GB/T 33827-2017 in English

《GB/T 33827-2017锂电池用纳米负极材料中磁性物质含量的测定方法》由TC279（全国纳米技术标准化技术委员会）归口，TC279SC1（全国纳米技术标准化技术委员会纳米材料分会）执行，主管部门为中国科学院。

Foreword

ChinaStandards.net is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.

This standard is developed in accordance with the rules given in GB/T 1.1-2009.

This national standard was proposed by Chinese Academy of Sciences

This standard is under the jurisdiction of the Subcommittee on Nanomaterials of the National Technical Committee on Nanotechnology of Standardization Administration of China (SAC/TC 279/SC 1).


Determination of magnetic impurities in anode nanomaterials for Li-ion battery

1 Scope

This standard specifies the principle, determination environment conditions, reagents and instruments, test procedures, result analysis and calculation, and test report for determination of magnetic materials in anode nanomaterials for Li-ion battery by inductively coupled plasma optical emission spectrometry (ICP-OES).

This standard is applicable to the determination of magnetic materials (the total content of iron, cobalt, chromium, nickel and zinc) with content (mass fraction) of 0.02×10-6~20×10-6.

2 Normative references

The following referenced documents are indispensable for the application 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.

GB/T 4842 Argon
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods

3 Terms and definitions

For the purposes of this document, the following term and definition apply.

3.1
magnetic materials
general term for metal substances adsorbed by a magnetic rod under the operating conditions specified in this standard

Note: The particles adsorbed by a magnetic rod from anode nanomaterials for Li-ion battery generally contain elementary substances or compounds of five elements, i.e., iron, cobalt, chromium, nickel and zinc.

4 Determination principle

The sample is dispersed in ethanol, and a magnetic rod with certain magnetic field intensity is used to roll and adsorb the sample for a certain time, then the adsorbed magnetic particles are heated in acid solution to dissolve out. The contents of iron, cobalt, chromium, nickel and zinc are determined by an inductively coupled plasma optical emission spectrometer, and the total content of these five elements is calculated.

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Determination principle
5 Determination environment conditions
6 Reagents and materials
7 Test instruments and apparatus
8 Test procedures
9 Result calculation and data processing
10 Repeatability
11 Test report
Annex A (Informative) Schematic diagram of rolling device
Annex B (Informative) Steps and precautions for taking magnetic rod out
Annex C (Informative) Setting of instrument parameters