GB/T 41232.3-2023Nanomanufacturing - Key control characteristics - Nano-enabled electrical energy storage - Part 3: Contact and coating resistivity measurements for nanomaterials (English PDF)

Foreword

This document was issued on 23 May 2023 by the State Administration for Market Regulation; Standardization Administration of the PRC and takes effect on 1 December 2023.

It is a GB/T standard: recommended rather than compulsory, but it is the text a Chinese reviewer applies when assessing a submission.

It is classified under ICS 07.030, Chinese classification F19.

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1. Structure and Drafting Rules for Standardization Documents"

drafting.

This document is the third part of GB/T 41232 "Nano-manufacturing key control characteristics nano-energy storage". GB/T 41232 has issued

Published the following sections.

--- Part 2. Density test of nano-cathode materials;

--- Part 3. Testing of nanomaterial contact resistivity and coating resistivity.

This document is equivalent to IEC /T S62607-4-3.2015 "Key Control Characteristics of Nanomanufacturing Part 4-3. Nanoscale Energy Storage Devices"

Nanomaterial Contact and Coating Resistivity Test", the file type was adjusted from the IEC technical specification to the national standard of our country.

The following minimal editorial changes have been made to this document.

--- In order to coordinate with existing standards, the name of the standard is changed to "Nano-manufacturing key control characteristics Nano energy storage Part 3. Nano

Test of Material Contact Resistivity and Coating Resistivity";

---Change "LiNi1/3Co1/3Mn1/3O2" to "LiNixCoyMn1-x-yO2" (see 3.2);

--- Correct "(650+/-5)mm" to "(650+/-5)um" (see 4.2.2);

--- Correct "9mm~40mm" to "9um~40um" (see 4.2.3);

--- Correct "10mm~20mm" to "10um~20um" (see 4.2.3).

Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.

This document was proposed by the Chinese Academy of Sciences.

This document is under the jurisdiction of the National Nanotechnology Standardization Technical Committee (SAC/TC279).

This document was drafted by. Shenzhen Institute of Standards and Technology, Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, National Nanoscience Center,

Shenzhen Defang Nano Technology Co., Ltd., Xiamen Gartley Technology Co., Ltd., Zaozhuang Standard Metrology Research Center, Shandong Tianhanxin

Energy Technology Co., Ltd., Shenzhen Quality Standard Technology Co., Ltd., Shenzhen Shangou New Material Co., Ltd., the Belt and Road Environmental Technology Exchange and Transfer

Shift Center (Shenzhen), Shandong Zhongke Lantian Technology Co., Ltd.

The main drafters of this document. Fan Yangbo, Wang Yiqun, Jia Yongpeng, Ge Guanglu, Huang Xianhong, Wang Yuanhang, Sun Yan, Chen Guofen, Yan Jingyun, Zheng Haifeng,

Chen Fanwei, Qiu Zhiping, Guo Xiaoqian, Li Xiaoming, Ke Ruilin, Yi Lisa, Wang Wei.

Introduction

Compared with general materials, nano-energy storage materials have shown superior performance. In order to accelerate the healthy development of nano-energy storage, an emerging industry,

Standardizing the performance testing methods of nano-energy storage materials has become an urgent task in the industry. In this regard, the International Electrotechnical Commission Electrotechnical Products and

The System Nanotechnology Committee (IEC /TC113) has released eight standardized documents on performance testing of nano energy storage materials.

According to the needs of domestic industry development, it is planned to adopt relevant standards. GB/T 41232 "Nano-manufacturing key control characteristics nano-energy storage" is the guide

The method standard for testing the physical and chemical properties of nano energy storage materials is proposed to be composed of eight parts.

--- Part 1. Electrochemical performance test of nano-cathode materials two-electrode battery method. The purpose is to establish the use of two-electrode batteries

Relevant regulations for testing the electrochemical performance of nanoscale cathode materials.

--- Part 2. Density test of nano cathode materials. The purpose is to establish relevant regulations for testing the density of nanoscale cathode materials.

--- Part 3. Testing of nanomaterial contact resistivity and coating resistivity. The purpose is to establish the measurement of nano-electrode material contact

Relevant regulations on resistivity and coating resistivity.

--- Part 4. Needle punching method for thermal performance testing of nanomaterials. The purpose is to establish a method for testing the thermal properties of nano energy storage devices by acupuncture method.

Regulations on the level of out-of-control.

--- Part 5. Electrochemical performance test of nano-cathode materials three-electrode battery method. The purpose is to establish the use of three-electrode batteries

Relevant regulations for testing the electrochemical performance of nanoscale cathode materials.

--- Part 6. Determination of carbon content in nanometer electrode materials Infrared absorption method. The purpose is to establish the infrared spectroscopic absorption method

Relevant regulations for determining the carbon content of nano-electrode materials.

--- Part 7. Determination of magnetic impurities in nano-cathode materials ICP-OES method. The purpose is to establish the use of inductively coupled plasma

Relevant regulations for the determination of magnetic impurities in nanoscale cathode materials by daughter emission spectrometer (ICP-OES).

--- Part 8. Determination of moisture content in nano-electrode materials Karl Fischer method. The purpose is to establish the adoption of Karl Fischer

Relevant regulations for the determination of moisture content in nano-electrode materials by coulometric titration.

