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Preparation method and application of novel MnOm@BCCNFs composite material

A composite material and a new type of technology, applied in the field of materials, can solve the problems of poor conductivity of metal oxides, achieve strong cycle stability, and improve specific capacitance.

Active Publication Date: 2020-05-29
HAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal oxides have poor conductivity, and often need to be compounded with materials with good conductivity, such as carbon materials, to improve conductivity.

Method used

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  • Preparation method and application of novel MnOm@BCCNFs composite material
  • Preparation method and application of novel MnOm@BCCNFs composite material
  • Preparation method and application of novel MnOm@BCCNFs composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] 1. Fe 3 O 4 @BCCNFs electrode preparation

[0023] 1. Cultivation of acetic acid bacteria

[0024] Take acetic acid bacteria culture medium (containing 5g of polyprotein, 5g of yeast extract, 5g of glucose, 5g of mannitol, MgSO 4 O 7 H 2 O 1g, pH 6.6-7.0) 21g was put into 1000mL distilled water, autoclaved at 121°C for 15min, after sterilization, the acetic acid bacteria culture solution was obtained, and it was cooled to room temperature. Under aseptic operation, the Acetobacter xylinum strains were added to the culture solution and cultivated at 30°C for 7 days to obtain the Acetobacter xylinum mother solution that multiplyed and grew.

[0025] 2.Fe 3 O 4 @BCCNFs electrode material preparation

[0026] Weigh 0.8g FeCl 3 .6H 2 O was added to 4mL of distilled water, dissolved and then dropped into 20mL of boiling water, and then cooled naturally after 2 minutes to obtain ferric hydroxide colloid.

[0027] Purchase fresh green coconuts on the market and filter to obtain coconut w...

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Abstract

The invention discloses a preparation method of a novel BCCNFs@MnOm composite material. According to the method, Hainan natural coconut water is used as a nutrient solution, a product generated through acetobacterxylinum static metabolic fermentation directly wraps transition metal oxide (MnOm) colloidal particles dispersed in the nutrient solution, and a gel (MnOm@BC) with bacterial cellulose wrapping the transition metal oxide colloidal particles is formed. The gel is subjected to freeze drying and high-temperature annealing treatment to obtain a coating structure composite material (MnOm@BCCNFs) of bacterial cellulose carbon nanofiber coated transition metal oxide nanoparticles, and the material is applied to the field of supercapacitors.

Description

Technical field [0001] The invention belongs to the technical field of materials, and relates to a type of supercapacitor electrode material, in particular to the preparation of bacterial cellulose carbon materials by using natural coconut water as a nutrient solution. Background technique [0002] Supercapacitors can be divided into two types according to different energy storage methods. One type is electric double layer capacitors (EDLCs), which realize energy storage through electric double layers formed on the surface of electrodes by charges and electrolyte ions; the other type is pseudocapacitance capacitors , It realizes energy storage through the redox reaction of the electroactive material on the electrode surface. Pseudocapacitors store electricity or electrical energy far greater than electric double-layer capacitors. At present, commercial supercapacitors are mainly EDLCs capacitors, whose energy density is relatively low, and cannot meet the increasing production a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/34H01G11/44H01G11/46H01G11/86
CPCH01G11/26H01G11/34H01G11/44H01G11/46H01G11/86Y02E60/13
Inventor 王崇太华英杰刘嘉豪舒澜清马杭
Owner HAINAN NORMAL UNIV