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Macro biomass modified electrode material and preparation method thereof

An electrode material, biomass technology, applied in battery electrodes, regenerative fuel cells, circuits, etc., can solve the problems of low chemical activity, poor stability, low specific surface area, etc., achieve high electrochemical catalytic activity, good vanadium ion catalytic performance , the effect of large specific surface area

Active Publication Date: 2021-10-29
北京德泰储能科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to achieve the above purpose, the present invention provides a macro-mass modified electrode material and its preparation method, which can obtain a macro-electrode material with high electrical conductivity, high specific surface area, high electrochemical activity, good catalytic performance for vanadium ions, and good stability. A large amount of biomass modified electrode material, low modification cost and good overall performance of all-vanadium redox flow battery, solves the problems of poor conductivity, low chemical activity, low specific surface area and poor stability of carbon felt in the prior art. The performance of the all-vanadium redox flow battery is poor, resulting in the high cost of the all-vanadium redox flow battery and the fact that biomass materials cannot be directly made into powders and used as electrode materials.

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  • Macro biomass modified electrode material and preparation method thereof

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preparation example Construction

[0027] A preparation method of macro-mass modified electrode material, comprising the following steps:

[0028] Step 1: Dry the carbon electrode material at a temperature of 80°C to 100°C for 8h to 10h, then wash the dried carbon electrode material with deionized water for 3 to 5 times, and wash the cleaned carbon electrode The material is immersed in absolute ethanol and ultrasonically cleaned for 20 to 30 minutes, and the ultrasonically treated carbon electrode material is taken out, and dried at a temperature of 80°C to 100°C for 8h to 10h to obtain a pretreated carbon electrode material.

[0029] Carbon-based electrode materials include any one of graphite felt, graphite, carbon felt, carbon cloth, and carbon fiber.

[0030] Step 2: dry and broken biomass lotus seed shells are placed in the grinding container, add sucrose solution with a mass volume ratio of 1g (biomass lotus seed shells quality): 0.5ml (sucrose solution volume), then add sucrose solution with 1g (biomass ...

Embodiment 1

[0036] A preparation method of macro-mass modified electrode material, comprising the following steps:

[0037] (1) Dry the graphite felt at 80°C for 8 hours, then wash the dried graphite felt with deionized water for 3 times, immerse the cleaned graphite felt in absolute ethanol and ultrasonically clean it for 20 minutes, take out the ultrasonic treatment The graphite felt was dried at a temperature of 80° C. for 8 hours to obtain a pretreated graphite felt.

[0038] (2) dry and broken biomass lotus seed shells are placed in a grinding container, add sucrose solution with a mass volume ratio of 1g:0.5ml, then add deionized water with a mass volume ratio of 1g:9.5ml, and grind the The biomass lotus seed shell, sucrose solution, and deionized water were ground together for 20 minutes to form a slurry; the concentration of the sucrose solution was 0.1mol / L.

[0039] (3) Put the slurry obtained in (2) into a ball mill with a ball-to-material ratio of 3:1, and ball mill for 30 mi...

Embodiment 2

[0043] A preparation method of macro-mass modified electrode material, comprising the following steps:

[0044] (1) Dry the carbon felt at 100°C for 10 hours, then wash the dried carbon felt with deionized water for 5 times, immerse the cleaned carbon felt in absolute ethanol and ultrasonically clean it for 30 minutes, take it out after ultrasonic treatment The carbon felt was dried at 100° C. for 10 hours to obtain a pretreated carbon felt.

[0045] (2) dry biomass lotus seed shell residue is placed in the grinding container, add sucrose solution with the mass volume ratio of 1g:0.5ml, then add deionized water with the mass volume ratio of 1g:9.5ml, the grinding container The biomass lotus seed shell, sucrose solution, and deionized water were ground together for 30 minutes to form a slurry; the concentration of the sucrose solution was 1.0mol / L.

[0046] (3) Put the slurry obtained in (2) into a ball mill with a ball-to-material ratio of 3:1, and ball mill for 30 minutes at...

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Abstract

The invention discloses a macro biomass modified electrode material and a preparation method thereof. The preparation method comprises the steps of adding dried and crushed biomass lotus seed shells into a sucrose solution and deionized water, and forming slurry through grinding; carrying out ball milling and ultrasonic treatment on the slurry; putting the pretreated carbon electrode material into the slurry subjected to ultrasonic treatment for deposition, taking out and drying to obtain a biomass-loaded carbon electrode material; and heating the biomass-loaded carbon electrode material to 1045-1055 DEG C in an inert atmosphere state, carrying out heat preservation for a period of time, and carrying out furnace cooling to room temperature so as to obtain the macro biomass modified electrode material. According to the macro biomass modified electrode material and the preparation method thereof, carbon felt is used as a raw material, nano carbon spheres are formed on the surface of a carbon felt electrode by using a biomass carbon source through a high-temperature pyrolysis method, and the prepared biomass modified carbon felt electrode material has the advantages of high conductivity, large specific surface area, good vanadium ion catalytic performance, good stability, high electrochemical catalytic activity and the like.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for all-vanadium redox flow batteries, and relates to a macro-biomass modified electrode material and a preparation method thereof. Background technique [0002] All-vanadium redox flow battery (VRB) is widely used in wind energy, solar energy and other renewable energy power generation due to its advantages of high power and energy independence, simple and flexible design, long cycle life, fast charge and discharge, and low operating cost. Process large-scale energy storage devices. At the same time, the all-vanadium redox flow battery is also a large-scale energy storage technology widely used in power station energy storage, power grid peak shaving and other fields in recent years. [0003] However, the current commercialization of all-vanadium redox flow batteries is constrained by high costs, and the electrode material is the key factor determining the cost of the stack. An elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M4/90H01M8/18
CPCH01M4/8605H01M4/9083H01M4/88H01M8/188Y02E60/50
Inventor 贾传坤胡正宇丁美
Owner 北京德泰储能科技有限公司