Method for preparing active metal oxide-carbonized bacterial cellulose electrode material

A technology of bacterial cellulose and active metals, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of easy agglomeration of active materials and achieve high capacity density and high dispersion

Active Publication Date: 2019-09-27
南京荣之盛生物科技有限公司
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  • Application Information

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Problems solved by technology

[0004] Aiming at the problems in the prior art that when the carbonized bacterial cellulose deposits metal active oxides in situ, the active materials are easy to agglomerate in the three-dimensional space structure, thereby inhibiting the electrochemical activity of the composite material, etc., the present invention provides an active metal oxide- Preparation method of carbonized bacterial cellulose electrode material

Method used

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  • Method for preparing active metal oxide-carbonized bacterial cellulose electrode material
  • Method for preparing active metal oxide-carbonized bacterial cellulose electrode material
  • Method for preparing active metal oxide-carbonized bacterial cellulose electrode material

Examples

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Embodiment 1

[0028] In step 1, the surface of the carbonized bacterial cellulose fiber is oxidized by a constant potential anodic oxidation method, and the oxidation potential and oxidation time are 2V and 300s, respectively, to obtain a hydrophilic flexible carbonized bacterial cellulose material.

[0029] Step 2, soaking the hydrophilic flexible carbonized bacterial cellulose material in 0.02M nickel nitrate solution for 2 hours, and then volatilizing ethanol at 60° C. to obtain the nickel nitrate-carbonized bacterial cellulose material.

[0030] Step 3, cover the flexible nickel nitrate-carbonized bacterial cellulose membrane material in a closed ammonia beaker, and make ammonia gas permeate the nickel nitrate-carbonized bacterial cellulose membrane at 110°C, ammonia gas and carbonized bacterial cellulose fiber Nickel nitrate on the surface reacts to obtain a flexible nickel oxide-carbonized bacterial cellulose material.

Embodiment 2

[0032] In step 1, the surface of the carbonized bacterial cellulose fiber is oxidized by a constant potential anodic oxidation method, and the oxidation potential and oxidation time are 5V and 100s, respectively, to obtain a hydrophilic flexible carbonized bacterial cellulose material.

[0033] Step 2: Soak the hydrophilic flexible carbonized bacterial cellulose material in 0.05M nickel nitrate solution for 1 hour, and then volatilize ethanol at 60° C. to obtain nickel nitrate-carbonized bacterial cellulose material.

[0034] Step 3, cover the flexible nickel nitrate-carbonized bacterial cellulose membrane material in a closed ammonia beaker, and make ammonia gas permeate the nickel nitrate-carbonized bacterial cellulose membrane at 120°C, ammonia gas and carbonized bacterial cellulose fiber Nickel nitrate on the surface reacts to obtain a flexible nickel oxide-carbonized bacterial cellulose material.

Embodiment 3

[0036] In step 1, the surface of the carbonized bacterial cellulose fiber is oxidized by a constant potential anodic oxidation method, and the oxidation potential and oxidation time are 5V and 300s, respectively, to obtain a hydrophilic flexible carbonized bacterial cellulose material.

[0037] Step 2, soaking the hydrophilic flexible carbonized bacterial cellulose material in 0.1M nickel nitrate solution for 1 hour, and then volatilizing ethanol at 60° C. to obtain the nickel nitrate-carbonized bacterial cellulose material.

[0038] Step 3, cover the flexible nickel nitrate-carbonized bacterial cellulose membrane material in a closed ammonia beaker, and make ammonia gas permeate the nickel nitrate-carbonized bacterial cellulose membrane at 130°C, ammonia gas and carbonized bacterial cellulose fiber Nickel nitrate on the surface reacts to obtain a flexible nickel oxide-carbonized bacterial cellulose material.

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Abstract

The invention discloses a method for preparing an active metal oxide-carbonized bacterial cellulose electrode material. The method comprises firstly performing a surface hydrophilic treatment on the carbonized bacterial cellulose by electrochemical oxidation; immersing an ethanol solution of active metal nitrate; volatilizing the ethanol in the material; then introducing an ammonia gas into a nitrate-carbonized bacterial cellulose film to obtain a light and flexible active metal oxide-carbonized bacterial cellulose film composite material by vapor deposition. In the composite material prepared by the method, the nickel oxide has high dispersibility such that the agglomeration of active materials such as the nickel oxide can be inhibited in the three-dimensional structure of the carbonized bacterial cellulose. The method is suitable for the field of supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of preparation of composite materials, and relates to a preparation method of an active metal oxide-carbonized bacterial cellulose electrode material. Background technique [0002] Bacterial cellulose is a natural fiber produced by microbial fermentation. Compared with synthetic cellulose, it has many excellent physical, chemical and mechanical properties, such as biodegradability, good three-dimensional network structure, higher chemical purity and better Mechanical strength, etc., generally used in electrochemical, medical and food industries. The synthesis of bacterial cellulose only needs cheap raw materials, such as glucose, sucrose and waste biomass acid hydrolysis solution, etc., and these raw materials are renewable resources, and the microbial synthesis efficiency is much higher than artificial synthesis, which is a green preparation method. It has become a research hotspot of new biomaterials. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/40H01G11/26H01G11/86
CPCH01G11/26H01G11/40H01G11/46H01G11/86Y02E60/13
Inventor 孙汴京陈辰黄洋林建斌张威威韦峰
Owner 南京荣之盛生物科技有限公司
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