathode material LiCoO 2 It is a black powder, identified as a pure phase by X-ray diffraction, the Li content in the product is 7.0%, the Co content is 60.4%, the specific capacity is 140mAh / g, and the charge-discharge efficiency still reaches 100.0% when the charge-discharge cycle is 20 times.

Embodiment 2

[0032] A kind of preparation lithium-ion battery cathode material LiCo 0.8 Ni 0.2 o 2 The method: mix 0.61mol (62.6g) lithium acetate dihydrate, 0.49mol (121.6g) cobalt acetate tetrahydrate and 0.12mol (35.5g) nickel nitrate hexahydrate, and dissolve it completely with 1M aqueous nitric acid solution, Add 110.0g of glycine under continuous stirring, and heat up to 150°C under constant stirring until the solution becomes viscous; put the viscous mixture in a muffle furnace, and it will spontaneously ignite rapidly at 600°C; roast and crystallize at 700°C for 6 hours, You can get LiCo 0.8 Ni 0.2 o 2 Lithium-ion battery cathode material. The obtained lithium ion battery cathode material LiCo 0.8 Ni 0.2 o 2 It is a black powder, identified as a pure phase by X-ray diffraction, the Li content in the product is 7.2%, the Co content is 47.9%, the Ni content is 11.9%, the specific capacity is 160mAh / g, and the charge-discharge efficiency is still 99.8% when the charge-discharg...

Embodiment 3

[0034] A kind of preparation lithium-ion battery cathode material LiCo 1 / 3 Ni 1 / 3 mn 1 / 3 o 2 The method: mix 1.04mol (71.7g) lithium nitrate, 0.35mol (87.2g) cobalt acetate tetrahydrate, 0.35mol (87.1g) nickel acetate tetrahydrate and 0.35mol (100.5g) manganese nitrate hexahydrate, and mix them Dissolve completely with 1M nitric acid aqueous solution, add 313.6g of glycine with constant stirring, and raise the temperature to 150°C with constant stirring until the solution becomes viscous; put the viscous mixture in a muffle furnace, and it will spontaneously ignite rapidly at 600°C ; Calcination and crystallization at 800°C for 8 hours to obtain LiCo 1 / 3 Ni 1 / 3 mn 1 / 3 o 2 Lithium-ion battery cathode material. The obtained lithium ion battery cathode material LiCo 1 / 3 Ni 1 / 3 mn 1 / 3 o 2 It is a blue-black powder, identified as a pure phase by X-ray diffraction, the Li content in the product is 7.1%, the Co content is 20.2%, the Ni content is 20.2%, the Mn content is 1...

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Abstract

A method for preparing positive electrode material of lithium cell by ignition includes mixing relevant transition metal with soluble salt material of lithium as per chemical metering ratio and dissolving mixed material by aqueous solution of nitric acid, adding certain amount of organic acid then agitating continuously under heating condition, making prepared material be quickly self-ignited under temperature of 600deg.c and baking self-ignited material under temperature of 600-800deg.c for 4-8 hours for obtaining positive electrode material of lithium cell.

Description

technical field [0001] The invention relates to the preparation of a battery positive electrode material, in particular to a lithium ion battery positive electrode material and a preparation method thereof. Background technique [0002] Lithium-ion battery refers to Li + The secondary battery in which the insertion compound is the positive and negative electrodes is different from the lithium battery that uses metallic lithium as the negative electrode, and has excellent reversible performance and safety of charge and discharge. Lithium-ion batteries have high operating voltage, high energy density, good safety performance, small self-discharge, fast charging and discharging, can be made into large-capacity battery packs, and are memory-free batteries. With the miniaturization of modern electrical appliances and the need for high energy, lithium-ion batteries with light weight, small size, high specific energy, high voltage, and low pollution will become good power sources ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/48H01M4/04C01D15/00C01G1/02C01G51/00C01G45/00C01G53/00C04B35/622B01J19/00
CPCY02E60/12Y02E60/10
Inventor 贾永忠姚颖景燕孙进贺
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI