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Cobalt-free nickel-free positive electrode material and preparation method thereof and battery

A nickel positive electrode and battery technology, applied in cobalt-free and nickel-free positive electrode materials, its preparation method and battery field, can solve the problems of restricting battery cost and environmental hazards

Active Publication Date: 2021-07-06
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of the new energy market, due to the advantages of high energy density, high cycle and high safety, ternary cathode materials have attracted much attention. In the current power market, such as large-scale commercialization of NCM523 and NCM622 Ternary materials such as ternary materials can meet the needs of power vehicles to a certain extent, but their mileage and safety performance still need to be improved. In addition, the price of cobalt and nickel in NCM continues to rise, which restricts the cost of batteries, and cobalt metal is easy to use. environmental hazard

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  • Cobalt-free nickel-free positive electrode material and preparation method thereof and battery
  • Cobalt-free nickel-free positive electrode material and preparation method thereof and battery
  • Cobalt-free nickel-free positive electrode material and preparation method thereof and battery

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Embodiment 1

[0051] This embodiment provides a method for preparing a cobalt-free and nickel-free cathode material, and the preparation method specifically includes the following steps:

[0052] (I) Mixing lithium carbonate, sodium carbonate and manganese carbonate, the molar ratio of lithium element, sodium element and manganese element is 0.25:1:0.75, in an air atmosphere, heating at 750 ° C for 10h to prepare the cobalt-free and nickel-free Matrix material, the general formula is NaLi 0.25 Mn 0.75 O 2 , the air flow is 7.5L / min;

[0053] (II) The cobalt-free and nickel-free base material prepared in step (I), lithium carbonate and MnO are mixed to obtain a mixture, the molar ratio of lithium element and manganese element in the mixture is 1.2:1, and the melting reaction is carried out at 600 ° C for 6 hours, Add water to the reacted material and stir and wash for 10min, the quality of the added water is twice the quality of the material, and dry after washing;

[0054] (III) The dri...

Embodiment 2

[0057] This embodiment provides a method for preparing a cobalt-free and nickel-free positive electrode material, and the preparation method specifically includes the following steps:

[0058] (I) Mixing lithium hydroxide, sodium acetate and manganese monoxide, the molar ratio of lithium element, sodium element and manganese element is 0.25:1:0.75, in an air atmosphere, heating at 500 ℃ for 12h to prepare the cobalt-free Nickel-free base material, the general formula is NaLi 0.25 Mn 0.75 O 2, the air flow is 5L / min;

[0059] (II) The cobalt-free and nickel-free base material prepared in step (I), lithium hydroxide and Mn 3 O 4 Mixing to obtain a mixture, the molar ratio of lithium element and manganese element in the mixture is 0.9:1, and the melting reaction is carried out at 400 ° C for 8 hours. Water is added to the reacted material and stirred and washed for 10 minutes. The mass of water added is twice the mass of the material. , washed and dried;

[0060] (III) The ...

Embodiment 3

[0063] This embodiment provides a method for preparing a cobalt-free and nickel-free positive electrode material, and the preparation method specifically includes the following steps:

[0064] (I) Lithium chloride, sodium chloride and manganese trioxide are mixed, the molar ratio of lithium element, sodium element and manganese element is 0.25:1:0.75. Cobalt-free and nickel-free base material, the general formula is NaLi 0.25 Mn 0.75 O 2 , the air flow is 10L / min;

[0065] (II) The cobalt-free and nickel-free base material prepared in step (I), lithium chloride and MnCO 3 Mixing to obtain a mixture, the molar ratio of lithium element and manganese element in the mixture is 1.5:1, and the melting reaction is carried out at 800 ° C for 4 hours. Water is added to the reacted material and stirred and washed for 10 minutes. The mass of water added is twice the mass of the material. , washed and dried;

[0066] (III) The dried cobalt-free and nickel-free cathode material is fir...

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Abstract

The invention provides a cobalt-free and nickel-free positive electrode material and a preparation method thereof and a battery. The preparation method comprises the following steps: preparing a cobalt-free and nickel-free matrix material, mixing the cobalt-free and nickel-free matrix material, a lithium source and a bivalent manganese compound, and carrying out a reaction to prepare the cobalt-free and nickel-free positive electrode material. According to the invention, the bivalent manganese compound is added in the preparation process, so that generation of layered LiMnO2 and generation of spinel LiMn2O4 are effectively inhibited, generation of layered Li2MnO3 is promoted, and the cycle performance is improved in the cycle process; and the preparation method has the advantages of being simple in preparation process, low in cost, small in pollution, high in cycle performance and the like.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a cobalt-free and nickel-free positive electrode material, in particular to a cobalt-free and nickel-free positive electrode material, a preparation method thereof and a battery. Background technique [0002] With the development of the new energy market, ternary cathode materials have attracted much attention due to their advantages of high energy density, high cycle and high safety. In the current power market, such as large-scale commercialized NCM523 and NCM622 Such ternary materials can meet the needs of power vehicles to a certain extent, but their cruising range and safety performance still need to be improved. In addition, the continued increase in the prices of cobalt and nickel elements in NCM restricts the cost of batteries, and cobalt metal is easy to use. harm to the environment. SUMMARY OF THE INVENTION [0003] In view of the deficiencies in the prior art, the p...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/58H01M4/62H01M10/052H01M10/0525C01B25/36C01G23/00C01G45/12
CPCH01M4/364H01M4/366H01M4/505H01M4/485H01M4/5825H01M4/628H01M10/052H01M10/0525C01G45/1257C01G45/1214C01B25/36C01G23/005H01M2220/20H01M2004/028C01P2004/80C01P2006/40Y02E60/10H01M4/483H01M4/525H01M4/1391H01M4/0471H01M4/36H01M4/131H01M4/62C01G45/1221C01G45/1228C01G45/1242C01P2002/32C01P2002/72C01P2004/03C01P2004/20
Inventor 王鹏飞杨红新李子郯乔齐齐施泽涛郭丰许鑫培
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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