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Preparation method of functional hollow metal microballoon

A hollow metal microsphere and functional technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of low capacitance, increase the capacitance of materials, and large quality, and achieve excellent rate performance, Good cycle performance, high capacity effect

Active Publication Date: 2016-10-26
池州市智慧树信息技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: Aiming at the problems of low capacitance, large mass, small specific surface area and poor stability in common traditional metal oxides used as electrode materials at present, a preparation method of functional hollow metal microspheres is provided
The present invention utilizes the polyhydric properties of cellulose microspheres combined with cation exchange to uniformly deposit tin ions on the surface of cellulose microspheres, remove the cellulose microsphere template after high-temperature calcination, and finally obtain hollow tin oxide microspheres, which greatly increases The specific surface area of ​​tin oxide is increased, the quality of the material is reduced, and the active sites of the Faraday reaction are increased, thereby greatly increasing the capacitance of the material, and solving the problems of low capacitance, large mass, The problem of small specific surface area and poor stability has broad application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021]Weigh 500g of dry bamboo chips and put them into a cooking pot, add acetic acid solution with a mass concentration of 3% into the cooking pot according to the material-to-liquid ratio of 1:5, heat up to 140°C and cook for 15 minutes, filter the filter residue and use deionized Rinse with water until the eluate is neutral, and after drying, pre-hydrolyzed bamboo chips are obtained; mix the above-mentioned pre-hydrolyzed bamboo chips with a mass concentration of 50% sodium hydroxide solution at a solid-to-liquid ratio of 1:5 and put them into an Erlenmeyer flask Then, move the Erlenmeyer flask into a 150°C oil bath, heat-preserve for 30 minutes, filter and remove the cooking liquid, wash the filter residue with deionized water for 15 minutes, put it into a vertical hydropulper for 40 minutes of fiber separation and pass through the aperture 0.2mm stainless steel sieve to obtain bamboo dissolving pulp; be 2:1 with above-mentioned bamboo dissolving pulp and mass concentration...

example 2

[0024] Weigh 550g of dry bamboo chips and put them into a cooking pot, add acetic acid solution with a mass concentration of 3% into the cooking pot according to the material-to-liquid ratio of 1:5, heat up to 150°C and cook for 18 minutes, filter the filter residue and use deionized Rinse with water until the eluate is neutral, and after drying, pre-hydrolyzed bamboo chips are obtained; mix the above-mentioned pre-hydrolyzed bamboo chips with a mass concentration of 50% sodium hydroxide solution at a solid-to-liquid ratio of 1:5 and put them into an Erlenmeyer flask Then move the Erlenmeyer flask into an oil bath at 155°C, heat-preserve for 35 minutes, filter and remove the cooking liquid, rinse the filter residue with deionized water for 18 minutes, put it into a vertical hydropulper for 45 minutes of fiber separation and pass through the aperture 0.2mm stainless steel sieve to obtain bamboo dissolving pulp; be 2:1 with above-mentioned bamboo dissolving pulp and mass concentr...

example 3

[0027] Weigh 600g of dry bamboo chips and put them into a cooking pot, add acetic acid solution with a mass concentration of 3% into the cooking pot according to the material-to-liquid ratio of 1:5, heat up to 160°C and cook for 20 minutes, filter the filter residue and use deionized Rinse with water until the eluate is neutral, and after drying, pre-hydrolyzed bamboo chips are obtained; mix the above-mentioned pre-hydrolyzed bamboo chips with a mass concentration of 50% sodium hydroxide solution at a solid-to-liquid ratio of 1:5 and put them into an Erlenmeyer flask Then move the Erlenmeyer flask into an oil bath at 160°C, heat-preserve for 40 minutes, filter and remove the cooking liquid, rinse the filter residue with deionized water for 20 minutes, put it into a vertical hydropulper for 50 minutes of fiber separation and pass through the aperture 0.2mm stainless steel sieve to obtain bamboo dissolving pulp; be 2:1 with above-mentioned bamboo dissolving pulp and mass concentr...

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Abstract

The invention relates to a preparation method of a functional hollow metal microballoon, and belongs to the field of capacitive material preparation. According to the method, hydrolysis soda boiling and bleaching elutriation are carried out on a bamboo chip, as a raw material, to prepare a cellulose sol, the cellulose sol is atomized by a high-pressure spray gun and solidified into a cellulose microballoon in a coagulation bath, the cellulose microballoon is frozen and dried and serves as a template to deposit tin ions after cation exchange, and the functional hollow metal microballon is prepared after high-temperature calcining. According to the invention, a polyhydroxy characteristic of the cellulose microballoon is combined with cation exchange so that the tin ions are deposited on the surface of the cellulose microballoon uniformly, the cellulose microballoon template is removed after high-temperature calcining, and the hollow tin oxide microballoon is obtained finally; and the specific surface area of tin oxide is increased greatly, the weight of the material is reduced, active sites of a Faraday reaction are increased, the capacitance of the material is increased greatly, the problems that a traditional metal oxide electrode material is low in capacitance, high in quality, low in specific surface area and low in stability are solved, and the application prospect is wide.

Description

technical field [0001] The invention relates to a method for preparing functional hollow metal microspheres, belonging to the field of capacitor material preparation. Background technique [0002] Metal oxides have been widely studied as electrode materials due to their special "pseudocapacitive" characteristics and high specific capacity. However, the conductivity of metal oxides is poor, and the cycle performance and rate performance are poor at the same time. This is due to the volume expansion and structural collapse of the battery caused by the process of removing / intercalating lithium ions during charging and discharging, which limits its direction in the direction of the battery. Application, metal oxides have a variety of crystal structures and morphology characteristics, and their physical and chemical properties can be improved by controlling the morphology of metal oxides, and because of the particularity and complexity of metal oxide core-shell materials and holl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/46
CPCY02E60/13H01G11/86H01G11/24H01G11/46
Inventor 金峰林茂平
Owner 池州市智慧树信息技术服务有限公司