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GB/T 41704-2022   Test methods of cathode materials for lithium ion battery—Determination of magnetic impurities content and residual alkali content (English Version)
Standard No.: GB/T 41704-2022 Status:valid remind me the status change

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Word Count: 7500 words Price(USD):225.0 remind me the price change

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Implemented on:2023-2-1 Delivery: via email in 1 business day
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Standard No.: GB/T 41704-2022
English Name: Test methods of cathode materials for lithium ion battery—Determination of magnetic impurities content and residual alkali content
Chinese Name: 锂离子电池正极材料检测方法 磁性异物含量和残余碱含量的测定
Chinese Classification: H16    Powder metallurgy analysis method
Professional Classification: GB    National Standard
Issued by: SAMR; SAC
Issued on: 2022-10-12
Implemented on: 2023-2-1
Status: valid
Language: English
File Format: PDF
Word Count: 7500 words
Price(USD): 225.0
Delivery: via email in 1 business day
1 Scope This document specifies the determination method of magnetic impurities content and residual alkali content in cathode materials for lithium ion battery. This document is applicable to the determination of magnetic impurities content and residual alkali content in cathode materials for lithium ion battery. The determination range of magnetic impurities content is ≥1μg/kg, and that of residual alkali content (mass fraction) is 0.001%~2.500%. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 601 Chemical reagent - Preparations of reference titration solutions GB/T 6682 Water for analytical laboratory use - Specification and test methods GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 magnetic impurities impurities in cathode materials for lithium ion battery that can be adsorbed by magnetic rods with magnetic induction intensity of not less than 0.5T (5,000 Gauss) Note: Magnetic impurities usually refer to elementary substances or compounds of iron, chromium, nickel and zinc. 3.2 large particle magnetic impurities magnetic impurities with a diameter of not less than 10μm under the scanning electron microscope 3.3 residual alkali alkaline substance attached to the surface of cathode materials for lithium ion battery Note: The residual alkali mainly exists in the form of lithium hydroxide and lithium carbonate. The residual alkali is expressed by lithium carbonate content after test, and the residual lithium is expressed by lithium content. 4 Determination of magnetic impurities content 4.1 Inductively coupled plasma atomic emission spectrometry 4.1.1 Principle In a clean environment without magnetic impurities, a magnetic rod is used to adsorb and gather the magnetic impurities in cathode materials. The magnetic rod is washed with water to remove the cathode material attached to the surface, and the magnetic impurities are dissolved with acid solution. The emission intensity of each element is determined at the recommended wavelength by inductively coupled plasma atomic emission spectrometer, and then the mass fraction of each element is calculated according to the standard working curve. 4.1.2 Reagents or materials Unless otherwise specified, guaranteed reagents and Grade 1 water specified in GB/T 6682 are adopted for the purpose of this method. 4.1.2.1 Nitric acid (ρ=1.42g/mL). 4.1.2.2 Aqua regia (). 4.1.2.3 Iron standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.4 Chromium standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.5 Nickel standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.6 Zinc standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.7 Lithium standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.8 Mixed standard solution A: respectively pipette 10.00mL iron standard stock solution (4.1.2.3), chromium standard stock solution (4.1.2.4), nickel standard stock solution (4.1.2.5) and zinc standard stock solution (4.1.2.6) into a 100mL volumetric flask, add 3mL nitric acid (4.1.2.1), dilute it to the scale with water, mix well and immediately transfer into a dry plastic bottle. This solution has a content of iron, chromium, nickel and zinc of 10μg/mL respectively. 4.1.2.9 Mixed standard solution B: pipette 20.00mL mixed standard solution A (4.1.2.8) into a 100mL volumetric flask, add 3mL nitric acid (4.1.2.1), dilute it to the scale with water, mix well and immediately transfer into a dry plastic bottle. This solution has a content of iron, chromium, nickel and zinc of 2μg/mL respectively. 4.1.2.10 Lithium standard solution A: pipette 10.00mL lithium standard stock solution (4.1.2.7) into a 100mL volumetric flask, add 3mL nitric acid (4.1.2.1), dilute it to the scale with water, mix well and immediately transfer into a dry plastic bottle. This solution has a content of lithium of 10μg/mL. 4.1.2.11 Lithium standard solution B: pipette 20.00mL lithium standard solution A (4.1.2.10) into a 100mL volumetric flask, add 3mL nitric acid (4.1.2.1), dilute it to the scale with water, mix well and immediately transfer into a dry plastic bottle. This solution has a content of lithium of 2μg/mL. 4.1.3 Instruments and apparatus 4.1.3.1 De-ironing rod: with magnetic induction intensity of not less than 0.5T (5,000 Gauss), covered with plastic wrap. 4.1.3.2 Wide-mouth plastic bottle: 500mL. 4.1.3.3 Magnetic rod: with magnetic induction intensity of not less than 0.5T (5,000 Gauss), a size of 17mm×52mm, sealed with PTFE jacket. 4.1.3.4 Magnet: covered with plastic wrap. 4.1.3.5 Ball mill.
Foreword i Introduction ii 1 Scope 2 Normative references 3 Terms and definitions 4 Determination of magnetic impurities content 5 Determination of residual alkali content 6 Test report
Referred in GB/T 41704-2022:
*GB/T 601-2016 Chemical Reagent - Preparations of Standard Volumetric Solutions
*GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
*GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values
Code of China
Standard
GB/T 41704-2022  Test methods of cathode materials for lithium ion battery—Determination of magnetic impurities content and residual alkali content (English Version)
Standard No.GB/T 41704-2022
Statusvalid
LanguageEnglish
File FormatPDF
Word Count7500 words
Price(USD)225.0
Implemented on2023-2-1
Deliveryvia email in 1 business day
Detail of GB/T 41704-2022
Standard No.
