IEC TS 62607-4-9:2026

IEC TS 62607-4-9 ®
Edition 1.0 2026-07
TECHNICAL
SPECIFICATION
Nanomanufacturing - Key control characteristics -
Part 4-9: Nano-enabled energy storage - Electrochemical characteristics of
carbon nanomaterial for the electrodes of electric double-layer capacitors: Coin
cell preparation
ICS 07.120  ISBN 978-2-8327-1355-6

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CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions, acronyms and abbreviated terms . 6
3.1 Terms and definitions. 6
3.2 Acronyms and abbreviated terms . 9
4 General . 9
4.1 Coin-cell EDLC preparation principle . 9
4.2 Description of measurement equipment/apparatus . 9
4.3 Standard atmospheric conditions . 10
4.4 Supporting materials . 10
5 Assembling procedure . 10
5.1 Pre-treatment of the electrode material . 10
5.2 Electrode slurry making . 11
5.2.1 Design . 11
5.2.2 Weighing . 11
5.2.3 Mixing . 11
5.3 Coating . 12
5.3.1 Measure the thickness and surface density of the current collector . 12
5.3.2 Electrode coating . 12
5.4 Rolling . 13
5.5 Cutting and weighing . 13
5.6 Drying . 13
5.7 Assembling . 14
5.7.1 Pre-treatment of the cell components . 14
5.7.2 Assembling . 14
5.8 Standing . 14
6 Data to be recorded . 14
6.1 General . 14
6.2 Sample information . 14
6.3 Assembly conditions . 14
6.4 Assembly information and data . 15
Annex A (informative) Data recording . 16
A.1 Format of the record . 16
A.2 Format of assembly information and data . 16
Annex B (informative) Structure of the coin cell. 18
Annex C (informative) Case study – Nanoporous activated carbon . 19
C.1 Coin cells preparation . 19
C.1.1 Pre-treat of material . 19
C.1.2 Slurry mixing . 19
C.1.3 Coating . 20
C.1.4 Rolling, cutting and weighing . 22
C.1.5 Drying . 23
C.1.6 Assembling . 23
C.1.7 Standing . 25
C.2 Data recording . 25
Bibliography . 27

Figure B.1 – Components and stacking structure for the coin-cell EDLC . 18
Figure C.1 – Drying active material and conductor . 19
Figure C.2 – Slurry preparation . 20
Figure C.3 – The coating process of electrodes . 21
Figure C.4 – Electrode cutting and weighing . 22
Figure C.5 – Electrode drying . 23
Figure C.6 – Assembly process of coin-cell EDLCs . 25

Table 1 – Key measurement equipment/apparatus . 9
Table A.1 – Sample identification (according to IEC 62565-5-1) . 16
Table A.2 – Slurry information . 16
Table A.3 – Current collector and separator information . 16
Table A.4 – Electrode disc information . 17
Table A.5 – Electrolyte information . 17
Table A.6 – Coin-cell EDLC information . 17
Table C.1 – Mass of disc electrode . 20
Table C.2 – The mass of electrode disc . 23
Table C.3 – Product identification . 25
Table C.4 – Slurry information . 25
Table C.5 – Current collector and separator Information . 26
Table C.6 – Electrode disc Information . 26
Table C.7 – Electrolyte Information . 26
Table C.8 – Coin cell Information . 26

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Nanomanufacturing - Key control characteristics -
Part 4-9: Nano-enabled energy storage - Electrochemical characteristics
of carbon nanomaterial for the electrodes of electric double-layer
capacitors: Coin cell preparation

