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Preparation method of zinc ferrite nanofiber cathode material for lithium ion batteries

A technology for lithium ion batteries and negative electrode materials, applied in the fields of polymer materials and chemical power sources, can solve the problems of poor cycle stability, rapid charge and discharge capability, low cycle efficiency, etc., and achieves simple and easy control of the preparation process, low production cost, Effects of high initial discharge capacity and cycle stability

Inactive Publication Date: 2015-02-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome above-mentioned nano ZnFe 2 o 4 As a negative electrode material for lithium ion batteries, it has the disadvantages of low initial cycle efficiency, poor cycle stability, and poor rapid charge and discharge ability. It provides a zinc oxide nanofiber negative electrode material for lithium ion batteries and a preparation method; it is required to improve cycle efficiency and fast charge and discharge. At the same time, this method has low processing cost, simple and easy to control process, short cycle, high efficiency and energy saving, and is convenient for further expanding production

Method used

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  • Preparation method of zinc ferrite nanofiber cathode material for lithium ion batteries
  • Preparation method of zinc ferrite nanofiber cathode material for lithium ion batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Weigh PAN2g and add it to 23ml DMF solution, stir well, then add PVP0.2222g, C 4 h 6 ZnO 4 2H 2 O0.3656g and Fe(NO 3 ) 3 9H 2 O1.3457g, (PAN / PVP=9:1, C 4 h 6 ZnO 4 2H 2 O and Fe(NO 3 ) 3 9H 2 (2 molar ratio is 1: 2, and the total mass is 50% of the total mass of PAN+PVP), put into the magnetic rotor, and adjust the appropriate rotating speed, and the solution is stirred with a magnetic stirrer for 20-60min until it swells completely, and then at room temperature Stir for 12-24 hours until uniform. The above-mentioned spinning solution prepared is put into self-made spinning equipment, and under the process conditions of spinning voltage 18kV, collection distance 25cm, and solution extrusion speed 0.3ml / h, PAN / PVP / C 4 h 6 ZnO 4 / Fe(NO 3 ) 3 Composite nanofiber membrane. Put the above PAN / PVP / C 4 h 6 ZnO 4 / Fe(NO 3 ) 3 The composite nanofiber membrane was transferred into a high-temperature tube furnace, heated from room temperature to 800 °C in an ...

Embodiment 2

[0020] Weigh PAN2g and add it to 23ml DMF solution, stir well, then add PVP0.2222g, C 4 h 6 ZnO 4 2H 2 O0.3656g and Fe(NO 3 ) 3 9H 2 O1.3457g, (PAN / PVP=9:1, C 4 h 6 ZnO 4 2H 2 O and Fe(NO 3 ) 3 9H 2 (2 molar ratio is 1: 2, and the total mass is 50% of the total mass of PAN+PVP), put into the magnetic rotor, and adjust the appropriate rotating speed, and the solution is stirred with a magnetic stirrer for 20-60min until it swells completely, and then at room temperature Stir for 12-24 hours until uniform. The above-mentioned spinning solution prepared is put into self-made spinning equipment, and under the process conditions of spinning voltage 20kV, collection distance 25cm, and solution extrusion speed 0.5ml / h, PAN / PVP / C 4 h 6 ZnO 4 / Fe(NO 3 ) 3 Composite nanofiber membrane. Put the above PAN / PVP / C 4 h 6 ZnO 4 / Fe(NO 3 ) 3 The composite nanofiber membrane was transferred into a high-temperature tube furnace, heated from room temperature to 800 °C in an ...

Embodiment 3

[0022] Weigh PAN2g and add it to 23ml DMF solution, stir well, then add PVP0.2222g, C 4 h 6 ZnO 4 2H 2 O0.3656g and Fe(NO 3 ) 3 9H 2 O1.3457g, (PAN / PVP=9:1, C 4 h 6 ZnO 4 2H 2 O and Fe(NO 3) 3 9H 2 (2 molar ratio is 1: 2, and the total mass is 50% of the total mass of PAN+PVP), put into the magnetic rotor, and adjust the appropriate rotating speed, and the solution is stirred with a magnetic stirrer for 20-60min until it swells completely, and then at room temperature Stir for 12-24 hours until uniform. The above-mentioned spinning solution prepared is put into self-made spinning equipment, and under the process conditions of spinning voltage 18kV, collection distance 20cm, and solution extrusion speed 1.0ml / h, PAN / PVP / C 4 h 6 ZnO 4 / Fe(NO 3 ) 3 Composite nanofiber membrane. Put the above PAN / PVP / C 4 h 6 ZnO 4 / Fe(NO 3 ) 3 The composite nanofiber membrane was transferred into a high-temperature tube furnace, heated from room temperature to 600 °C in an a...

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Abstract

Belonging to the technical field of high polymer materials and chemical power sources, the invention relates to a zinc ferrite nanofiber cathode material for lithium ion batteries and a preparation method. The zinc ferrite nanofiber material for lithium ion batteries provided by the invention has a large specific surface area. The method provided by the invention includes: firstly utilizing the electrospinning technology to prepare PAN / PVP / C4H6ZnO4 / Fe(NO3)3 composite nanofiber, and then conducting high-temperature calcinations to obtain the zinc ferrite nanofiber. The method has the characteristics of simple and easily controllable preparation process, and low production cost. As a lithium ion battery negative electrode material, the material provided by the invention overcomes the disadvantages of low initial cycle efficiency, poor cycle stability and quick charge-discharge capacity and the like of other methods prepared zinc ferrite nano-particles serving as the lithium ion battery cathode materials. The invention provides the zinc ferrite nanofiber cathode material for lithium ion batteries and the preparation method. The material has high initial discharge capacity and cycle stability, improves the high power characteristics and quick charge-discharge capacity of the cathode material, and is accord with the development requirements of mobile power sources in portable equipment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and chemical power sources, and specifically relates to a lithium-ion battery nano negative electrode material and a preparation method, in particular to a lithium-ion battery zinc ferrite nanofiber negative electrode material and a preparation method. Background technique [0002] With the progress of the times, energy is closely related to the survival and development of human society. Sustainable development is our common aspiration and the core of our struggle. Natural resources will eventually be exhausted. We need to develop new energy and new energy materials to solve the increasingly scarce energy problem and the increasingly serious environmental pollution. As an important part of the new energy field, the battery industry has become a new hot spot in global development. The development and popularization of portable electrical equipment, such as mobile phones, computers, etc.,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52
CPCB82Y30/00B82Y40/00C01G9/00H01M4/5825H01M10/0525Y02E60/10
Inventor 乔辉罗磊陈克魏取福徐阳蔡以兵
Owner JIANGNAN UNIV