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Negative electrode material with Sn-containing electrocatalyst of vanadium redox flow battery and preparation method for negative electrode material

A technology of electrocatalyst and negative electrode material, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of affecting the working current density and energy efficiency of the battery, affecting the electron exchange rate of active materials, affecting the performance of the battery system, etc., to achieve easy operation. , the method is simple, and the effect of improving the electrocatalytic activity

Inactive Publication Date: 2017-05-10
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

However, the performance of the electrode directly affects the rate of electron exchange of the active material, which greatly affects the working current density and energy efficiency of the battery, thus affecting the performance of the entire battery system.

Method used

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preparation example Construction

[0026] The method for preparing the vanadium battery negative electrode material containing Sn electrocatalyst of the present invention adopts an electroless plating method, and the method may further comprise the steps:

[0027] First, soak the carbon matrix material in the sensitizing solution containing Sn. Here, the sensitizing solution is composed of 5g / L-120g / L stannous chloride and 5ml / L-500ml / L hydrochloric acid. The carbon matrix material can be one or a combination of two or more of graphite felt, graphite plate, carbon paper, graphene and carbon cloth. Soaking can be carried out at room temperature or under heating. The soaking time may be 1 min to 30 min, preferably 2 min to 10 min.

[0028] Secondly, the soaked carbon matrix material is placed in an activation solution for activation treatment. Wherein, the activation solution is an aqueous solution containing 1g / L-30g / L palladium chloride. The time for the activation treatment may be 1 min to 30 min, preferab...

Embodiment 1

[0035]The electroless plating solution consists of 7.6g / L stannous chloride, 4.5g / L titanium trichloride, 102g / L sodium citrate, 15g / L disodium edetate, 9.8g / L sodium acetate and 0.32g / L L benzenesulfonic acid composition. Put a graphite felt of a certain size into a solution containing 40g / L stannous chloride and 100ml / L hydrochloric acid and soak it for 3 minutes at room temperature, then activate it with an aqueous solution containing 2g / L palladium chloride for 5 minutes, and wash until the pH is 7 or so; then put it into the plating solution for electroless plating, adjust the pH of the plating solution to 9 with ammonia water, maintain the temperature of the plating solution at 85°C, and the electroless plating time is 2 minutes. Finally, the Sn-modified carbon cloth was obtained, and the mass ratio of Sn loading was determined to be 1% by weighing with an electronic balance.

[0036] In order to test the effect of Sn-modified carbon cloth as the negative electrode of v...

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Abstract

The invention provides a preparation method for a negative electrode material with a Sn-containing electrocatalyst of a vanadium redox flow battery. The preparation method adopts a chemical plating method and comprises the steps of putting a carbon base material into a sensitizing solution, soaking and taking out, and then putting into an activating solution to perform activation processing; and putting the activated carbon base material into a plating solution to be subjected to chemical plating to obtain the electrode material with the Sn-containing electrocatalyst. By modifying the Sn-containing electrocatalyst on the surface of the carbon base material through the chemical plating method, the electrode obtains high electrochemical activity and electrocatalytic activity, so that electrochemical polarity is lowered, and the voltage efficiency and energy efficiency of the battery are reduced; in addition, the method is simple and easy to operate; and the adopted material is low-cost Sn salt, so that low cost is achieved.

Description

technical field [0001] The invention belongs to the field of liquid flow energy storage vanadium batteries, and in particular relates to a vanadium battery negative electrode material containing Sn electrocatalyst and a preparation method thereof. Background technique [0002] In recent years, wind energy and solar energy have been widely developed and utilized, but the proportion of abandoned wind and solar energy continues to increase. In order to utilize wind energy and solar energy more efficiently, there is an increasingly strong demand for large-scale energy storage devices. Due to its independent output power and capacity, vanadium battery has the advantages of large power and capacity, long cycle life, high energy efficiency, good deep charge and discharge performance, and high safety performance. Therefore, it is considered to be one of the most promising large batteries. Large-scale energy storage batteries are attracting more and more attention. [0003] As the ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/90
CPCH01M4/8657H01M4/8853H01M4/9041H01M4/9083Y02E60/50
Inventor 陈勇
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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