The use of future renewable energy technologies, such as electric vehicles, will mainly rely on efficient energy storage systems. Current lithium-ion batteries, super

Supercapacitors and their derivative concept systems are considered to be the most promising options for innovation.

High energy density and long cycle life are two very important characteristics of electrode materials. Since many electrochemically active materials, such as gold

Metal oxides have low electron transport and insufficient electrical conductivity, so composites containing carbon nanomaterials are used to optimize the current flow in battery electrodes.

The movement of electrons in the composite will affect the electrochemical reaction and energy density of the battery. In addition, the contact between the electrode material and the metal current collector

Electronic contact resistivity is of great significance for achieving low ohmic internal resistance of batteries or capacitors.

This document provides a method for measuring the coating resistivity and contact resistivity of nanometer electrode materials, which is used to evaluate the carbon-containing coating.

Whether the combination of the composite material composition and the preparation process of the nano-layer nano energy storage electrode is optimal. This method can be used between different research groups

Comparison of results.

This document is mainly used for the comparison of contact resistivity and coating resistivity of carbon-containing nanocomposites in the research stage, not for the final product

Evaluation of middle electrodes.

This method is suitable for nano energy storage materials that can only show certain functions and performances by applying nanotechnology.

Addition to active materials can quantify or significantly increase the current flow of electrodes in electrical energy storage devices. Since small amounts of nanomaterials are often sufficient to significantly improve

High material performance, so the percentage of nanomaterials in the device discussed in this document is not directly related to the application of this document.

The nanomaterial content of electrodes, electrode coatings, separators or electrolytes is not relevant for the use of this method.

Nanofabrication key control features nanoscale energy storage

Part 3. Nanomaterial Contact Resistivity and Coatings

Resistivity Test

1 Scope

GB/T 41232.3-2023 is the third part of the GB/T 41232 series on key control characteristics in nanomanufacturing, and it covers the measurement of two quantities in nanostructured electrode materials for energy storage: the contact resistivity at the boundary between a coating and what it is coated on, and the resistivity through the coating itself. Both sit between an electrode's chemistry and the current a cell can actually deliver, which is why they are treated as control characteristics rather than as laboratory curiosities. Terms are taken from ISO/TS 80004-1 and extended in clause 3, which also carries the abbreviations. Clause 4 sets out how the specimen is prepared, clause 5 the electrical performance test, and clause 6 the analysis of the resulting data; the informative Appendix A works an example through. The document gives its own purpose as judging whether a coated composite is fit for use and as choosing between combinations of coated composite and preparation technique, which makes it a selection tool and not only a measurement one. The introduction places the work alongside eight testing documents issued by IEC/TC113 for nano-enabled energy storage. For developers of battery and supercapacitor materials, electrode coating lines, and the laboratories that qualify them.

This document describes a method for testing the contact resistivity and coating resistivity of nanoelectrode materials.

This document is intended for use in evaluating the utility of coated composites and in selecting combinations of coated composites and preparation techniques suitable for their application

Way.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

this document.

ISO /T S80004-1 Nanotechnology terms Part 1. Core terms (Nanotechnologies-Vocabulary-

Part 1.Coreterms)

Note. GB/T 30544.1-2014 Nanotechnology Terminology Part 1. Core Terms (ISO /T S80004-1.2010, IDT)

3 Terms, Definitions and Abbreviations

3.1 Terms and Definitions

The terms and definitions defined in ISO /T S80004-1 and the following apply to this document.

3.1.1

Contains a part of the material used for nano-energy storage devices with nano-functions or properties, such as those in lithium-ion batteries or supercapacitors

Material.

Note. The electrodes applied to lithium-ion batteries or supercapacitors are composed of solvents and

A binder is used to form a coating slurry. These slurries are applied to thin metal current collectors by a doctor blade coating process, dried and calendered to form the ultimate

after the electrode. The electrodes exhibit a multilayer structure consisting of an aluminum or copper current collector and a coating of electrode material. The electrode material coating contains the active phase [positive electrode - containing

Mixed oxides or phosphates of lithium, such as lithium cobalt oxide (LCO), lithium nickel cobalt aluminate (NCA), nickel cobalt aluminum manganate (NCM) and lithium iron phosphate (LFP), negative electrodes such as

Graphite and supercapacity activated carbon], conductive phase (such as carbon black, carbon nanotubes or carbon fibers and other carbon nanomaterials) and organic binders [such as polyvinylidene fluoride

(PVDF) or styrene-butadiene rubber (SBR)].

3.1.2

Coating resistivity coatingresistivity

The resistance of current flow through the electrode material coating.

Note 1. Coating resistivity is also expressed as resistivity.

NOTE 2. The electrode material coating resistivity depends on several factors such as raw material, coating process and final electrode preparation technique. The carbon content of nanomaterials is different,

The resistivity can be strongly affected by the preparation process and by the density or porosity of the coating. Resistivity can be assessed by preparing a thin coating of electrode material on an insulating substrate.

Coating resistivity was tested by four-probe method. Appendix A shows an example of sample design on a 5cm2 ceramic substrate.