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High-safety ultralong-life lithium ion battery, and positive pole material and formation method thereof

A lithium-ion battery and cathode material technology, which is applied in the design and manufacture of lithium-ion secondary batteries, can solve problems such as battery casing rupture, battery impedance increase, safety accidents, etc., and achieves suppression of gas production, reduction of gas production, High security effect

Active Publication Date: 2014-01-22
SHANGHAI ELECTRICAL GUOXUAN NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it was found in the research that traditional lithium titanate / lithium manganese oxide batteries tend to generate gas during the cycle, which leads to increased battery impedance, rapid performance decay, and even when the internal pressure of the battery reaches a certain level, the battery shell is damaged. Body rupture, safety accident
This fatal shortcoming has cast an indelible shadow on the bright development prospects of lithium-ion batteries of the lithium titanate / lithium manganate system.

Method used

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  • High-safety ultralong-life lithium ion battery, and positive pole material and formation method thereof
  • High-safety ultralong-life lithium ion battery, and positive pole material and formation method thereof
  • High-safety ultralong-life lithium ion battery, and positive pole material and formation method thereof

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Embodiment 1

[0038] Nickel cobalt lithium manganese oxide LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 and alumina Al 2 o 3As the main and auxiliary additives respectively, lithium manganate and the main and auxiliary additives are mixed according to the ratio of 90%, 9% and 1% by mass to form the main active material, and the main active material is mixed with Supper P and polyvinylidene fluoride according to After mixing in a weight ratio of 92:4:4, dissolve it in N-methylpyrrolidone, stir evenly to make positive electrode slurry, and then perform coating, drying, rolling, and cutting according to the conventional lithium-ion battery manufacturing process. Form a positive electrode sheet; mix lithium titanate, Supper P, and polyvinylidene fluoride in a weight ratio of 92:4:4, dissolve in N-methylpyrrolidone, stir evenly to make a negative electrode slurry, and then use conventional lithium The ion battery manufacturing process is coated, dried, rolled, and cut to make negative electrodes; the positiv...

Embodiment 2

[0040] Nickel cobalt lithium manganese oxide LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Lithium manganate and calcium oxide CaO are used as the main and auxiliary additives respectively. Lithium manganate is mixed with the main and auxiliary additives according to the mass percentage of 90%, 8%, and 2% to form the main active material. The main active material is mixed with Supper P, poly Vinylidene fluoride is mixed according to the weight ratio of 92:4:4, dissolved in N-methylpyrrolidone, stirred evenly to make positive electrode slurry, and then coated, dried, and rolled according to the conventional lithium-ion battery manufacturing process , cutting to make a positive electrode sheet; mixing lithium titanate with Supper P and polyvinylidene fluoride in a weight ratio of 92:4:4, dissolving in N-methylpyrrolidone, stirring evenly to make a negative electrode slurry, and then According to the conventional lithium-ion battery manufacturing process, it is coated, dried, rolled, and cut to ...

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Abstract

The invention relates to a main active material used as a lithium ion battery positive pole and a battery formation method. The main active material in the positive pole comprises spinel structure lithium manganate LiMn2O4, main additive nickel-containing lithium transition metal oxide, and subadditive alkaline metal or non-metal oxide. The high-safety ultralong-life lithium ion battery is prepared from the positive pole, a negative pole and a diaphragm by a lamination or coiling technique, wherein the active material of the negative pole is lithium titanate, and the battery is prepared by a specific formation method. The invention is characterized in that after the main additive nickel-containing lithium transition metal oxide and subadditive alkaline metal or non-metal oxide are added into the lithium manganate and subjected to specific formation, the aerogenesis phenomenon of the battery can be effectively inhibited in the use process, and the problem of inflation of the battery is solved, thereby maximally displaying the advantages of high safety and ultralong life of the material.

Description

technical field [0001] The present invention relates to a lithium ion battery positive electrode material, a positive electrode made of the material, a battery containing the positive electrode, and a method for forming the battery, in particular to a lithium ion secondary battery for power and energy storage applications. Design and manufacture of batteries. Background technique [0002] Lithium-ion batteries are a new generation of green high-energy rechargeable batteries that developed rapidly in the early 1990s after nickel-metal hydride batteries. It has the advantages of high single voltage, high energy density, low self-discharge rate, high charge and discharge efficiency, long cycle life, no memory effect and environmental friendliness, and has become the leading supporting product for portable electronic products such as mobile phones, digital cameras, and notebook computers. Power supply, and began to emerge in the power supply of electric bicycles and electric ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525H01M10/42H01M10/44
CPCH01M4/131H01M4/364H01M4/505H01M4/525H01M10/0525H01M10/058H01M10/42H01M10/44Y02E60/10
Inventor 李佳蒿豪姚一一刘佳丽廖文俊曾乐才
Owner SHANGHAI ELECTRICAL GUOXUAN NEW ENERGY TECH CO LTD
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