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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shall not be held responsible for identifying any or all such patent rights.
IEC TS 62607-4-9 has been prepared by IEC technical committee 113: Nanotechnology for
electrotechnical products and systems. It is a Technical Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
113/960/DTS 113/984/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC TS 62607 series, published under the general title
Nanomanufacturing - Key control characteristics, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
INTRODUCTION
Electrochemical capacitors are widely used in electric vehicles, high-speed trains, aviation,
photovoltaics, wind power and electronics, due to their ultra-fast charge/discharge capability,
long cycle life, wide working temperature range, high safety and reliability and low maintenance
costs.
Electric double-layer capacitors (EDLCs) are a type of electrochemical capacitors. The
mechanism of energy storage for EDLCs relies on reversible ion adsorption at the active
material-electrolyte interface. Therefore, materials with large specific surface area – such as
nanoporous carbon materials – are commonly employed as active materials in EDLCs.
Additionally, to improve the electrode conductivity, high-conductivity materials (e.g. carbon
black, graphene, and carbon nanotubes/CNTs) serve as conductive agents in EDLCs. Thus,
carbon nanomaterials play an irreplaceable and critical role in EDLCs, directly determining their
electrochemical performance.
The electrochemical performance of carbon nanomaterials for EDLCs requires proper
electrochemical characterization. Prior to such measurements, the carbon nanomaterials will
be pre-assembled into devices such as coin cells, three-electrode cells, or cylindrical
cells. Coin-cell-based characterization offers advantages including low cost, versatility, and
high efficiency, making it widely used in both academic and industrial settings.
The assembly process of a coin-cell EDLC is time-consuming and complex, which typically
involves electrode slurry preparation, slurry coating onto current collectors, electrode rolling,
cutting the rolled electrodes into multiple electrode discs, and final EDLC assembly. Each step
contains numerous factors that can exert a significant impact on the accuracy of subsequent
electrochemical performance characterization of the materials. Therefore, standardizing the
coin-cell preparation process is an essential prerequisite for achieving accurate, highly
reproducible, and repeatable electrochemical performance determination.
This document introduces a standard method and process to assemble the coin-cell EDLCs of
carbon nanomaterials.
1 Scope
This part of IEC TS 62607 establishes a standardized method for assembling
– coin-cell EDLCs
in order to characterize the electrochemical key control characteristic of carbon nanomaterials.
The coin-cell EDLC is fabricated through sequential steps: electrode slurry preparation (mixing),
coating, rolling, cutting, weighing, and final assembly.
– The document specifies the assembly process and data recording.
– The document is applicable for carbon nanomaterials used in EDLC as active material or
conductive agents, such as nanoporous activated carbon, carbon aerogel, carbon nanotube,
carbon black, graphene, nano graphite sheet, vapour-grown carbon fibre and so on.
– Typical application areas of this method are research, manufacturer and downstream user
to guide material processing and quality control.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC TS 62565-5-1:2023, Nanomanufacturing - Product specifications - Part 5-1: Nanoporous
activated carbon - Blank detail specification: Electrochemical capacitors
3 Terms and definitions, acronyms and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
electric double-layer capacitor
EDLC
device for electrostatic storage of electrical energy achieved by separation of charge in a double
layer
[SOURCE: ISO 18300:2016, 3.8]
3.1.2
coin cell
cell with a cylindrical shape in which the overall height is less than the diameter e.g. in the
shape of a button or a coin
Note 1 to entry: In practice, the term coin is used exclusively for non-aqueous lithium cells.
Note 2 to entry: Button cell is equivalent to coin cell.
[SOURCE: IEC 60050-482:2004, 482-02-40, modified – "button cell" has been moved to a
note 2 to entry.]
3.1.3
active material
material that can be used to store energy by electrochemical double-layer or pseudo
capacitance effect
Note 1 to entry: Typically, nonreactive carbon materials are electric double-layer capacitance active material,
