CN203561649U - Measuring clamp used for proton conductivity of proton exchange membrane - Google Patents
Measuring clamp used for proton conductivity of proton exchange membrane Download PDFInfo
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- CN203561649U CN203561649U CN201320625421.4U CN201320625421U CN203561649U CN 203561649 U CN203561649 U CN 203561649U CN 201320625421 U CN201320625421 U CN 201320625421U CN 203561649 U CN203561649 U CN 203561649U
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- sleeve
- electrode
- bottom electrode
- top electrode
- proton conductivity
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Abstract
The utility model discloses a measuring clamp used for the proton conductivity of a proton exchange membrane. The measuring clamp comprises an upper electrode, a lower electrode, a sleeve, an upper tab and a lower tab. The sleeve is cylinder-shaped, and the bottom part of the sleeve is sealed. The upper electrode is a cylindrical structure provided with a projection. The projection is cylinder-shaped and arranged at the middle part of the lower part of the cylindrical structure. The lower surface of the projection is plated with platinum and serves as a lower electrode platinum plating test surface. The upper electrode is arranged in the sleeve and is movably connected with the sleeve. The lower electrode is cylinder-shaped, the upper surface of the lower electrode is plated with platinum and serves as an upper electrode platinum plating test surface. The lower electrode is arranged at the center of the bottom part of the sleeve. The upper end of the upper electrode and the lower end of the lower electrode are respectively provided with the upper tab and the lower tab. The upper electrode, the lower electrode and the sleeve are coaxial. By adopting the measuring clamp, the pressure on the surface of the proton exchange membrane remains stable in each measurement, the situation of unstable measuring data caused by human factors is eliminated, and the relative accuracy of the measurement is ensured.
Description
Technical field
The utility model relates to a kind of measured material of conductivity, particularly relates to a kind of measured material for PEM proton conductivity, is a kind of measured material that adopts AC impedence method test PEM proton conductivity.
Technical background
Proton Exchange Membrane Fuel Cells (PEMFC) is used PEM (PEM) to do electrolyte, and its performance directly affects battery performance, energy efficiency and the serviceable life of PEMFC.And the proton conductivity of phosphoric acid of PEM is an important indicator weighing PEM (PEM) performance.
The development of measuring technique roughly can be divided into 3 kinds, comprises direct current scanning method, AC impedence method and coaxial probe method.Wherein two electrode AC impedance methods are because equipment needed thereby is simple, simple to operate, measure quick, and measurement is the lateral resistance of PEM, though the impact in low-frequency range due to interface impedance, the absolute precision of its film resistance recording is poor, but substantially can meet research needs, by numerous researchers are adopted.
Adopt the proton conductivity of two electrode AC impedance methods tests PEMs to have two kinds of methods, a kind of principal feature of method is that platinum electrode is immersed in mercury, realizes contacting of electrode and film with mercury cell.But the method is not easy to operate, the mercury of use is also harmful to health.
Another kind of method of testing for membrane sample to be measured is used, bottom electrode clamps, upper and lower electrode connects respectively the calibrating terminal of electrochemical workstation, adopts AC impedence method to measure, frequency 1～10
6hz, disturbance voltage 10mV.The proton conductivity of PEM can calculate by following formula:
In formula, l is thickness (cm), the resistance (Ω) that R is film, the useful area (cm that A is film
2), the proton conductivity (S/cm) that σ is film.In fact the useful area A of film is exactly the area of electrode surface.Thickness l adopts spiral dial gauge (precision is 0.01mm) to measure.AC impedance Nyquist (Nyquist) figure that resistance R value is recorded by electrochemical workstation obtains.In AC impedance Nyquist (Nyquist) figure, impedance Z=Z '+jZ ", Z ' (transverse axis) is real impedance, Z, and " (longitudinal axis) is imaginary impedance.Owing to having eliminated the impact of interface capacitance in high-frequency range, it is linear that the resistance value of PEM is substantially, and the corresponding numerical value of intersection point of this straight line and Z ' axle is the resistance value of PEM.The subject matter of the method is to fix upper and lower electrode by bolt arrangement, and it is aligned, and according to the strength size of test person own, skill level, determines the pressure of film to be measured, and randomness is larger, and test result is subject to man's activity more.
Utility model content
It is a kind of simple in structure that the purpose of this utility model is to provide, and measurement result is accurately for the measured material of PEM proton conductivity.
