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Evaluation method and application of nickel-containing material gram capacity

An evaluation method and a technology of gram capacity, applied in the direction of color/spectral characteristic measurement, etc., can solve problems such as low efficiency, and achieve the effect of simple experimental steps, cheap and easy-to-operate instruments, and easy to master

Active Publication Date: 2020-09-11
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a method for evaluating the gram capacity of nickel-containing materials, so as to alleviate the technical problem of low efficiency in the process of measuring the gram capacity of nickel-containing materials with the half-cell method in the prior art

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  • Evaluation method and application of nickel-containing material gram capacity
  • Evaluation method and application of nickel-containing material gram capacity

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Experimental program
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Effect test

Embodiment 1

[0059] Use the evaluation method provided by the present invention to measure the photometric values ​​of samples A to E respectively, and compare them with the actual gram capacities of samples A to E. Concretely, the method for testing absorbance comprises the following steps:

[0060] S1) Add 99 grams of ethanol and 1 gram of dimethylglyoxime to a 250 ml conical flask, shake the conical flask until dimethylglyoxime is completely dissolved to obtain a reaction solution;

[0061] S2) Add 15 grams of the above-mentioned reaction solution to five 25 ml stoppered glass test tubes respectively, and then add 0.75 grams of samples A to E respectively, seal the seal with a glass stopper, and vibrate for 10 minutes in an ultrasonic wave with a power of 300W. Stand on the test tube rack for 12 hours;

[0062] S3) After standing still, the powder precipitates at the bottom of the test tube, and the upper part is a colored liquid. Use a dropper to take the upper liquid of each test tub...

Embodiment 2

[0066] Use the evaluation method provided by the present invention to measure the photometric values ​​of samples A to E respectively, and compare them with the actual gram capacities of samples A to E. Concretely, the method for testing absorbance comprises the following steps:

[0067] S1) Add 99.5 grams of ethanol and 0.5 gram of dimethylglyoxime to a 250 ml Erlenmeyer flask, and shake the conical flask until the dimethylglyoxime is completely dissolved to obtain a reaction solution;

[0068] S2) Add 15 grams of the above-mentioned reaction solution to five 25 ml stoppered glass test tubes respectively, and then add 0.75 grams of samples A to E respectively, seal the seal with a glass stopper, and vibrate for 10 minutes in an ultrasonic wave with a power of 300W. Stand on the test tube rack for 12 hours;

[0069] S3) After standing still, the powder precipitates at the bottom of the test tube, and the upper part is a colored liquid. Use a dropper to take the upper liquid o...

Embodiment 3

[0074] Use the evaluation method provided by the present invention to measure the photometric values ​​of samples A to E respectively, and compare them with the actual gram capacities of samples A to E. Concretely, the method for testing absorbance comprises the following steps:

[0075] S1) Add 99.5 grams of ethanol and 0.5 gram of dimethylglyoxime to a 250 ml Erlenmeyer flask, and shake the conical flask until the dimethylglyoxime is completely dissolved to obtain a reaction solution;

[0076] S2) Add 15 grams of the above-mentioned reaction solution to five 25 ml stoppered glass test tubes respectively, and then add 0.75 grams of samples A to E respectively, seal the seal with a glass stopper, and vibrate for 10 minutes in an ultrasonic wave with a power of 300W. Stand on the test tube rack for 24 hours;

[0077] S3) After standing still, the powder precipitates at the bottom of the test tube, and the upper part is a colored liquid. Use a dropper to take the upper liquid o...

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Abstract

The invention provides a method for evaluating the gram capacity of nickel-containing materials and an application thereof, and relates to the field of battery materials. The method for evaluating thegram capacity of nickel-containing materials comprises the steps of S1) providing a reaction solution prepared by taking a compound consisting of at least two oximidos as a solute, wherein the at least two oximidos are located at adjacent positions in the structure of the compound; and S2) fully mixing the reaction solution with different nickel-containing materials, standing, taking a supernatant to determine the absorbance, comparing all of the obtained absorbance so as to evaluate the relative gram capacity of different nickel-containing materials. The evaluation method can alleviate the technical problem of low efficiency in the process of measuring the gram capacity of the nickel-containing materials by a half-cell method in the prior art, and achieve the purpose of quickly evaluating the gram capacity of the nickel-containing materials.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a method for evaluating the gram capacity of a nickel-containing material and its application. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long cycle life, safety and environmental protection, and have been widely cited in the fields of 3C products and new energy vehicles. Judging from the current development of lithium-ion battery technology for new energy vehicles, lithium-ion power batteries with nickel-containing cathode materials as the positive electrode have become the mainstream of new energy vehicle batteries. [0003] As the provider of lithium source in lithium ion battery, cathode material is one of the key materials of lithium ion battery. Compared with lithium cobalt oxide and lithium manganese oxide synthesized by traditional solid-state method, the synthesis process of nickel-containing cathode materials synthes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
Inventor 张忠如李益孝闫俊美杨勇
Owner XIAMEN UNIV