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A kind of direct borohydride fuel cell cell activation method

A borohydride and fuel cell technology, applied in fuel cells, fuel cell additives, fuel cell control, etc., can solve the problems of high fuel consumption, low fuel utilization, low battery performance, etc., to achieve simple system and eliminate dependence performance and simplify the system

Active Publication Date: 2015-12-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the main problems restricting the development of DBFC include: high cost of borohydride as fuel, insufficient activity of anode catalyst, low fuel utilization rate due to hydrogen evolution caused by anode side reaction, long battery activation time, high fuel consumption, low battery performance, etc.
The longer the activation time, the more borohydride and oxidant used as fuel, the higher the activation cost of the battery, and the longer the period of catalyst screening by battery

Method used

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  • A kind of direct borohydride fuel cell cell activation method
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  • A kind of direct borohydride fuel cell cell activation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Set the effective area to 5cm 2 The single-piece membrane electrode for DBFC and the corresponding flow field plate, current collecting plate and end plate are assembled into a DBFC single cell. The assembly torque of the battery is 2.5Nm. Activate the single cell as follows:

[0056] The first part of the battery settings: (1) Using circulating water to control the battery temperature to 50±1℃; (2) Supplying the battery anode with 2MNaOH stabilized normal temperature sodium borohydride aqueous solution, NaBH 4 The concentration is 1M, the flow rate is 1mlmin -1 ; Pass O to the battery cathode 2 , The inlet pressure is controlled to 0.025±0.002MPa, the battery outlet is O 2 Flow rate control is 17.5±0.5mlmin -1 . The reactant does not circulate;

[0057] The second part of battery activation: (1) Connect the positive and negative terminals of the battery to the corresponding terminal of the electronic load; (2) Connect the terminal of the AC signal generator to the battery,...

Embodiment 2

[0062] Set the effective area to 5cm 2 The single-piece membrane electrode for DBFC and the corresponding flow field plate, current collecting plate and end plate are assembled into a DBFC single cell. The assembly torque of the battery is 2.5Nm. The single cell is activated according to the activation method provided by the present invention.

[0063] The first part of the battery settings: (1) Using circulating water to control the battery temperature to 30±1℃; (2) Supplying the battery anode with an aqueous solution of potassium borohydride stabilized by 0.5M NaOH at room temperature, KBH 4 Concentration is 3M, flow rate is 5mlmin -1 ; Pass 3MH to the battery cathode 2 SO 4 Stable hydrogen peroxide aqueous solution, H 2 O 2 The concentration is 2M, the flow rate is 5mlmin -1 . The reactants are not recycled.

[0064] The second part of battery activation: (1) Connect the positive and negative terminals of the battery to the corresponding terminal of the electronic load; (2) Con...

Embodiment 3

[0069] Set the effective area to 5cm 2 The single-piece membrane electrode for DBFC and the corresponding flow field plate, current collecting plate and end plate are assembled into a DBFC single cell. The assembly torque of the battery is 2.5Nm. The single cell is activated according to the activation method provided by the present invention.

[0070] The first part of the battery settings: (1) Using circulating water to control the battery temperature to 80±1℃; (2) Supplying the battery anode with an aqueous solution of potassium borohydride stabilized by 5MNaOH at room temperature, NaBH 4 The concentration is 0.5M, the flow rate is 3mlmin -1 ; Pass O to the battery cathode 2 , The inlet pressure is controlled to 0.005±0.002MPa, the battery outlet is O 2 Flow rate control is 17.5±0.5mlmin -1 .

[0071] The second part of battery activation: (1) Connect the positive and negative terminals of the battery to the corresponding terminal of the electronic load; (2) Connect the terminal...

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Abstract

The present invention provides a single-cell activation method for a direct borohydride fuel cell (DBFC). The single-cell activation method is characterized by comprising three steps such as initial stage activation, electrochemical alternating current accelerated activation and cell performance testing, has characteristics of rapid electrochemical reaction interface expansion, short activation time, fuel saving, simple system and the like, and is especially suitable for activation of the DBFC with characteristics of low catalyst activity and long activation time.

Description

Technical field [0001] The invention relates to a method for directly activating a single cell of a borohydride fuel cell. Background technique [0002] Direct Borohydride Fuel Cell (DBFC) is a kind of MBH that uses alkali metal borohydride 4 (M=K, Na, Li) is a fuel-generating device. Use borohydride as fuel and oxygen (or hydrogen peroxide) as oxidant. Because DBFC has the advantages of high open circuit voltage and high theoretical energy density of this type of battery, it has received extensive attention in recent years, and related technologies have also developed rapidly. [0003] When the direct borohydride fuel cell works, the fuel sodium borohydride (dissolved in sodium hydroxide solution) and the oxidant oxygen pass through the channels on the end plate to reach the anode and cathode of the battery, and the reactants reach the electrode catalyst through the diffusion layer on the electrode. In the reactive center of the layer, borohydride undergoes an electrochemical re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/08H01M8/04H01M8/00H01M8/04298
CPCH01M8/04223H01M8/083Y02E60/50
Inventor 张华民邱艳玲曲超张凤祥
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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