Method for modifying graphite felt electrode for organic flow battery

A technology of a flow battery and a modification method, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of poor electrochemical performance of graphite felt electrodes, and achieve simple and easy operation, increase reaction sites, and low application costs. Effect

Active Publication Date: 2019-03-29
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] However, the electrochemical performance of untreated graphite felt electrodes is poor, so it is very important to im

Method used

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  • Method for modifying graphite felt electrode for organic flow battery
  • Method for modifying graphite felt electrode for organic flow battery
  • Method for modifying graphite felt electrode for organic flow battery

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[0017] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0018] Step 1. Ultrasonic-mix acid treatment of graphite felt, and place a graphite felt (2.5cm*2.5cm) with a thickness of 4mm in a mixed acid solution containing 40mL of concentrated sulfuric acid and concentrated nitric acid In a Teflon container, put it into an ultrasonic cleaning machine water bath and heat it to 80°C, ultrasonic for 10min. Allow it to cool to room temperature, rinse the graphite felt until it is neutral, and dry it.

[0019] Step 2. Put the graphite felt obtained in step 1 into a 0.1 mol / L potassium permanganate solution to completely immerse it, and place it for 12 hours; take out the residual solution on the surface to suck dry.

[0020] Step 3. Put the graphite felt soaked in Step 2 into a semi-closed evaporation container, and evaporate the absolute ethanol onto the graphite felt sample. The temperature is controlled at 60°C for 24 hours....

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Abstract

The invention belongs to the organic battery technology in the field of electrochemical energy storage, and relates to a method for modifying a graphite felt electrode by manganese dioxide which can achieve the large-scale production, in particular to a method for modifying the graphite felt electrode for an organic flow battery. The method comprises the following steps: firstly, processing graphite felt through supersonic-acid mixing, so that the surface area of graphite fibers is increased and the reaction sites of a graphite electrode are increased, and the surface of the graphite fiber isnot obviously broken; growing manganese dioxide on the surfaces of the graphite fibers, so that the electrochemical reaction catalytic activity of the graphite fibers is enhanced, and the battery capacity and the energy efficiency are improved. The method is simple and easy to operate, can realize large-scale production, is low in application cost, and provides an electrode material treatment approach with greatly improved performance for preparation of the organic flow battery.

Description

technical field [0001] The invention belongs to the organic battery technology in the field of electrochemical energy storage, and relates to a method for manganese dioxide modified graphite felt electrodes capable of large-scale production, in particular to a method for modifying graphite felt electrodes for organic liquid flow batteries. Background technique [0002] With the rapid development of the economy, problems such as energy shortages have become increasingly serious, which has greatly promoted the research on renewable energy by researchers from all over the world. Due to the problems of discontinuity, instability, and difficulty in grid connection of renewable energy, its utilization rate is low, and the rate of curtailment of wind and light is high. Therefore, it is necessary to vigorously develop large-scale energy storage technologies that can be matched with it. Among various energy storage technologies, flow batteries have been vigorously developed due to t...

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8817H01M4/9016H01M4/9083Y02E60/50
Inventor 张庶罗金宏李恩竹张树人
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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