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Method for stably preparing high-nickel ternary battery electrode material by doping in advance

A ternary lithium battery and electrode material technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor processing stability and difficult control of high-nickel ternary materials, so as to overcome poor processing stability and prevent doping. Phase separation, the effect of simplifying the preparation process

Inactive Publication Date: 2018-08-28
CHENDU NEW KELI CHEM SCI CO LTD
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Problems solved by technology

[0013] The purpose of the present invention is to provide a method for stably preparing high-nickel ternary lithium battery electrode materials by pre-doping, which overcomes the defects of poor processing stability and difficult control of high-nickel ternary materials

Method used

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  • Method for stably preparing high-nickel ternary battery electrode material by doping in advance

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Embodiment 1

[0036] A method for predoping and stably preparing electrode materials for high-nickel ternary lithium batteries. First, take a mass concentration of 60% nickel sulfate solution, 65% cobalt sulfate solution, and 80% sulfuric acid in a molar ratio of 8:1:1. Manganese solution, then Mg-Al-F is mixed into nickel sulfate solution, the mass fraction of Mg-Al-F doped nickel sulfate solution is 15%, Ti-F is mixed into manganese sulfate solution, cobalt sulfate solution, Ti-F The mass fractions of doped manganese sulfate solution and cobalt sulfate solution are 10% and 5% respectively, and the doped nickel sulfate solution is maintained in ammonia water with a mass concentration of 60%, and the doped manganese sulfate solution and cobalt sulfate solution are maintained in three Conservation in ethanolamine; Put the doped solution into polyacrylamide-graphene colloid respectively to form a colloid, the doped nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution an...

Embodiment 2

[0038] A method for predoping and stably preparing electrode materials for high-nickel ternary lithium batteries. First, take a mass concentration of 60% nickel sulfate solution, 70% cobalt sulfate solution, and 80% sulfuric acid in a molar ratio of 8:1:1. Manganese solution, then Mg-Al-F is mixed into nickel sulfate solution, the mass fraction of Mg-Al-F doped nickel sulfate solution is 20%, Ti-F is mixed into manganese sulfate solution, cobalt sulfate solution, Ti-F The mass fractions of doped manganese sulfate solution and cobalt sulfate solution are 10% and 5% respectively, and the doped nickel sulfate solution is maintained in ammonia water with a mass concentration of 60%, and the doped manganese sulfate solution and cobalt sulfate solution are maintained in three Conservation in ethanolamine; Put the doped solution into polyacrylamide-graphene colloid respectively to form a colloid, the doped nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution an...

Embodiment 3

[0040] A method for predoping and stably preparing electrode materials for high-nickel ternary lithium batteries. First, take a mass concentration of 75% nickel sulfate solution, 70% cobalt sulfate solution, and 82% sulfuric acid in a molar ratio of 8:1:1. Manganese solution, then Mg-Al-F is mixed into nickel sulfate solution, the mass fraction of Mg-Al-F doped nickel sulfate solution is 20%, Ti-F is mixed into manganese sulfate solution, cobalt sulfate solution, Ti-F The mass fractions of doped manganese sulfate solution and cobalt sulfate solution are 12% and 8% respectively, and the doped nickel sulfate solution is maintained in ammonia water with a mass concentration of 70%, and the doped manganese sulfate solution and cobalt sulfate solution are maintained in three Conservation in ethanolamine; Put the doped solution into polyacrylamide-graphene colloid respectively to form a colloid, the doped nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution an...

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Abstract

The invention belongs to the field of a lithium battery and provides a method for stably preparing a high-nickel ternary battery electrode material by doping in advance. The method comprises the following steps: weighing nickel sulfate, cobalt sulfate and manganese sulfate solutions separately according to the molar ratio of nickel to cobalt to manganese being 8:1:1, doping Mg-Al-F into the nickelsulfate, doping Ti-F into the manganese sulfate and the cobalt sulfate, performing maintenance in ammonia water and triethanolamine correspondingly, and putting into polyacrylamide-graphene colloid separately to form jellies; and mixing the three jellies through a high-pressure jet machine, spraying a lithium source while mixing and forming a spherical high-nickel ternary material by utilizing laser sintering. By the method, the defects that the high-nickel ternary material has low processing stability and is difficult to control are overcome, the defects that alkali liquid is added and sodium ions are introduced are avoided, and the preparation flow is simplified.

Description

technical field [0001] The invention belongs to the field of lithium batteries, in particular to a method for stably preparing high-nickel ternary lithium battery electrode materials through pre-doping. Background technique [0002] A lithium battery is a primary battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. It is different from a rechargeable battery. Lithium-ion batteries are different from lithium-ion polymer batteries. The inventor of the lithium battery is Edison. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of microelectronics technology at the end of the 20th century, miniaturized equipment is increasing day by day, which puts forward high requirements for power supply. Lithium batteries have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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