GB/T 45332-2025 Proton exchange membrane for hydrogen production via water electrolysis
1 Scope
This standard specifies classification and designation, technical requirements, test method, inspection rules as well as marking, packaging, transportation and storage of proton exchange membrane for hydrogen production via water electrolysis.
This document is applicable to the scientific research, production, use and management of proton exchange membranes used in hydrogen production systems via water electrolysis.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 20042.3-2022 Proton exchange membrane fuel cell - Part 3: Test method for proton exchange membrane
GB/T 36363-2018 Polyolefin separator for lithium-ion battery
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 20042.3-2022 and the following apply.
3.1
proton exchange membrane; PEM
Polymer electrolyte membranes with protons as conductive charges
[Source: GB/T 20042.1-2017, 2.1.9]
3.2
proton exchange membrane for hydrogen production via water electrolysis
solid polymer electrolyte that conducts only protons and isolates hydrogen and oxygen in the electrolyzer for hydrogen production via water electrolysis
3.3
swelling rate
dimensional changes in the horizontal, longitudinal and thickness directions of the solution-impregnated membrane relative to the dry membrane, under the given conditions
Note 1: Dimensional changes in horizontal direction, longitudinal direction and thickness direction are recorded as swelling rate in TD, MD and Z directions, respectively.
Note 2: The swelling rate is expressed as a percentage.
[Source: GB/T 20042.3-2022, 3.10, modified]
3.4
proton conductivity
ability of a membrane to conduct protons, which is the reciprocal of resistivity
Note 1: Proton conductivity is an electrochemical index to measure the proton conduction ability of a membrane, which reflects the proton migration ability in the membrane.
Note 2: The unit of proton conductivity is Siemens per centimeter (S/cm).
[Source: GB/T 20042.3-2022, 3.1]
3.5
puncture strength
maximum force required for the puncture needle to penetrate the membrane specimen per unit thickness vertically
3.6
hydrogen permeation rate
volume of hydrogen gas that passes through a unit area of the specimen in unit time under a constant temperature and a unit pressure difference when the permeation reaches a stable state
Note: The hydrogen permeation rate is expressed as the volume value at standard temperature and pressure. The unit is cubic centimeters per square meter per day per pascal [cm³/(m²·d·Pa)].
4 Classification and designation
Proton exchange membranes for hydrogen production via water electrolysis are divided into the following two categories by whether they contain reinforcing materials.
—Non-reinforced membranes, classified by nominal thickness:
● Class I: 50 μm~130 μm;
● Class II: >130 μm~170 μm;
● Class III: >170 μm.
—Reinforcing membranes: 50 μm~100 μm.
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation
5 Technical requirements
5.1 Appearance
5.2 Limit deviation of thickness and average deviation of thickness
5.3 Performance indicator
6 Test methods
6.1 Conditioning of specimen
6.2 Appearance
6.3 Limit deviation of thickness and average deviation of thickness
6.4 Tensile strength, tensile strain at break, and elastic modulus
6.5 Swelling rate
6.6 Puncture strength
6.7 Planar proton conductivity
6.8 Normal proton conductivity
6.9 Hydrogen permeation rate
7 Inspection rules
7.1 Inspection classification
7.2 Batching rules
7.3 End-of-manufacturing inspection
7.4 Type inspection
8 Marking, packaging, transportation and storage
8.1 Marking
8.2 Packaging
8.3 Transportation
8.4 Storage
Bibliography
