Standard No.:	GB/T 47029-2026
English Name:	Test method for physical properties of supercapacitor electrode
Chinese Name:	超级电容器电极片物理性能测试方法
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2026-01-28
Implemented on:	2026-8-1
Status:	to be valid
Target Language:	English
File Format:	PDF
Word Count:	12500 words
Translation Price(USD):	375.0
Delivery:	via email in 1~5 business day

GB/T 47029-2026 Test method for physical properties of supercapacitor electrode English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 47029-2026 Test method for physical properties of supercapacitor electrode 超级电容器电极片物理性能测试方法 Issue date: 2026-01-28 Implementation date: 2026-08-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative References 3 Terms and Definitions 4 Test Conditions 5 Test Methods 5.1 Appearance 5.2 Burrs 5.3 Thickness 5.4 Areal Density 5.5 Compaction Density 5.6 Rebound Performance 5.7 Resistivity 5.8 Electrolyte Absorption Performance 5.9 Coating Peel Strength 5.10 Bending Performance 6 Test Report Test Methods for Physical Properties of Supercapacitor Electrode Sheets 1 Scope This document describes the test methods for the physical properties of supercapacitor electrode sheets, including appearance, burrs, thickness, areal density, compaction density, rebound performance, resistivity, electrolyte absorption performance, coating peel strength, and bending performance. This document applies to the physical property testing of supercapacitor electrode sheets. Physical property testing of other types of electrode sheets may refer to this document. 2 Normative References The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 6742 Paints and varnishes — Bend test (cylindrical mandrel) GB/T 9286 Paints and varnishes — Cross-cut test GB/T 22638.10 Test methods for aluminium and aluminium alloy foils — Part 10: Determination of coating surface density SJ/T 11861—2024 Terminology of supercapacitors 3 Terms and Definitions For the purposes of this document, the terms and definitions given in SJ/T 11861—2024 and the following apply. 3.1 supercapacitor; ultracapacitor An electrochemical energy storage device where at least one electrode primarily stores energy through the electric double layer capacitance formed at the electrode/electrolyte interface or pseudocapacitance formed by rapid redox reactions on the electrode surface. The relationship curve between time and voltage during constant current charging or discharging is typically approximately linear. 3.2 electrode In a supercapacitor, a component that is electrically connected to one terminal of the capacitor cell, forms electrical contact with the supercapacitor electrolyte, and where chemical or physical reactions occur. 4 Test Conditions 4.1 Unless otherwise specified, all tests shall be carried out under standard atmospheric conditions for testing. a) Temperature: 15 °C to 35 °C. b) Relative humidity: 25% to 75%. c) Atmospheric pressure: 86 kPa to 106 kPa. 4.2 When measurements are carried out under other environmental conditions, it shall be stated in the test report. 5 Test Methods 5.1 Appearance Visually inspect the surface condition of the electrode sheet under natural light, recording any anomalies such as contamination, oil stains, foreign matter, scratches, wrinkles, arching degree, powder shedding, and foil exposure. 5.2 Burrs 5.2.1 Principle of the Method Under an optical microscope, using the current collector (i.e., the uncoated area) as the baseline, measure the height of metal protrusions extending from the current collector outward (upward or downward) from the electrode sheet. Alternatively, for coated areas, measure the height of metal protrusions extending from the coating outward (upward or downward) from the electrode sheet (as shown in Figure 1). 5.2.2 Instruments and Equipment The equipment and requirements for burr testing are as follows: a) Optical microscope, with a minimum observable dimension of 1 μm; b) Equipped with a transparent fixture to observe the cross-sectional state of the electrode sheet. 5.2.3 Test Procedure The test shall be carried out according to the following process: a) Take the electrode sheet to be tested after slitting (should include both the uncoated foil area and the coated area), and gently wipe the edge powder from the electrode sheet using a brush or soft cloth; b) Using the fixture, fix the electrode sheet perpendicular to the optical microscope stage in the width direction. Use the optical microscope to observe and measure the burrs in the uncoated foil area and the coated area of the electrode sheet (observe at least 3 locations per area). 5.3 Thickness 5.3.1 Principle of the Method Along the direction parallel to the coating machine direction and perpendicular to the coating machine direction, measure the thickness at multiple positions on the electrode sheet at equal intervals. The average value of the test points is taken as the thickness value of the electrode sheet. The standard deviation of the test points is used as a reference for the uniformity of the coating thickness. 5.3.2 Instruments and Equipment The instruments and equipment requirements for thickness testing are as follows: a) Thickness gauge: Maximum permissible error less than or equal to 1 μm1μm; b) Ruler, range 0 cm0cm to 25 cm25cm. 5.3.3 Test Procedure The test shall be carried out according to the following process: a) For the electrode sheet to be tested, cut it along the direction parallel to the machine direction into test pieces with a width of 5 cm5cm and a length equal to the coating width, at equal intervals, totaling mm pieces (m≥3m≥3 pieces), as shown in Figure 2.