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Method for analyzing content of main elements in nickel cobalt lithium manganate positive electrode material

A technology of nickel cobalt lithium manganese oxide and analysis method, which is applied in the direction of material analysis, material analysis, and measuring device using wave/particle radiation, which can solve the problem of not fully satisfying fast-paced production, large consumption of chemical reagents, and inability to reproduce samples. Utilize and other problems to achieve the effect of great practicability, short detection cycle, and reduce the number of times of exposure to dangerous sources

Pending Publication Date: 2021-08-27
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Both of the above two documents use the conventional ICP element determination method, which inevitably involves the pretreatment of the sample, the detection process is cumbersome, the analysis speed is slow, the analysis cycle is long, and more manpower is required, and chemical reagents are required. Large consumption, high cost of testing, coupled with a large amount of chemical waste liquid caused environmental pollution, and the tested samples cannot be reused, which can no longer fully meet the needs of fast-paced production

Method used

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  • Method for analyzing content of main elements in nickel cobalt lithium manganate positive electrode material
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  • Method for analyzing content of main elements in nickel cobalt lithium manganate positive electrode material

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Embodiment 1

[0064] The present embodiment provides a method for establishing a standard curve in the nickel-cobalt lithium manganese oxide positive electrode material, and its establishment method is carried out based on the above-mentioned specific examples:

[0065] Among them, the chemical formula of the standard sample is LiNi 0.5 co 0.2 mn 0.3 o 2 , the main elements in the standard sample are Ni, Co and Mn, the pressure is 40t, the tablet processing time is 80s, the phototube voltage is 40KV, the phototube current is 900μA, and the test time is 70s.

Embodiment 2

[0067] The present embodiment provides a method for establishing a standard curve in the nickel-cobalt lithium manganese oxide positive electrode material, and its establishment method is carried out based on the above-mentioned specific examples:

[0068] Among them, the chemical formula of the standard sample is LiNi 0.6 co 0.1 mn 0.3 o 2, the main elements in the standard sample are Ni, Co and Mn, the pressure is 30t, the tablet processing time is 100s, the phototube voltage is 30KV, the phototube current is 850μA, and the test time is 80s.

Embodiment 3

[0070] The present embodiment provides a method for establishing a standard curve in the nickel-cobalt lithium manganese oxide positive electrode material, and its establishment method is carried out based on the above-mentioned specific examples:

[0071] Among them, the chemical formula of the standard sample is LiNi 0.8 co 0.1 mn 0.1 o 2 , the main elements in the standard sample are Ni, Co and Mn, the pressure is 35t, the tablet processing time is 90s, the phototube voltage is 45KV, the phototube current is 1000μA, and the test time is 55s.

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Abstract

The invention provides a method for analyzing the content of main elements in a nickel cobalt lithium manganate positive electrode material. The analyzing method comprises the following steps: (1) carrying out tabletting treatment on a standard sample, then testing the tableted sample by adopting an X-ray fluorescence spectrometer, selecting a model calibration curve spectrogram, preprocessing the curve spectrogram, and establishing a corresponding standard curve; and (2) carrying out tabletting treatment on a to-be-detected sample, then testing the tableted sample by adopting the X-ray fluorescence spectrometer, and obtaining the content of the main elements in the to-be-detected sample according to the corresponding standard curve in the step (1). According to the method, the X-ray fluorescence spectrophotometer is adopted to analyze multiple elements such as Ni, Co and Mn in NCM at a time, and the method is easy to operate, high in analysis speed, safe, rapid, low in cost, high in accuracy, good in stability, high in detection efficiency, high in practicability and suitable for actual production.

Description

technical field [0001] The invention belongs to the technical field of chemical element composition analysis in lithium ion batteries, and relates to the technical field of a method for analyzing the content of main elements in nickel-cobalt lithium manganese oxide cathode materials. Background technique [0002] Lithium-ion battery ternary cathode material nickel cobalt manganese oxide (NCM) has the advantages of high specific capacity, wide discharge voltage range, stable electrochemical performance, good safety performance, etc., and has broad market prospects. NCM incorporates LiCoO 2 , LiNiO 2 , LiMnO 2 The characteristics of the three have obvious synergistic effects. The main elements of NCM are Ni, Co, and Mn. Adding Co can reduce the occurrence of cation mixing and effectively stabilize the structure of the material; adding Ni can increase the capacity of the material; adding Mn can reduce the cost of the material and improve the stability of the material sex an...

Claims

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Application Information

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IPC IPC(8): G01N23/223G01N23/2202
CPCG01N23/223G01N23/2202G01N2223/076
Inventor 张敏梁鲁西耿帅
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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