The utility model object is achieved through the following technical solutions:
For the measured material of PEM proton conductivity, it is characterized in that comprising top electrode, bottom electrode, sleeve, upper lug and lower lug; Sleeve is cylindrical shape, and sealed bottom powers on very with protruding column construction, and projection is cylindrical, is positioned at the lower central of column construction, and the lower surface platinum plating of projection, is bottom electrode platinum plating test surfaces, and top electrode is positioned at sleeve, is flexibly connected with sleeve; Bottom electrode is cylindrical structural, and the upper surface platinum plating of bottom electrode is top electrode platinum plating test surfaces, and bottom electrode is arranged in sleeve bottom centre, and the upper end of top electrode and the lower end of bottom electrode are respectively equipped with lug and lower lug; Top electrode, bottom electrode and sleeve are coaxial configuration.
Preferably, be positioned on the sleeve in bottom electrode and top electrode high spot outside and offer view window.The bottom of described bottom electrode and sleeve is affixed.Described top electrode and bottom electrode are stainless steel preparation.Described sleeve is engineering plastics preparations.
With respect to prior art, the utlity model has following advantage:
1) when test the constant pressure that bears of film to be measured, i.e. self suffered gravity of top electrode.And can on electrode, add as required counterweight, increase film pressure to be measured.
2) upper and lower electrode and sleeve are coaxial configuration, and upper and lower electrode relative position is stable, needn't rely on manual operation alignment, can reduce personal error.
Accompanying drawing explanation
Fig. 1 the utility model is for the front elevation of the measured material of PEM proton conductivity.
The vertical view of this Fig. 1 of Fig. 2.
The left view of this Fig. 1 of Fig. 3.
Shown in figure: 1-top electrode, 2-bottom electrode, 3-sleeve, the upper lug of 4-, lug under 5-, 6-view window, 7-bottom electrode platinum plating test surfaces, 8-top electrode platinum plating test surfaces.
Embodiment
For understanding better the utility model, below in conjunction with accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
As shown in Figure 1, 2, 3, for the measured material of PEM proton conductivity, comprise top electrode 1, bottom electrode 2, sleeve 3, upper lug 4 and lower lug 5; Sleeve 3 is cylindrical shape, sealed bottom, and top electrode 1 is with protruding column construction, projection is cylindrical, is positioned at the lower central of column construction, the lower surface platinum plating of projection, for bottom electrode platinum plating test surfaces 7, top electrode 1 is positioned at sleeve 3, is flexibly connected with sleeve 3; Bottom electrode 2 is cylindrical structural, and the upper surface platinum plating of bottom electrode 2 is top electrode platinum plating test surfaces 8, and bottom electrode 2 is arranged in sleeve 3 bottom centre, and preferably, bottom electrode 2 is affixed with the bottom of sleeve 3; The lower end of the upper end of top electrode 1 and bottom electrode 2 is respectively equipped with lug 4 and lower lug 5.Between bottom electrode 2 and top electrode 1 projection for placing PEM to be tested; Be positioned at bottom electrode 2 and offer view window 6 with the sleeve 3 in top electrode 1 high spot outside.Top electrode 1, bottom electrode 2 are coaxial configuration with sleeve 3.
Top electrode 1 and bottom electrode 2 are stainless steel, and the test surface of contact platinum plating of top electrode 1 and bottom electrode 2, to reduce interface resistance.Sleeve 3 is engineering plastics preparation.
Bottom electrode 2 and sleeve 3 are fixed together, and top electrode 1 can slide along sleeve lining, and top electrode 1 relies on self gravitation to produce pressure to test specimens, clamp PEM to be measured, and the upper surface of top electrode 1 can also be placed counterweight, to increase test pressure.Sleeve 3, for engineering plastics preparation, separates top electrode 1 and bottom electrode 2 on the one hand, makes its insulation; Can guarantee that on the other hand top electrode 1 is parallel and relatively fixing with bottom electrode 2 test surfaces positions, sleeve 3 sides have view window 6, for placing, observe sample.Upper lug 4 and lower lug 5 are for connecting test instrument.Coordinate milscale, can record sample thickness simultaneously.