GB/T 41704-2022
English Name
Test methods of cathode materials for lithium ion battery—Determination of magnetic impurities content and residual alkali content
Chinese Name
锂离子电池正极材料检测方法 磁性异物含量和残余碱含量的测定
Chinese Classification
H16
Professional Classification
GB
ICS Classification
Issued by
SAMR; SAC
Issued on
2022-10-12
Implemented on
2023-2-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
7500 words
Price(USD)
225.0
Keywords
GB/T 41704-2022, GB 41704-2022, GBT 41704-2022, GB/T41704-2022, GB/T 41704, GB/T41704, GB41704-2022, GB 41704, GB41704, GBT41704-2022, GBT 41704, GBT41704
Introduction of GB/T 41704-2022
1 Scope This document specifies the determination method of magnetic impurities content and residual alkali content in cathode materials for lithium ion battery. This document is applicable to the determination of magnetic impurities content and residual alkali content in cathode materials for lithium ion battery. The determination range of magnetic impurities content is ≥1μg/kg, and that of residual alkali content (mass fraction) is 0.001%~2.500%. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 601 Chemical reagent - Preparations of reference titration solutions GB/T 6682 Water for analytical laboratory use - Specification and test methods GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 magnetic impurities impurities in cathode materials for lithium ion battery that can be adsorbed by magnetic rods with magnetic induction intensity of not less than 0.5T (5,000 Gauss) Note: Magnetic impurities usually refer to elementary substances or compounds of iron, chromium, nickel and zinc. 3.2 large particle magnetic impurities magnetic impurities with a diameter of not less than 10μm under the scanning electron microscope 3.3 residual alkali alkaline substance attached to the surface of cathode materials for lithium ion battery Note: The residual alkali mainly exists in the form of lithium hydroxide and lithium carbonate. The residual alkali is expressed by lithium carbonate content after test, and the residual lithium is expressed by lithium content. 4 Determination of magnetic impurities content 4.1 Inductively coupled plasma atomic emission spectrometry 4.1.1 Principle In a clean environment without magnetic impurities, a magnetic rod is used to adsorb and gather the magnetic impurities in cathode materials. The magnetic rod is washed with water to remove the cathode material attached to the surface, and the magnetic impurities are dissolved with acid solution. The emission intensity of each element is determined at the recommended wavelength by inductively coupled plasma atomic emission spectrometer, and then the mass fraction of each element is calculated according to the standard working curve. 4.1.2 Reagents or materials Unless otherwise specified, guaranteed reagents and Grade 1 water specified in GB/T 6682 are adopted for the purpose of this method. 4.1.2.1 Nitric acid (ρ=1.42g/mL). 4.1.2.2 Aqua regia (). 4.1.2.3 Iron standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.4 Chromium standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.5 Nickel standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.6 Zinc standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.7 Lithium standard stock solution (100μg/mL), prepared from high purity metals or compounds, or using certified single element standard stock solution. 4.1.2.8 Mixed standard solution A: respectively pipette 10.00mL iron standard stock solution (4.1.2.3), chromium standard stock solution (4.1.2.4), nickel standard stock solution (4.1.2.5) and zinc standard stock solution (4.1.2.6) into a 100mL volumetric flask, add 3mL nitric acid (4.1.2.1), dilute it to the scale with water, mix well and immediately transfer into a dry plastic bottle. This solution has a content of iron, chromium, nickel and zinc of 10μg/mL respectively. 4.1.2.9 Mixed standard solution B: pipette 20.00mL mixed standard solution A (4.1.2.8) into a 100mL volumetric flask, add 3mL nitric acid (4.1.2.1), dilute it to the scale with water, mix well and immediately transfer into a dry plastic bottle. This solution has a content of iron, chromium, nickel and zinc of 2μg/mL respectively. 4.1.2.10 Lithium standard solution A: pipette 10.00mL lithium standard stock solution (4.1.2.7) into a 100mL volumetric flask, add 3mL nitric acid (4.1.2.1), dilute it to the scale with water, mix well and immediately transfer into a dry plastic bottle. This solution has a content of lithium of 10μg/mL. 4.1.2.11 Lithium standard solution B: pipette 20.00mL lithium standard solution A (4.1.2.10) into a 100mL volumetric flask, add 3mL nitric acid (4.1.2.1), dilute it to the scale with water, mix well and immediately transfer into a dry plastic bottle. This solution has a content of lithium of 2μg/mL. 4.1.3 Instruments and apparatus 4.1.3.1 De-ironing rod: with magnetic induction intensity of not less than 0.5T (5,000 Gauss), covered with plastic wrap. 4.1.3.2 Wide-mouth plastic bottle: 500mL. 4.1.3.3 Magnetic rod: with magnetic induction intensity of not less than 0.5T (5,000 Gauss), a size of 17mm×52mm, sealed with PTFE jacket. 4.1.3.4 Magnet: covered with plastic wrap. 4.1.3.5 Ball mill.
Contents of GB/T 41704-2022
Foreword i Introduction ii 1 Scope 2 Normative references 3 Terms and definitions 4 Determination of magnetic impurities content 5 Determination of residual alkali content 6 Test report
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Keywords:
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