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Corncob electrode material as well as preparation method and application thereof

A technology of electrode material and corn cob, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low output power, poor power generation effect of MFC, hindering industrial application process, etc., and achieves simple preparation method and good operation stability , Prevent high temperature from damaging the structure of the catalytic layer

Inactive Publication Date: 2019-08-23
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, restrictive factors such as microbial activity, electrode material performance, and proton exchange membrane selection lead to MFC's disadvantages such as poor power generation effect and low output power, which hinder its industrial application.

Method used

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  • Corncob electrode material as well as preparation method and application thereof
  • Corncob electrode material as well as preparation method and application thereof
  • Corncob electrode material as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0052] As a preparation method of a corncob electrode material according to an embodiment of the present invention, the method comprises the following steps:

[0053] (1) Cut the corncob into pieces according to the size of 1-2cm, wash and dry at 40°C, crush the dried corncob, sieve, and take the corncob powder below 100 mesh;

[0054](2) carbonizing the corncob powder at 500° C. for 1 hour in a tube furnace under a nitrogen gas atmosphere to complete carbonization to obtain corncob biochar;

[0055] (3) The corncob biochar and 1mol / L potassium hydroxide solution were magnetically stirred for 12 hours at 25°C to form a suspension, and filtered to obtain a solid object, corncob biochar and alkaline activation of 1mol / L concentration The dosage mass ratio of agent solution is 1:2;

[0056] (4) Activate the solid object obtained in step (3) in a tube furnace under a nitrogen gas atmosphere for 2 hours at a high temperature of 900° C. to obtain a corncob electrode material.

Embodiment 2

[0058] As a method for preparing a corncob electrode material according to an embodiment of the present invention, the difference between this embodiment and Example 1 is that the mass ratio of corncob biochar to alkaline activator solution with a concentration of 1 mol / L is 1:3 .

Embodiment 3

[0060] As a method for preparing a corncob electrode material according to an embodiment of the present invention, the difference between this embodiment and Example 1 is that the mass ratio of corncob biochar to the alkaline activator solution with a concentration of 1 mol / L is 1:4 .

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Abstract

The invention provides a preparation method of a corncob electrode material. The method comprises the following steps: (1) preparing corncob powders; (2) carbonizing the corncob powders in an inert gas atmosphere to obtain a corncob biochar; (3) fully impregnating the corncob biochar with an alkaline activator solution; (4) separating out the soaked corncob biochar, and activating at a high temperature in an inert gas atmosphere, wherein the high-temperature activation temperature is 850-900 DEG C. The corncob electrode material disclosed by the invention is simple and convenient in preparation method, wide in raw material source and low in cost, and can be applied to a battery cathode to improve the conductivity and electrochemical performance of a microbial fuel cell. The microbial fuelcell cathode loaded with the corncob electrode material disclosed by the invention has relatively good electrical conductivity and electrochemical performance, and can effectively promote the oxygen reduction reaction process. The composite material has relatively high output voltage, high power density and relatively good operation stability, and can be widely applied to microbial batteries, lithium ion batteries and supercapacitors.

Description

technical field [0001] The invention relates to the field of battery electrode material preparation, in particular to a corncob electrode material and its preparation method and application. Background technique [0002] Energy crisis and environmental protection are two major problems facing our country today. Fossil energy is becoming increasingly exhausted. The existing traditional energy is obviously unable to meet the needs of modern industry and economic development. It is often accompanied by environmental pollution problems during its use. Therefore, the development of And the use of biomass energy is expected to solve the energy crisis and environmental pollution, and promote the sustainable development of modern industry and economy. [0003] Microbial fuel cell (MFC) is a fuel cell that utilizes the metabolic function of anodic electrogenic microorganisms to convert chemical energy in the electrogenic substrate into electrical energy. MFC is a new green energy te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M4/88H01M8/16
CPCH01M4/8828H01M4/8882H01M4/96H01M8/16Y02E60/50
Inventor 张鸿郭杨悦卢洵钟铿锵黄晓武肖唐付唐进峰苏敏华
Owner GUANGZHOU UNIVERSITY