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A kind of anode material for lithium battery and preparation method thereof

A lithium battery anode and lithium phosphate technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor cycle and rate performance, and achieve good cycle stability and rate performance

Active Publication Date: 2020-06-30
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are many reports on nickel ferrite as anode material, but the cycle and rate performance are poor.

Method used

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  • A kind of anode material for lithium battery and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] LiPON coated NiFe 2 o 4 The film is prepared by pulsed laser deposition and magnetron sputtering. The specific steps are:

[0023] First prepare NiFe 2 o 4 film, the NiFe 2 o 4 The target used for pulsed laser deposition is made by pressing the sheet. The 248nm pulsed laser wave generated by the laser is focused by the lens and then incident on the NiFe 2 o 4 On target, NiFe 2 o 4 The distance between the target and the substrate is 50mm. The substrate is a platinum-coated single crystal silicon wafer. NiFe is deposited on the substrate in an oxygen atmosphere. 2 o 4 Thin film, the substrate is made of stainless steel, the substrate temperature is 650°C, and the energy density is 2.5j / cm 2 , the deposition time was 0.5 h.

[0024] Then prepare the LiPON thin film, press the powder of lithium phosphate into a lithium phosphate target for magnetron sputtering, and deposit NiFe 2 o 4 The substrate of the thin film is transferred to the magnetron sputtering equ...

Embodiment 2

[0029] LiPON coated NiFe 2 o 4 The film is prepared by pulsed laser deposition and magnetron sputtering. The specific steps are:

[0030] First prepare NiFe 2 o 4 film, the NiFe 2 o 4 The target used for pulsed laser deposition is made by pressing the sheet. The 248nm pulsed laser wave generated by the laser is focused by the lens and then incident on the NiFe 2 o 4 On target, NiFe 2 o 4 The distance between the target and the substrate is 40mm, the substrate is a stainless steel sheet, and NiFe is deposited on the substrate in an oxygen atmosphere. 2 o 4 Thin film, the substrate is made of stainless steel, the substrate temperature is 500°C, and the energy density is 2.5j / cm 2 , the deposition time was 0.5 h.

[0031] Then prepare the LiPON thin film, press the powder of lithium phosphate into a lithium phosphate target for magnetron sputtering, and deposit NiFe 2 o 4 The substrate of the thin film is transferred to the magnetron sputtering equipment, the distanc...

Embodiment 3

[0035] LiPON coated NiFe 2 o 4 The film is prepared by pulsed laser deposition and magnetron sputtering. The specific steps are:

[0036] First prepare NiFe 2 o 4 film, the NiFe 2 o 4 The target used for pulsed laser deposition is made by pressing the sheet. The 248nm pulsed laser wave generated by the laser is focused by the lens and then incident on the NiFe 2 o 4 On target, NiFe 2 o 4 The distance between the target and the substrate is 60mm, the substrate is a stainless steel sheet, and NiFe is deposited on the substrate in an oxygen atmosphere. 2 o 4 Thin film, the substrate is made of stainless steel, the substrate temperature is 700°C, and the energy density is 2.5j / cm 2 , the deposition time was 0.5 h.

[0037] Then prepare the LiPON thin film, press the powder of lithium phosphate into a lithium phosphate target for magnetron sputtering, and deposit NiFe 2 o 4 The substrate of the thin film is transferred to the magnetron sputtering equipment, the distanc...

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Abstract

The invention discloses a cathode material used for a lithium battery and a production method thereof. The cathode material is a LiPON-coated nickel ferrite film, a NiFe2O4 film is obtained through apulse laser sedimentation method, and a magnetron sputtering method is used on the NiFe2O4 film to obtain a LiPON-coated nickel ferrite film material. An electrode produced by the film has good chargeand discharge cycle reversibility and multiplying power performance, and specific capacity of the electrode is kept about 872 mAh / g. The electrode capacity has no obvious attenuation after 50 times of circulation. The film electrode material of the LiPON-coated nickel ferrite film has good chemical stability, high specific capacity, and simple preparation method, and is suitable for a lithium battery.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries in electrochemistry, and in particular relates to an anode material for lithium batteries and a preparation method thereof. Background technique [0002] In recent years, lithium-ion batteries have developed rapidly due to their advantages such as high specific capacity, good cycle stability, no memory effect, and environmental protection. With the improvement of people's demand for energy and the development of electric vehicles and mobile electronic products, higher requirements are placed on the specific capacity and rate performance of lithium-ion batteries. In order to further improve the performance of lithium-ion batteries, people are researching and looking for new materials with better performance than the currently used electrode materials. In addition, with the miniaturization of microelectronic devices, it is urgent to develop corresponding lithium-ion batteries, such as thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/58H01M10/0525
CPCH01M4/366H01M4/52H01M4/5825H01M10/0525Y02E60/10
Inventor 赵宇魏开远崔艳华崔益秀张小强倪爽唐兵华曹勇陈勇胡守亮王超
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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