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Method for preparing lithium-ion battery anode material through iron-containing solid waste from electroflocculation printing-dyeing wastewater

A lithium-ion battery, printing and dyeing wastewater technology, applied in battery electrodes, circuits, electrical components and other directions, can solve the problem of high processing cost, achieve the effect of good performance and simple method

Active Publication Date: 2017-09-05
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are relatively few reports on the treatment of solid waste generated by electrocoagulation. Many solid wastes are classified as "hazardous waste" and the cost of treatment is very high.

Method used

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  • Method for preparing lithium-ion battery anode material through iron-containing solid waste from electroflocculation printing-dyeing wastewater
  • Method for preparing lithium-ion battery anode material through iron-containing solid waste from electroflocculation printing-dyeing wastewater
  • Method for preparing lithium-ion battery anode material through iron-containing solid waste from electroflocculation printing-dyeing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Wastewater comes from a paper dyeing factory that dyes a batch of paper. The organic dye used in the dyeing process is methylene blue. They are dyed. Take 2 tons of (absolutely dry) wood pulp and put it in a container, add water according to the pulp concentration of 1%, disperse until there are no lumps, adjust the appropriate pH value, heat at a specific temperature, and stir with a stirrer at the same time, then pass Into 0.5% (dry) methylene blue solution. Add 0.5% (absolutely dry) NaCl as a dyeing aid, and make paper after a period of heat balance (contact time). The drying temperature is 92°C and the drying time is 5 minutes. After copying the paper, the remaining liquid is exactly the waste water of the present invention.

[0039] The iron-containing sludge produced by electrocoagulation is used to prepare lithium-ion battery negative electrode materials and methods, comprising the following steps:

[0040] (1) Preparation of solid waste iron sludge: Measure 2...

Embodiment 2

[0045] The waste water is discharged from a textile printing and dyeing company after dyeing a batch of textiles. The organic dye used in the dyeing process is Rhodamine-B. To stain. The process is to put the bleached cotton cloth into a bathtub with a liquor ratio of 20:1, and the components of the dye solution are 1.5g / L Rhodamine-B, 2.5g / L Pingpingjia O-25, and 2.5g / L Swire Oil. Stir and heat the cotton cloth and dye to 60°C, add salt, and maintain for 20 minutes, add sodium carbonate, keep the temperature for 20-40 minutes, cool down, and the remaining dye liquor is the printing and dyeing wastewater described in the present invention.

[0046] The iron-containing sludge produced by electrocoagulation is used to prepare lithium-ion battery negative electrode materials and methods, comprising the following steps:

[0047] (1) Preparation of solid waste iron sludge: Measure 200mL of filtered waste water containing rhodamine-B3.13mmol / L after dyeing a batch of textiles by a ...

Embodiment 3

[0052] The waste water is discharged from a plastic coloring company after coloring the raw materials of toys. The organic dye used in the dyeing process is lemon yellow. / L lemon yellow dye solution is sprayed on the printing plate, the spray gun pressure is 0.2MPa, the printing plate is removed and dried at 60 degrees. The dye solution dripped on the printing plate during the spraying process is exactly the waste water described in the present invention.

[0053] The iron-containing sludge produced by electrocoagulation is used to prepare lithium-ion battery negative electrode materials and methods, comprising the following steps:

[0054] (1) Preparation of solid waste iron sludge: Measure 200mL of filtered waste water containing tartrazine 2.80mmol / L after a certain plastic coloring company colored the toy raw materials, add it to a 250mL beaker together with 10g of sodium sulfate, stir, and mix into solution. Turn on the DC stabilized voltage and current power supply, a...

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Abstract

The invention provides a method for preparing a lithium-ion battery anode material through iron-containing solid waste from electroflocculation printing-dyeing wastewater; the method comprises: filtering printing-dyeing wastewater, adding electrolyte sodium sulfate, electrolyzing through a metal iron electrode under the voltage of 0.5-10 V, settling by flocculating until the color of the solution fades, centrifuging, collecting solid precipitate, drying, and grinding into solid powder; mixing the solid powder with carbon black and polyvinylidene fluoride, adding N-methylpyrrolidone, grinding well to obtain slurry, applying the slurry to a copper plate, and drying to obtain the lithium-ion battery anode material. The method according to the invention is simple, has good performance, and has promising marketing application prospect; the concept of waste recycling, energy conservation and emission reduction, and environmental friendliness is embodied, and the requirement for social development is met.

Description

[0001] (1) Technical field [0002] The invention relates to a method for recycling iron-containing solid waste obtained from electrocoagulation printing and dyeing wastewater, in particular to a method for preparing a lithium battery negative electrode material by using electroflocculation printing and dyeing wastewater to produce solid waste iron-containing sludge. The lithium ion negative electrode material prepared by the invention The invention has the advantages of large electric capacity, high cycle stability and the like, and the method of the invention conforms to the concepts of energy saving and emission reduction, green environmental protection and circular economy. [0003] (2) Background technology [0004] Printing and dyeing wastewater refers to the wastewater discharged in the production process of enterprises mainly engaged in the post-processing of cotton and hemp products, and the dyeing of chemical fibers and their blended products. It mainly contains indig...

Claims

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Application Information

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IPC IPC(8): H01M4/36
CPCH01M4/364Y02E60/10
Inventor 张诚刘刚吕耀康何晖晖杜惟实李林陈章新汪岩
Owner ZHEJIANG UNIV OF TECH
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