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Bipolar membrane type direct borohydride fuel cell

A borohydride and fuel cell technology, applied in fuel cells, fuel cell parts, circuits, etc., can solve problems such as borohydride leakage and lack of stability, reduce polarization loss, eliminate mixed potential, The effect of avoiding attrition

Active Publication Date: 2018-02-16
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current commercial anion membranes do not have sufficient stability in strong alkaline media. At the same time, the use of anion exchange membranes has the problem of borohydride leakage from the anolyte to the catholyte.

Method used

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  • Bipolar membrane type direct borohydride fuel cell
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of bipolar membrane type direct borohydride fuel cell, the preparation process of used bipolar membrane is: 2 millimoles polyvinylpyrrolidone is dissolved in water, makes the polyvinylpyrrolidone aqueous solution that concentration is 2mmol / L, then 20 Add millimole of nickel nitrate into polyvinylpyrrolidone aqueous solution, stir evenly, and prepare the membrane solution of the intermediate interface layer. Take a piece of anion-exchange membrane (JAM-Ⅱ-07, Beijing Jierui), and evenly coat a layer of intermediate interface layer membrane solution on the surface of the anion-exchange membrane. After drying for 2 minutes, apply Nafion 212 ion-exchange membrane (DuPont Company) Press on it, heat press at 0.5MPa 60° C. for 2 minutes to prepare a bipolar membrane, and store the prepared bipolar membrane in ultrapure water for future use.

[0039] Using the prepared bipolar membrane as a diaphragm, the battery performance was evaluated directly in the sodium borohydri...

Embodiment 2

[0041] A bipolar membrane type direct borohydride fuel cell, the electrolyte diaphragm is a bipolar membrane, and the preparation process of the used bipolar membrane is as follows: 2 mmol of polyvinylpyrrolidone is dissolved in water to make a concentration of 2mmol / L polyvinylpyrrolidone aqueous solution, and then add 20 millimoles of cobalt nitrate into the polyvinylpyrrolidone aqueous solution, and stir evenly to prepare the intermediate interface layer film liquid. Take a piece of anion exchange membrane (TWEDAI, Shandong Tianwei), and evenly coat a layer of intermediate interface layer membrane liquid on the surface of the anion exchange membrane. Hot pressing at 60° C. for 2 minutes to prepare a bipolar membrane, and store the prepared bipolar membrane in ultrapure water for later use.

[0042] Using the prepared bipolar membrane as a diaphragm, the battery performance was evaluated directly in the sodium borohydride-hydrogen peroxide fuel cell system at room temperatur...

Embodiment 3

[0044] A bipolar membrane type direct borohydride fuel cell, the electrolyte diaphragm is a bipolar membrane, and the preparation process of the used bipolar membrane is as follows: 2 mmol of polyvinylpyrrolidone is dissolved in water to make a concentration of 2mmol / L polyvinylpyrrolidone aqueous solution, and then add 20 millimoles of ferric nitrate into the polyvinylpyrrolidone aqueous solution, and stir evenly to obtain the intermediate interface layer film liquid. Take a piece of anion-exchange membrane (HAM concentrated type, Yichen Technology), and evenly coat a layer of intermediate interface layer membrane solution on the surface of the anion-exchange membrane. After drying for 2 minutes, press Nafion 117 ion-exchange membrane (DuPont Company) on On it, hot press at 0.5 MPa at 60° C. for 2 minutes to prepare a bipolar membrane, and store the prepared bipolar membrane in ultrapure water for future use.

[0045] Using the prepared bipolar membrane as a diaphragm, the ba...

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Abstract

Disclosed is a bipolar membrane type direct borohydride fuel cell. The bipolar membrane type direct borohydride fuel cell comprises at least one cell unit; each cell unit consists of two layers of solid-state electrolyte membranes with ion selectivity transmission property; the solid-state electrolyte membranes are divided into two parts by the bipolar membrane; and the bipolar membrane adopts a three-layer structure which includes a cation exchange membrane layer, an anion exchange membrane layer and an intermediate interface layer positioned between the two exchange membrane layers. By adoption of the bipolar membrane type direct borohydride fuel cell, the negative electrode and the positive electrode can adopt non-uniform electrolytes, and a mixed potential caused by permeation of an intermediate product generated by the positive electrode fuel or the positive electrode to the negative electrode can be prevented; and meanwhile, permeation of a negative electrode product to the positive electrode also can be prevented, polarization loss of the electrode is lowered, the mixed potential is eliminated, and the fuel utilization rate and the output power are improved.

Description

technical field [0001] The invention relates to an alkaline fuel cell directly fed in a full liquid state, in particular to a direct borohydride fuel cell using alkaline borohydride solution as fuel and acidic hydrogen peroxide as oxidant. Background technique [0002] Proton exchange membrane fuel cell (proton exchange membrane fuel cell, PEMFC) is a power generation device that directly converts the chemical energy stored in hydrogen fuel and oxidant into electrical energy through electrochemical reactions. With the advantages of high density, it has broad application prospects in the fields of mobile power sources and fixed power stations, especially as a vehicle energy source and portable power source. However, proton exchange membrane fuel cells using hydrogen as fuel have fuel supply, storage and transportation problems and subsequent dangers during use, forcing people to turn their attention to liquid fuels that can be directly electrochemically oxidized, such as meth...

Claims

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Application Information

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IPC IPC(8): H01M8/0245H01M8/0289
CPCH01M8/0245H01M8/0289Y02E60/50
Inventor 段东红陈良卫慧凯刘世斌李庆福徐守冬张鼎
Owner TAIYUAN UNIV OF TECH
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