GB/T 33827-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 33827-2017 | English | 145 |
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Determination of magnetic impurities in anode nanomaterials for Li-ion battery
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GB/T 33827-2017: Determination of magnetic impurities in anode nanomaterials for Li-ion battery---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT33827-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.060.50
G 12
Determination of magnetic impurities in
anode nanomaterials for Li-ion battery
Issued on. MAY 31, 2017
Implemented on. DECEMBER 1, 2017
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Determination principle... 5
5 Environmental conditions for determination... 5
6 Reagents and materials... 5
7 Testing instruments and equipment... 6
8 Testing procedures... 7
9 Result calculation and data processing... 9
10 Repeatability... 9
11 Test report... 10
Annex A (Informative) Rolling device schematic... 11
Annex B (Informative) Removal steps of magnetic bar and precautions... 12
Annex C (Informative) Instrument parameter setting... 14
Foreword
This Standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This Standard was proposed by Chinese Academy of Sciences.
This Standard shall be under the jurisdiction of Subcommittee on
Nanomaterials, National Technical Committee on Nanotechnology of
Standardization Administration of China (SAC/TC 279 / SC 1).
The drafting organizations of this Standard. Shenzhen Beitui New Energy
Materials Co., Ltd., Hefei Guoxuan Hi-Tech Power Energy Co., Ltd., Henan
Cologne New Energy Co., Ltd., Metallurgical Industry Information Standards
Institute, Shenzhen BRT Nanotechnology Limited, Tianjin BRT New Energy
Technology Co., Ltd.
Main drafters of this Standard. Yue Min, Mao Aiping, Ge Daobin, Cheng Di,
Dai Shifeng, Zha Xiufang, Chen Nanmin, Yang Xulai, Xu Yunjun, Huang
Youyuan, Liu Xiuming.
Determination of magnetic impurities in
anode nanomaterials for Li-ion battery
1 Scope
This Standard specifies the principle, environmental conditions for
determination, reagents and instruments, test procedures, analysis and
calculation of results, and test report content in determination of magnetic
materials in anode nanomaterials for Li-ion battery in inductively coupled
plasma atomic emission spectrometry (ICP-OES).
This Standard applies the determination of magnetic materials (the sum of
iron, cobalt, chromium, nickel, zinc content) with mass fraction between
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 terms and definitions apply.
3.1 magnetic materials
the general term for the metal material adsorbed by the magnetic bar under
the operation conditions specified in this Standard
4 Determination principle
Disperse the sample in an ethanol medium. Scroll the sample for a certain
time using a magnetic bar with a certain magnetic field strength. Heat the
adsorbed magnetic particles in an acid solution to elute.
5 Environmental conditions for determination
The determination shall be carried out at room temperature, with a humidity
not exceeding 60%RH.
6 Reagents and materials
Warning - Some of the reagents used in this test method are toxic or
corrosive and shall be handled with care!
6.1 General requirements
Unless otherwise specified, the analytical reagents and the grade three
water specified in GB/T 6682-2008 are used in the analysis.
6.2 Nitric acid
The mass fraction is not less than 65%.
6.3 Hydrochloric acid
The mass fraction is not less than 36%.
6.6 Standard materials
6.6.1 Iron standard solution, with standard number of GSB04-1726-2004,
with the concentration of 1000 μg/mL.
6.6.2 Cobalt standard solution, with standard number of GSB04-1722-2004,
with the concentration of 1000 μg/mL.
6.7 Preparation of standard solution
6.7.1 Respectively pipet 5.00 mL of iron, cobalt, chromium, nickel, zinc
standard solutions (6.6) into a 100.00 mL volumetric flask. Add into 2.00 mL of
nitric acid (6.2). Set volume for use. The concentration of iron, cobalt,
chromium, nickel, zinc in this standard solution shall be 50.00 μg/mL.
7 Testing instruments and equipment
7.1 Inductively coupled plasma atomic emission spectrometer
(ICP-OES)
7.4 Magnetic bar
magnetic field strength. 6000 GS (allowable deviation of less than 5%);
selected diameter. 15mm ~ 20mm, length. 45mm ~ 55mm; appearance.
7.5 Electronic balance
precision of 0.001 g
7.6 Rolling device
rolling diameter. 10cm ~ 12cm; the rotation speed can be set between 60
r/min ~ 100 r/min; refer to Annex A for the rolling method of the rolling
machine
7.7 Ultrasonic cleaning instrument
ultrasonic frequency. 28kHz ~ 33kHz
8 Testing procedures
8.1 Magnetic bar cleaning
Place the magnetic bar in a clean conical flask. Add into 2.00 mL of nitric acid,
6.00 mL of hydrochloric acid. Add water till it immerses the magnetic bar.
Place onto the heating device to heat.
8.2 Sample weighing
According to the requirements of Table 2, accurately weigh a certain amount
of sample into the clean sample can.
8.4 Cleaning
After rolling, take the magnetic bar out and put into the conical flask. See
Annex B for removing process. After cleaning with water, add into 50 mL of
anhydrous ethanol.
8.5 Digestion of magnetic materials
After cleaning, add into 1.5 mL of nitric acid, 4.5 mL of hydrochloric acid into
the conical flask equipped with the magnetic bar. Add into water to make the
magnetic bar totally immersed.
8.6 Preparation of blank sample
Carry out the blank test with the sample.
8.7 Determination
Using an inductively coupled plasma emission spectrometer. See Annex C for
parameter setting. According to Table 1, select the element wavelength. Test
the series of mixed standard solution in sequence.
9 Result calculation and data processing
The content of magnetic material shall be calculated according to equation (1),
equation (2).
10 Repeatability
10.1 This method does not have a suitable standard sample available for
the determination of the deviation, so the repeatability of the test shall be
used to determine its repeatability.
10.2 The same sample shall be tested in four laboratories. The sample
mean, standard deviation in the laboratory, inter-laboratories are shown in
Table 3.
11 Test report
The test report shall contain but is not limited to the following information.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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