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High-capacity mesoporous carbon nanofiber for lithium-ion battery and preparation method of high-capacity mesoporous carbon nanofiber

A lithium-ion battery and nanofiber technology, which is applied in the fields of nanomaterials and new energy, can solve the problems of complex process flow, maintain at 400mAh, and the pore structure is not obvious, and achieve the effect of simple process flow

Inactive Publication Date: 2017-02-22
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent 201410244910.4 discloses a method for preparing a mesoporous carbon material and its application as an electrode material. Chinese patent 201210050636.8 discloses a carbon material with a hierarchical pore structure for the negative electrode of a power lithium-ion battery and its preparation method. Plate-like magnesium aluminum hydrotalcite and metal sources are used as templates, and the process is complicated
Chinese patent 201010581833.3 discloses a mesoporous carbon nanofiber anode material for lithium-ion batteries and its preparation method. The fiber is obtained by electrospinning and further carbonized to obtain carbon nanofibers, but there are problems such as inconspicuous pore structure. Battery negative electrode material, after 20 cycles, the specific capacity is only maintained at 400mAh / g, which is relatively small compared to traditional graphite (~372mAh / g)

Method used

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  • High-capacity mesoporous carbon nanofiber for lithium-ion battery and preparation method of high-capacity mesoporous carbon nanofiber
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  • High-capacity mesoporous carbon nanofiber for lithium-ion battery and preparation method of high-capacity mesoporous carbon nanofiber

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Experimental program
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Effect test

Embodiment 1

[0027] The uniformly dispersed fibrous calcium citrate was placed in a tube furnace, and under the protection of inert gas, the furnace temperature was raised to an activation temperature of 700 °C at a heating rate of 5 °C / min, and after holding for 2 hours, it was naturally cooled to room temperature; then The obtained carbonized product was taken out, and templates such as calcium oxide were removed by immersion in a 1 mol / L dilute hydrochloric acid solution, and washed with deionization for several times until neutral. The cleaned product was placed in a freeze dryer for drying, and finally obtained. mesoporous carbon nanofibers, and the obtained mesoporous carbon nanofibers were tested for physical and chemical properties such as morphology and structure.

[0028] Further, the mesoporous carbon nanofibers were used as the active material for battery assembly. First, the active material: the binder: the conductive agent was mixed uniformly at a mass ratio of 8:1:1, and then...

Embodiment 2

[0038] The uniformly dispersed fibrous calcium citrate was placed in a tube furnace, and under the protection of inert gas, the furnace temperature was raised to an activation temperature of 800 °C at a heating rate of 5 °C / min, and after holding for 2 hours, it was naturally cooled to room temperature; then The obtained carbonized product was taken out, and templates such as calcium oxide were removed by immersion in a 1 mol / L dilute hydrochloric acid solution, and washed with deionization for several times until neutral. The cleaned product was placed in a freeze dryer for drying, and finally obtained. mesoporous carbon nanofibers, and the obtained mesoporous carbon nanofibers were tested for physical and chemical properties such as morphology and structure.

[0039]Further, the mesoporous carbon nanofibers were used as the active material for battery assembly. First, the active material: the binder: the conductive agent was mixed uniformly at a mass ratio of 8:1:1, and then ...

Embodiment 3

[0042] The uniformly dispersed fibrous calcium citrate was placed in a tube furnace, and under the protection of inert gas, the furnace temperature was raised to an activation temperature of 700 °C at a heating rate of 5 °C / min, and after holding for 4 hours, it was naturally cooled to room temperature; then The obtained carbonized product was taken out, and templates such as calcium oxide were removed by immersion in a 1 mol / L dilute hydrochloric acid solution, and washed with deionization for several times until neutral. The cleaned product was placed in a freeze dryer for drying, and finally obtained. mesoporous carbon nanofibers, and the obtained mesoporous carbon nanofibers were tested for physical and chemical properties such as morphology and structure.

[0043] Further, the mesoporous carbon nanofibers were used as the active material for battery assembly. First, the active material: the binder: the conductive agent was mixed uniformly at a mass ratio of 8:1:1, and then...

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Abstract

The invention discloses a high-capacity mesoporous carbon nanofiber for a lithium-ion battery and a preparation method of the high-capacity mesoporous carbon nanofiber, and belongs to the technical field of nano materials and new energy. According to the method, fibrous calcium citrate is adopted as a raw material and the mesoporous carbon nanofiber can be obtained through carbonization and template removal; an activating agent does not need to be added; and the operation process is simple. The mesoporous carbon nanofiber has relatively large specific surface area; and a lot of pore and channel structures are uniformly distributed in the fiber. The mesoporous carbon nanofiber is used as a negative electrode material of the lithium-ion battery, so that, compared with a traditional negative electrode material and an existing carbon fiber material, the high-capacity mesoporous carbon nanofiber has obvious advantages in the specific capacity, the cycle stability and the rate capability, and can meet the requirements of the fast-developing power lithium-ion battery.

Description

technical field [0001] The invention relates to a high-capacity mesoporous carbon nanofiber for lithium ion batteries and a preparation method thereof, belonging to the technical field of nanomaterials and new energy. Background technique [0002] Lithium-ion battery is a kind of secondary battery (rechargeable battery), which has the characteristics of high operating voltage, large specific energy, long service life and no memory effect. In recent years, the industrial research and development of lithium-ion batteries has developed rapidly. As the negative electrode material of lithium-ion batteries, metal lithium is first used, followed by alloys; however, they cannot solve the safety performance of lithium-ion batteries, so the birth of Lithium-ion battery with carbon material as negative electrode. [0003] Since the commercialization of lithium-ion batteries, carbon materials have dominated the negative electrode materials. As a special carbon-based material, carbon na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/1393B82Y40/00
CPCB82Y40/00H01M4/1393H01M4/583Y02E60/10
Inventor 李峻峰高阳刘雨晴刘乾李冠玉周波张佩聪赖雪飞
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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