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All-solid-state film lithium ion battery related target material and manufacturing method thereof

A technology of target material and hot pressing method, which is applied to all-solid-state thin film lithium-ion battery related target material and its manufacturing field, can solve the problems of high price and low capacity, reduce production time, increase energy storage and cycle times, and avoid The effect of stress relief

Inactive Publication Date: 2012-12-19
苏州晶纯新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on LiCoO2 is relatively mature and has excellent comprehensive performance, but it is expensive, has low capacity, and has certain safety problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using LiCoO2 with an average particle size of 100nm and a purity of 99.95% as a raw material, the agglomeration in the powder is removed by grinding and sieving. Graphite mold is used, and molybdenum foil is used as the isolation material between the mold and the target, and the upper and lower surfaces are protected by molybdenum foil. Preload 3MPa, vacuum to 10 -3 Pa, heated to 400°C at a speed of 10°C / min, kept for 1 hour, and filled with argon. Pressurize to 10MPa, then heat to 600°C at a heating rate of 15°C / min, and hold for 1 hour to ensure uniform temperature distribution in the mold cavity. Finally, heat up to 900°C at a heating rate of 10°C / min, keep it warm for 1 hour, increase the pressure by 5MPa every 50°C during the temperature rising process, and the final pressure is 20MPa. After the heat preservation is completed, turn off the heating system, keep the pressure and cool with the furnace. Take out the target, remove the molybdenum foil protective laye...

Embodiment 2

[0034] Using Li3PO4 with an average particle size of 100nm and a purity of 99.95% as a raw material, the agglomeration in the powder is removed by grinding and sieving. Graphite mold is used, and molybdenum foil is used as the isolation material between the mold and the target, and the upper and lower surfaces are protected by molybdenum foil. Preload 3MPa, vacuum to 10 -3Pa, heated to 400°C at a speed of 10°C / min, kept for 1 hour, and filled with argon. Pressurize to 10MPa, then heat to 600°C at a heating rate of 15°C / min, and hold for 1 hour to ensure uniform temperature distribution in the mold cavity. Finally, heat up to 750°C at a heating rate of 10°C / min, keep it warm for 1 hour, and increase the pressure by 5MPa every 50°C during the temperature rising process, and the final pressure is 20MPa. After the heat preservation is completed, turn off the heating system, keep the pressure and cool with the furnace. Take out the target, remove the molybdenum foil protective l...

Embodiment 3

[0039] Using LiFePO4 with an average particle size of 100nm and a purity of 99.95% as a raw material, the agglomeration in the powder is removed by grinding and sieving. Graphite mold is used, and molybdenum foil is used as the isolation material between the mold and the target, and the upper and lower surfaces are protected by molybdenum foil. Preload 3MPa, vacuum to 10 -3 Pa, heated to 400°C at a speed of 10°C / min, kept for 1 hour, and filled with argon. Pressurize to 10MPa, then heat to 600°C at a heating rate of 15°C / min, and hold for 1 hour to ensure uniform temperature distribution in the mold cavity. Finally, heat up to 750°C at a heating rate of 10°C / min and keep the temperature for 1 hour. During the temperature rise process, the pressure is increased by 5MPa every 50°C, and the final pressure is 20MPa. After the heat preservation is completed, turn off the heating system, keep the pressure and cool with the furnace. Take out the target, remove the molybdenum foil ...

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Abstract

The invention relates to an all-solid-state film lithium ion battery related target material and a manufacturing method thereof. The method mainly comprises the following steps: material selection, processing before sintering, hot-pressing sintering, target material post-processing, and the like, and the manufactured target materials comprise LiCoO2, LiFePO4, Li3PO4, etc. The method uses a graphite mold, adopts molybdenum foil as a separating material of the mold and the target material, and both the upper and the lower surfaces of the mold are protected by the molybdenum foil. The method comprises: prepressing at 1-5 MPa, performing vacuumization to 10-3 Pa, heating with a heating rate of 10-15 DEG C / min to reach 100-400 DEG C, performing heat preservation for 0.5-1 h, and injecting argon; heating with a heating rate of 10-15 DEG C / min to reach 400-1000 DEG C, heating gradually, performing pressurization to obtain a final sintering pressure of 20-60 MPa, and performing heat preservation for 1-5 h; keeping the pressure and cooling in the furnace, removing the product and grinding off the surface layer. The method can obtain a high-purity highly-dense target material for an all-solid-state film lithium ion battery, and the process design is simple and practical, and has low cost.

Description

technical field [0001] The invention prepares materials LiCoO2, LiFePO4, Li3PO4, etc. used in all-solid-state thin-film lithium ion batteries, and the method can prepare high-purity, high-density LiCoO2, LiFePO4, Li3PO4 sputtering targets. Under appropriate conditions, sputtering these targets can yield thin films with excellent properties, thereby improving the energy storage and cycle times of all-solid-state thin-film lithium-ion batteries. Background technique [0002] The rapid development of miniaturization of electronic devices such as sensors, MEMS, and CMOS chips requires a miniature and compact power supply with small size, light weight, and high specific capacity to match it. All-solid-state thin-film lithium-ion batteries have been widely used at home and abroad in recent years because of their high power density, low self-discharge rate, excellent charge-discharge cycle performance, arbitrary design of shape and size, no solution leakage, no explosion, and safe ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/34C23C14/08
Inventor 王广欣钟小亮
Owner 苏州晶纯新材料有限公司
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