Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Non-noble metal-catalyzed polymer fibrous membrane hydroborate fuel cell

A polymer fiber and borohydride technology, applied in fuel cells, fuel cell parts, battery pack parts, etc., can solve the problems of proton exchange membrane liquid fuel leakage, high battery cost, and high cost of DBFC , to achieve the effect of suitable ion pass rate, low price and small internal resistance

Inactive Publication Date: 2013-11-06
XI AN JIAOTONG UNIV
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of expensive proton exchange membranes is another reason for the high cost of DBFCs
In order to further reduce the cost of DBFC, Chinese patent CN101388468 introduces a DBFC that abandons the use of proton exchange membranes. This patent uses a membraneless structure instead of an expensive proton exchange membrane as an electrolyte, and uses a non-precious metal catalyst to reduce the cost of the battery. But the output power is low
In general, the use of expensive proton exchange membranes and noble metal catalysts keeps battery costs high
At the same time, there is liquid fuel leakage in the proton exchange membrane, which reduces the efficiency of the battery. Compared with the hydrogen-oxygen fuel cell, the overall output power of DBFC is lower, which is the main problem faced by DBFC

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Non-noble metal-catalyzed polymer fibrous membrane hydroborate fuel cell
  • Non-noble metal-catalyzed polymer fibrous membrane hydroborate fuel cell
  • Non-noble metal-catalyzed polymer fibrous membrane hydroborate fuel cell

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The electrode preparation process is as follows:

[0021] Anode preparation: anode catalysts include CoO, Co(OH) 2 , hydrogen storage alloys, Au and Au alloys, Pt and Pt alloys, one or more of them, with a load of 0.1-200mg cm -2 . The anode catalyst and binder are made into a paste, evenly coated on foamed nickel or carbon paper or carbon cloth, dried in a vacuum and pressed to form a hydrogen electrode, and activated by immersing in a mixed fuel solution before testing.

[0022] There are two options for preparing the cathode:

[0023] 1) Option 1:

[0024] The cathode is composed of a waterproof and breathable layer, a catalyst layer, and a current-collecting layer. The preparation process is as follows:

[0025] The carbon cloth or carbon paper used as the current-collecting layer is treated with 5-60% PTFE hydrophobic treatment, dried, and kept in a muffle furnace at 340°C for 30 minutes to obtain the required waterproof and breathable layer. The cathode cata...

Embodiment 1

[0030] Reference attached figure 2 Shown, respectively (a) La 2 o 3 , (b) CeO 2 , (c)MnO 2, (d) FePc as the cathode catalyst, CoO as the anode catalyst, the discharge curve of the polymer fiber membrane borohydride fuel cell.

[0031] Mix 70mg of anode catalyst CoO and 10mg of binder 30% PTFE, add an appropriate amount of absolute ethanol, adjust it into a paste, and evenly coat it on the nickel foam. After vacuum drying at 80°C, press it into an electrode of 0.6mm, that is The anode was obtained and activated in the mixed fuel solution for 1 h before testing.

[0032] 30% of the cathode catalyst (respectively La 2 o 3 , CeO 2 , MnO 2 , one of FePc), 45% carbon nanotubes, 25% polytetrafluoroethylene and mix evenly, add an appropriate amount of absolute ethanol to disperse, stir to make it into a ball, and coat the ball on the nickel foam Serve and dry. The nickel foam coated with the catalyst and the waterproof and breathable membrane are rolled on a roller machine ...

Embodiment 2

[0035] Reference attached image 3 shown in LaNiO 3 Discharge curves of polymer fiber membrane borohydride fuel cells as cathode catalyst and CoO as anode catalyst.

[0036] The cathode and anode preparation process is as described in Example 1.

[0037] Fuel is 0.8M KBH 4 +6M KOH mixed solution. The cathode oxidant is pure oxygen. Oxygen flow rate is 20ml min -1 . Operating temperature: 25, 60°C. Its maximum output power can reach 350mW cm -2 、663mW cm -2 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a direct hydroborate fuel cell adopting a polymer fibrous membrane. A single cell consists of an anode, the polymer fibrous membrane and a cathode, wherein the anode comprises a waterproof air-permeable layer, a current collection layer and a catalytic layer; the cathode comprises a current collection layer and a catalytic layer; and the polymer fibrous membrane is made from main raw materials such as polyamide fibers, polypropylene fibers, polyvinyl alcohol fibers and the like. The fibrous membrane replaces a naffion membrane in the conventional fuel cell, allows ions to freely pass through, and can effectively decrease the internal resistance of the cell, thereby greatly improving the performance of the cell. The anode and cathode of the cell both adopt non-noble metal catalytic materials, wherein the catalytic material of the anode has the function of reducing oxygen rather than catalyzing the decomposition of hydroborate ions, so that the problem of ion 'crossover' in the conventional fuel cell is solved and a fuel solution is allowed to leak to the anode without influencing the catalysis efficiency of the catalytic material of the anode.

Description

technical field [0001] The present invention relates to the field of fuel cells, a fuel cell structure that directly supplies liquid fuel and air / oxygen from the outside, in particular a novel polymer fiber membrane structure, a fuel cell structure that uses borohydride alkaline liquid as fuel . Background technique [0002] With the increasingly serious energy shortage and environmental deterioration, fuel cells, as an efficient and clean power generation device, have attracted people's attention. A fuel cell is an electrochemical device that continuously converts the chemical energy in the continuously supplied fuel and oxidant into electrical energy. Its main features are: (1) High efficiency: theoretically, the conversion efficiency can reach 75%-100%; (2) Low pollution; (3) Low noise; (4) Wide range of use, flexible and flexible. [0003] A direct borohydride fuel cell (DBFC) is a low temperature fuel cell. DBFC has high theoretical voltage (1.64V), high fuel energy ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M2/16H01M8/1009H01M8/1041
CPCY02E60/12Y02E60/50
Inventor 柳永宁杨晓冬李赛韦潇竹
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com