Fixture is vertically put well, get sample to be tested and be cut into 1.5cm × 1.5cm area fritter sample to be tested, be placed horizontally between the test surfaces of electrode 1 and bottom electrode 2, top electrode is slowly put down along sleeve lining, according to himself weight, be pressed in the upper surface of sample to be tested, put appropriate after, the calibrating terminal of electrochemical workstation is connected on upper lug 4 and lower lug 5, adopt AC impedence method to measure, frequency 1～10
6hz, disturbance voltage 10mV, thickness, by miking, passes through formula
can be calculated the proton conductivity of PEM.In formula, the thickness (cm) that l is PEM to be measured, the resistance (Ω) that R is film, the useful area (cm that A is film
2), the proton conductivity (S/cm) that σ is PEM to be measured.In fact the useful area A of film is exactly the area of bottom electrode upper surface.The thickness l that surveys PEM adopts spiral dial gauge (precision is 0.01mm) to measure.AC impedance Nyquist (Nyquist) figure that resistance R value is recorded by electrochemical workstation obtains.
In the figure of AC impedance Nyquist (Nyquist), impedance Z=Z '+jZ ", Z ' (transverse axis) is real impedance, Z, and " (longitudinal axis) is imaginary impedance.Owing to having eliminated the impact of interface capacitance in high-frequency range, it is linear that the resistance value of PEM is substantially, and the corresponding numerical value of intersection point of this straight line and Z ' axle is the resistance value of PEM.
The utility model, the constant pressure that during test, film to be measured bears, i.e. self suffered gravity of top electrode.And can on electrode, add as required counterweight, increase film pressure to be measured.Top electrode 1, bottom electrode 2 are coaxial configuration with sleeve 3, and top electrode 1, bottom electrode 2 relative positions are stablized, and needn't rely on manual operation alignment, can reduce personal error.Top electrode can slide along sleeve lining, relies on Action of Gravity Field to clamp PEM to be measured.It is stable that the pressure that in the time of can making to measure by the measured material for PEM proton conductivity, bear on film surface at every turn keeps, and got rid of the unsettled situation of the measurement data causing because of human factor, guaranteed the relative accuracy of measuring.
Claims (5)
1. for the measured material of PEM proton conductivity, it is characterized in that: comprise top electrode, bottom electrode, sleeve, upper lug and lower lug; Sleeve is cylindrical shape, and sealed bottom powers on very with protruding column construction, and projection is cylindrical, is positioned at the lower central of column construction, and the lower surface platinum plating of projection, is bottom electrode platinum plating test surfaces, and top electrode is positioned at sleeve, is flexibly connected with sleeve; Bottom electrode is cylindrical structural, and the upper surface platinum plating of bottom electrode is top electrode platinum plating test surfaces, and bottom electrode is arranged in sleeve bottom centre, and the upper end of top electrode and the lower end of bottom electrode are respectively equipped with lug and lower lug; Top electrode, bottom electrode and sleeve are coaxial configuration.
2. the measured material for PEM proton conductivity according to claim 1, is characterized in that: be positioned on the sleeve in bottom electrode and top electrode high spot outside and offer view window.
3. the measured material for PEM proton conductivity according to claim 1, is characterized in that: the bottom of described bottom electrode and sleeve is affixed.
4. the measured material for PEM proton conductivity according to claim 1, is characterized in that: described top electrode and bottom electrode are stainless steel preparation.
5. the measured material for PEM proton conductivity according to claim 1, is characterized in that: described sleeve is engineering plastics preparations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625421.4U CN203561649U (en) | 2013-10-10 | 2013-10-10 | Measuring clamp used for proton conductivity of proton exchange membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625421.4U CN203561649U (en) | 2013-10-10 | 2013-10-10 | Measuring clamp used for proton conductivity of proton exchange membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203561649U true CN203561649U (en) | 2014-04-23 |
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ID=50511363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320625421.4U Expired - Fee Related CN203561649U (en) | 2013-10-10 | 2013-10-10 | Measuring clamp used for proton conductivity of proton exchange membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203561649U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728472A (en) * | 2013-10-10 | 2014-04-16 | 华南理工大学 | Fixture for measurement of electrical conductivity of proton exchange membrane |
| CN106771629A (en) * | 2017-02-15 | 2017-05-31 | 济南大学 | A kind of fixture for the test of proton exchange membrane conductivity |
-
2013
- 2013-10-10 CN CN201320625421.4U patent/CN203561649U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728472A (en) * | 2013-10-10 | 2014-04-16 | 华南理工大学 | Fixture for measurement of electrical conductivity of proton exchange membrane |
| CN106771629A (en) * | 2017-02-15 | 2017-05-31 | 济南大学 | A kind of fixture for the test of proton exchange membrane conductivity |
| CN106771629B (en) * | 2017-02-15 | 2023-10-27 | 济南大学 | Clamp for proton exchange membrane conductivity test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20161010 |