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A method for testing zirconia in zirconia-coated nickel-cobalt-manganese ternary cathode material

A technology of positive electrode material and testing method, which is applied in the field of testing zirconia in zirconia-coated nickel-cobalt-manganese ternary positive electrode material, and can solve the problems of large errors and many interference factors.

Active Publication Date: 2022-03-11
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Problems solved by technology

[0005] A method for testing zirconia in zirconia-coated nickel-cobalt-manganese ternary positive electrode materials proposed by the present invention can solve the technical problems of many interference factors and large errors in existing methods

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  • A method for testing zirconia in zirconia-coated nickel-cobalt-manganese ternary cathode material
  • A method for testing zirconia in zirconia-coated nickel-cobalt-manganese ternary cathode material
  • A method for testing zirconia in zirconia-coated nickel-cobalt-manganese ternary cathode material

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Embodiment 1

[0026] The specific experimental test steps of the embodiment of the present invention are as follows:

[0027] 1.1 Instruments and equipment

[0028] AAS-900 atomic absorption spectrometer (Platinum Elmer, USA), adjustable electric heating plate, UPR-10T ultra-pure water machine (Xi'an Youpu), zirconium hollow cathode lamp (Beijing Nonferrous Research Institute), 1 / 10,000 electronic balance ( Mettler Toledo).

[0029] 1.2 Reagents and solutions

[0030] (1) Nitric acid, superior grade pure (68-70%) Sinopharm Chemical Reagent (Shanghai);

[0031] (2) Hydrofluoric acid, superior grade pure, Aladdin chemical reagent;

[0032] (3) Zirconium standard solution: 1000ug / ml, Beijing Nonferrous Research Institute;

[0033] (4) n-hexane, chromatographically pure, Sinopharm Chemical Reagent (Shanghai);

[0034] (5) strontium chloride, superior grade pure, Aladdin chemical reagent;

[0035] (6) Deionized water, resistivity ≥ 18 megohm.cm;

[0036] (7) Chromatographically pure trime...

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Abstract

The invention provides a method for testing zirconia in zirconia-coated nickel-cobalt-manganese ternary positive electrode materials, which can solve the technical problems of many interference factors and large errors in the existing method. The present invention uses hydrofluoric acid and nitric acid to dissolve the nickel-cobalt-manganese ternary positive electrode material sample, heats and dissolves on the electric heating plate, then adds cesium chloride to the sample solution, and transfers the sample solution at constant volume to a separatory funnel to add The n-hexane solution containing 55% trimethyl phosphate is extracted and separated, and the separated organic phase solution is used as the sample to be tested; the present invention selects 1.5% cesium chloride solution to suppress zirconium under the high temperature of nitrous oxide-acetylene flame Ionization improves the test sensitivity of zirconium. Using n-hexane solution containing 55% trimethyl phosphate to extract, according to the different binding abilities of various metals and extractants, separate the main metal and zirconium metal ions, and change the type of anion, thereby reducing the nickel-cobalt-manganese ternary positive electrode material. The main metal of nickel, cobalt and manganese interferes with the test of zirconium metal, improving the test accuracy.

Description

technical field [0001] The invention relates to the technical field of battery material detection, in particular to a method for testing zirconia in zirconia-coated nickel-cobalt-manganese ternary positive electrode materials. Background technique [0002] Lithium-ion batteries are widely used due to their advantages of high energy density, high voltage and long cycle life, and the commercialization of the automobile industry requires further improvement of energy density and safety, nickel-cobalt-manganese ternary positive electrode The material LiNi1 / 3Co1 / 3Mn1 / 3O2 is widely used in the cathode material of automobile power battery because of its high specific energy, low cost, stable cycle performance, low toxicity and good safety. However, the above-mentioned systems all have the problem of low electrical conductivity, which restricts the improvement of their electrochemical performance. Therefore, different modification methods (coating, element doping, etc.) are require...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N21/31
CPCG01N1/28G01N21/3103
Inventor 李涛
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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