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a co 9 the s 8 Preparation method of self-supporting negative electrode of carbon felt sodium ion battery

A sodium-ion battery, self-supporting technology, applied in the field of electrochemistry, can solve the problems of long time consumption, achieve the effect of short time consumption, improve stability, and alleviate volume expansion

Active Publication Date: 2021-01-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are also certain problems in the preparation of composite materials. The coating process is usually used in the preparation of electrode sheets, which takes a long time.

Method used

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  • a co <sub>9</sub> the s <sub>8</sub> Preparation method of self-supporting negative electrode of carbon felt sodium ion battery
  • a co <sub>9</sub> the s <sub>8</sub> Preparation method of self-supporting negative electrode of carbon felt sodium ion battery
  • a co <sub>9</sub> the s <sub>8</sub> Preparation method of self-supporting negative electrode of carbon felt sodium ion battery

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Effect test

Embodiment 1

[0029] A kind of Co 9 S 8 The preparation method of carbon felt sodium ion battery self-supporting negative electrode, comprises the following steps:

[0030] Step 1: Cut the carbon felt with a thickness of 1 mm into 4 × 3 cm carbon felt pieces and place them in a mixed solution of concentrated nitric acid and hydrogen peroxide with a volume ratio of 1:1 for 24 hours in the dark, and then use deionized water and After washing with absolute ethanol for 4 times, dry at 100°C for 3 hours in a vacuum environment to obtain carbon felt sheet A;

[0031] Step 2: Add 1.2g of cobalt chloride and 5ml of ethylenediamine into 25mL of deionized water, stir magnetically at a speed of 400 r / min for 2h and dissolve to obtain solution C; add 1g of thioacetamide into 25mL of anhydrous In ethanol, stir magnetically at 400r / min for 2h and dissolve to obtain solution D; mix solution C and solution D to obtain solution E;

[0032] Step 3: Submerge the carbon felt sheet A in the solution E and le...

Embodiment 2

[0038] A kind of Co 9 S 8 The preparation method of carbon felt sodium ion battery self-supporting negative electrode, comprises the following steps:

[0039] Step 1: Cut the carbon felt with a thickness of 1 mm into 4 × 3 cm carbon felt pieces and place them in a mixed solution of concentrated nitric acid and hydrogen peroxide with a volume ratio of 1:2 and let it stand in the dark for 36 hours, then use deionized water and After washing with absolute ethanol for 5 times, dry at 80°C for 5 hours in a vacuum environment to obtain carbon felt sheet A;

[0040] Step 2: Add 1.5g of cobalt chloride and 8ml of ethylenediamine into 30mL of deionized water, stir magnetically at a speed of 500 r / min for 1.5h and dissolve to obtain solution C; add 1.2g of thioacetamide into 30mL In absolute ethanol, stir magnetically at a speed of 500r / min for 1.5h and dissolve to obtain solution D; mix solution C and solution D to obtain solution E;

[0041] Step 3: Submerge the carbon felt sheet A...

Embodiment 3

[0044] A kind of Co 9 S 8 The preparation method of carbon felt sodium ion battery self-supporting negative electrode, comprises the following steps:

[0045] Step 1: Cut the carbon felt with a thickness of 1 mm into 4 × 3 cm carbon felt sheets and place them in a mixed solution of concentrated nitric acid and hydrogen peroxide with a volume ratio of 1:3 and let it stand in the dark for 48 hours, then use deionized water and After washing with absolute ethanol for 3 times, dry at 60°C for 6 hours in a vacuum environment to obtain carbon felt sheet A;

[0046] Step 2: Add 2g of cobalt chloride and 10ml of ethylenediamine into 20mL of deionized water, stir magnetically at a speed of 600r / min for 1h and dissolve to obtain solution C; add 1.5g of thioacetamide into 20mL of absolute ethanol , stirred magnetically at a speed of 600r / min for 1h and dissolved to obtain solution D; mixed solution C and solution D to obtain solution E;

[0047] Step 3: Submerge the carbon felt sheet ...

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Abstract

The invention discloses a Co 9 S 8 / The preparation method of the self-supporting negative electrode of the carbon felt sodium-ion battery, the self-supporting base carbon felt is cut and placed in a mixed solution of concentrated nitric acid and hydrogen peroxide, kept in the dark, and then the self-supporting base carbon felt is cleaned and dried, Obtain carbon felt sheet A; Add cobalt chloride to deionized water and stir and dissolve, then add ethylenediamine to obtain solution C; Add thioacetamide to deionized water equal volume dehydrated alcohol and stir and dissolve, Solution D is obtained; solution C and solution D are mixed to obtain solution E; carbon felt sheet A is immersed in solution E to obtain carbon felt sheet B; carbon felt sheet B is placed in a porcelain boat and placed in a tubular Calcined in an atmosphere furnace and cooled to room temperature to obtain Co 9 S 8 / Carbon felt sodium-ion battery self-supporting negative electrode; its method does not use the coating process, and the time-consuming is short.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and relates to a Co 9 S 8 The preparation method of self-supporting negative electrode of carbon felt sodium ion battery. Background technique [0002] Lithium-ion batteries have become one of the most concerned energy storage devices in recent years due to their advantages such as light weight, small size, high operating voltage, high capacity, and long cycle life. Due to large-scale use, the storage of lithium resources on the earth is also facing the situation of depletion. The sodium resource has a large amount of storage on the earth, is abundant in resources, and is easy to obtain, so its preparation cost is lower than that of lithium-ion batteries. At the same time, there are many similarities in properties with lithium as the main group I element in the periodic table of elements. Sodium-ion batteries have gradually become a research hotspot in recent years because of their abu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1397H01M4/04H01M10/054B82Y40/00
CPCB82Y40/00H01M4/0402H01M4/0471H01M4/1397H01M10/054Y02E60/10
Inventor 黄剑锋何枢薇李嘉胤曹丽云徐培光王羽偲嘉
Owner SHAANXI UNIV OF SCI & TECH
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