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A Bipolar Membrane 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 improving fuel efficiency

Active Publication Date: 2021-08-17
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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  • A Bipolar Membrane Direct Borohydride Fuel Cell
  • A Bipolar Membrane Direct Borohydride Fuel Cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A bipolar membrane-type direct borohydride fuel cell, the preparation process of the bipolar membrane used: 2 mmmol polyvinylpyrrolidone is dissolved in water, and the aqueous solution of polyvinylpyrrolidone having a concentration of 2 mmol / L is fabricated, and then 20 Moistrate nickel nickel nickel is added to a water solution of polyvinylpyrrolidone, and stir evenly, the intermediate interface layer membrane is obtained. Take a piece of anion exchange membrane (JAM-II-07, Beijing Jie Rui), uniformly coated on the surface of the anion exchange membrane, and after drying for 2 minutes, the Nafion 212 ion exchange film (Dupont) On it, it was hot for 2 minutes at 0.5 MPa 60 ° C, and the bipolar film was obtained, and the prepared bipolar membrane was stored in ultrapure water.

[0039] With the obtained bipolar film as a diaphragm, the battery performance evaluation is performed at room temperature, the battery performance evaluation is performed. The open circuit voltage ...

Embodiment 2

[0041] A bipolar membrane type direct borohydride fuel cell, the electrolytic liquid separator is a bipolar film, and the preparation process of the bipolar membrane used is: 2 mmmmol polyvinylpyrrolidone is dissolved in water, and the concentration is 2 mmol / L. Polyvinylpyrrolidone aqueous solution, then 20 mmorate cobalt glycobalt is added to a water solution of polyvinylpyrrolidone, and the intermediate interface layer membrane is produced even after stirring. Take a piece of anion exchange membrane (Twedai, Shandong Tianwei), evenly coated with an intermediate interface layer membrane solution on the surface of the anion exchange membrane, after drying for 2 minutes, pressing the Nafion 115 ion exchange membrane on it, at 0.5 MPa At 60 ° C for 2 minutes, a bipolar film was obtained, and the prepared bipolar membrane was stored in ultrapure water.

[0042] With the obtained bipolar film as a diaphragm, the battery performance evaluation is performed at room temperature, and t...

Embodiment 3

[0044] A bipolar membrane type direct borohydride fuel cell, the electrolytic liquid separator is a bipolar film, and the preparation process of the bipolar membrane used is: 2 mmmmol polyvinylpyrrolidone is dissolved in water, and the concentration is 2 mmol / L. Polyvinylpyrrolidone aqueous solution, and then add 20 mmolitrate iron to aqueous solution of polyvinylpyrrolidone, stir well and uniformly produce an intermediate interface layer membrane. Take a piece of anion exchange membrane (HAM concentrate, Yi Chen Technology), uniformly coated on the surface of the anion exchange membrane, and after drying for 2 minutes, press the Nafion 117 ion exchange film (Dupont) On it, it was 2 minutes at 0.5 MPa 60 ° C, and the bipolar film was obtained, and the prepared bipolar membrane was stored in ultrapure water.

[0045] With the obtained bipolar film as a diaphragm, the battery performance evaluation is performed at room temperature, and the battery performance evaluation is perform...

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Abstract

The invention provides a bipolar membrane type direct borohydride fuel cell, comprising at least one battery unit, the battery unit includes a solid electrolyte membrane with ion-selective permeation characteristics; the battery unit is separated into two parts by the solid electrolyte membrane; The solid electrolyte membrane is a bipolar membrane, and the bipolar membrane is a three-layer structure composed of a cation exchange membrane layer, an anion exchange membrane layer and an intermediate interface layer between the two. The present invention adopts the bipolar membrane direct borohydride fuel cell, the cathode and the anode can adopt heterogeneous electrolyte, and can prevent the intermediate product produced by the anode fuel or the anode from penetrating into the cathode to generate a mixed potential, and can also prevent the cathode product from penetrating into the cathode. The anode reduces the polarization loss of the electrode, eliminates the mixed potential, and improves the fuel utilization rate and output power.

Description

Technical field [0001] The present invention relates to an alkaline fuel cell directly in liquid feed, in particular a direct borohydride fuel cell using a basic borohydride solution as a fuel, acidic hydrogen peroxide is an oxidant. Background technique [0002] Proton Exchange Membrane Fuel Cell, PEMFC) is a power generation device that stores chemical energy stored in a hydrogen fuel and an oxidant by electrochemical reaction into a power generating device, which has cleaning, efficient, room temperature, and power. Advantages of high density, have broad application prospects in the fields of mobile power and fixed power plants, especially as automotive energy and portable power supplies. However, there is a fuel supply, storage, and transport challenge of the prismatic fuel cell for fuel, and the subsequent risk of the use process, forcing people to turn the attention to electrochemically oxidized liquid fuel, such as methanol, ethanol, and two. Methyl ether, borohydride, etc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0245H01M8/0289
CPCH01M8/0245H01M8/0289Y02E60/50
Inventor 段东红陈良李居英卫慧凯刘世斌李庆福徐守冬张鼎
Owner TAIYUAN UNIV OF TECH
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