Method for testing zirconium oxide in zirconium oxide coated nickel-cobalt-manganese ternary positive electrode material

A cathode material and testing method technology, which is applied in the field of zirconia testing in zirconia-coated nickel-cobalt-manganese ternary cathode materials, can solve the problems of large errors and many interference factors, and achieve high accuracy and less spectral line interference , the effect of increasing the flame temperature

Active Publication Date: 2020-07-14
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 prop...

Method used

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  • Method for testing zirconium oxide in zirconium oxide coated nickel-cobalt-manganese ternary positive electrode material
  • Method for testing zirconium oxide in zirconium oxide coated nickel-cobalt-manganese ternary positive electrode material
  • Method for testing zirconium oxide in zirconium oxide coated nickel-cobalt-manganese ternary positive electrode 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 discloses a method for testing zirconium oxide in a zirconium oxide coated nickel-cobalt-manganese ternary positive electrode material, and can solve the technical problems of more interference factors and larger errors in the existing method. The method comprises the following steps: dissolving a nickel-cobalt-manganese ternary positive electrode material sample by hydrofluoric acidand nitric acid; adding cesium chloride into the sample solution, transferring the constant volume sample solution into a separating funnel, adding an n-hexane solution containing 55% of trimethyl phosphate for extraction separation, and taking the separated organic phase solution as a to-be-detected sample. According to the invention, the 1.5% cesium chloride solution is selected to inhibit ionization of zirconium at high temperature of nitrous oxide-acetylene flame, and the test sensitivity of zirconium is improved. A normal hexane solution containing 55% of trimethylphosphate is used for extraction, main metal and zirconium metal ions are separated according to different combining capacities of various metals and an extracting agent, and the types of anions are changed, so the interference of the nickel-cobalt-manganese main metal in the nickel-cobalt-manganese ternary positive electrode material on zirconium metal testing is reduced, and the testing accuracy is improved.

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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IPC IPC(8): G01N1/28G01N21/31
CPCG01N1/28G01N21/3103
Inventor 李涛
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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