including activated carbon, pure carbon nanotube and pure graphene.
Note 2 to entry: Typically, carbon composites and carbons embedded with heteroatoms are pseudo capacitance
active material.
[SOURCE: IEC TS 62565-5-2:2022, 3.3.1]
3.1.4
activated carbon
carbon, usually in the form of granules, treated to enhance its surface area and consequent
ability to adsorb and desorb the ions through a highly developed pore structure
Note 1 to entry: Activated charcoal is equivalent to activated carbon.
[SOURCE: IEC TS 62565-5-1:2023, 3.2.5, modified – "activated charcoal" has been moved to
a note 1 to entry.]
3.1.5
nanoporous activated carbon
activated carbon with nanopores
Note 1 to entry: The performance of such activated carbon application mainly depends on its nanoporous structure
[SOURCE: IEC TS 62565-5-1:2023, 3.2.6]
3.1.6
electrode
conductive part in electric contact with a medium of lower conductivity and intended to perform
one or more of the functions of emitting charge carriers to or receiving charge carriers from that
medium or to establish an electric field in that medium
[SOURCE: IEC 60050-151:2001, 151-13-01]
3.1.7
binder
resinous material which serves to bind the various component materials
3.1.8
current collector
conductive material in electrochemical capacitors that collects electron from the anode side or
conducts electrons to the cathode side
[SOURCE: IEC 60050-485:2020, 485-06-07, modified – "in a fuel cell" is modified for "in
electrochemical capacitors"]
3.1.9
carbonaceous coating aluminium foil
aluminium foil coated with carbon nanomaterial
3.1.10
etched aluminium foil
aluminium foil roughened by chemical or electrochemical methods
3.1.11
electrolyte
liquid or solid substance containing mobile ions which render it ionically conductive
Note 1 to entry: The electrolyte may be liquid, solid or a gel.
[SOURCE: IEC 60050-482:2004, 482-02-29]
3.1.12
separator
component of a cell, made up of material permeable for ions, which prevents electric contact
between cell plates of opposite polarity within a cell
[SOURCE: IEC 60050-482:2004, 482-02-11]
3.1.13
solid content
mass percentage of the remaining part of the slurry after drying under the specified conditions
3.1.14
surface density
at a given point on a two-dimensional domain of quasi-infinitesimal area dA, scalar quantity
equal to the mass dm within the domain divided by the area dA, thus ρ = dm/dA
A
[SOURCE: IEC 60050-113:2011, 113-03-10, modified – The note has been removed.]
3.1.15
thickness
shortest distance between two surfaces limiting a layer, when this distance can be considered
to be a constant over a region of a finite size
[SOURCE: IEC 60050-113:2011, 113-01-24]
3.2 Acronyms and abbreviated terms
AN Acetonitrile
CB Carbon black
CMC Sodium carboxymethyl cellulose
PC Propylene carbonate
PE Polyethylene
PP Polypropylene
PTFE Polytetrafluoroethylene
PVDF Polyvinylidene fluoride
SBP-BF Tetrafluoroborate spiro quaternary ammonium salt
SBR Butadiene styrene rubber
TEABF Tetraethylammonium tetrafluoroborate
4 General
4.1 Coin-cell EDLC preparation principle
The electrode materials are thoroughly mixed, coated onto a current collector, dried,
subsequently rolled and cut into electrode discs. The resulting electrode discs are assembled
into 20 mm-diameter, 3,2 mm-thickness coin-cell EDLCs, as shown in Annex C.
4.2 Description of measurement equipment/apparatus
The main laboratory apparatus and their corresponding requirements are as shown in Table 1:
Table 1 – Key measurement equipment/apparatus
No. Apparatus Name Function Requirements
Readability of 0,1 mg for
measuring the total mass of
Measuring the mass of
electrode discs and the mass of
1 Analytical balance electrode and electrode
electrode materials and 0,001 mg
materials
for measuring the mass of each
rolled electrode disc
Mixing the conductive paste Rotational speed of not less than
2 Mixing and dispersing machine
and electrode slurry 1 500 rpm
Coating the electrode slurry
onto the current collector with The scraper gap can adjust
3 Coater
known thickness and surface between (0,1 – 0,5) mm.
density
Drying the electrode laminate Maximum temperature is no less
4 Convection drying oven
to remove most of the solvent than 250 °C
Rolling the electrode laminate
5 Rolling press until the design thickness is Rolling gap range of (0 to 1,3) mm
reached
Cutting electrode discs and
Equipped with 10 mm, 12 mm,
6 Cutter separator discs with particular
14 mm and 19 mm cutting dies.
diameter
Vacuum level of no higher than
7 Vacuum oven Drying selected electrodes. 133 Pa and a maximum
temperature of no less than 150 °C
Pipette or electrolyte injection Injecting the electrolyte into the
8 Readability is 1 μL
system coin cell
Meas
...