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A device for rapid determination of humidity sensitivity of ternary materials

A ternary material, rapid measurement technology, applied in the field of lithium-ion batteries, can solve the problems of slurry gelation and reducing the electrochemical performance of materials

Active Publication Date: 2021-05-11
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the ternary materials, especially high-nickel ternary materials, the moisture and CO in the air 2 Very sensitive, readily absorbs moisture and CO 2 And generate residual alkali on the surface, which will reduce the electrochemical performance of the material on the one hand, and lead to the gelation of the slurry in the slurry mixing process on the other hand

Method used

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  • A device for rapid determination of humidity sensitivity of ternary materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: measure LiNi 0.8 co 0.1 mn 0.1 o 2 Moisture Sensitivity of Materials

[0024] A certain amount of LiNi to be tested 0.8 co 0.1 mn 0.1 o 2 The sample is placed in the quartz tube 12, supported by quartz wool 13, the ambient temperature of the test is controlled at 25°C, the tubular resistance furnace 6 is closed, and the temperature of the constant temperature water tank 4 is set at 15°C; firstly, the six-way valve 3 is opened to In the sampling state, open the high-purity inert gas cylinder 1 and pass in high-purity argon gas. After sampling for 10 minutes, open the six-way valve 3 to the test state, and the gas in the sampling tube 5 is brought into the quartz tube 12 and passed through the sample to be tested. The sample flows out through the quartz tube 12 and enters the Karl Fischer moisture meter 7; the tubular resistance furnace 6 is opened and heated to 220°C for moisture desorption, and the value x of the moisture meter 7 is read after 30 mi...

Embodiment 2

[0025] Embodiment 2: In situ determination of LiNi 0.8 co 0.1 mn 0.1 o 2 Moisture Sensitivity of Materials

[0026] A certain amount of LiNi to be tested 0.8 co 0.1 mn 0.1 o 2 The sample is placed in the quartz tube 12, supported by quartz wool 13, the ambient temperature of the test is controlled at 25°C, and the temperature of the constant temperature water tank 4 is set at 15°C; first open the six-way valve 3 to the sampling state, and open the high-purity inert The gas cylinder 1 is filled with high-purity argon, and the tubular resistance furnace 6 is opened and heated to 220°C for moisture desorption. After 30 minutes of desorption, the tubular resistance furnace 6 is lowered to the ambient temperature; the six-way valve 3 is opened to In the test state, the gas in the sampling tube 5 is brought into the quartz tube 12 and passes through the sample to be tested, and then enters the Karl Fischer moisture meter 7 after flowing out through the quartz tube 12; the tub...

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Abstract

The invention discloses a device for quickly measuring the humidity sensitivity of ternary materials, which includes a high-purity inert gas cylinder, a dehydration pipe, a six-way valve, a constant temperature water tank, a sampling pipe, a tubular resistance furnace, a moisture tester and a temperature controller; The pure inert gas cylinder is connected to the dehydration pipe through the first pipeline, and the dehydration pipe is connected to the first interface of the six-way valve through the second pipeline; The third interface of the through valve is connected, and the outlet end of the sampling tube is connected to the fourth interface of the six-way valve through the sixth pipeline; a quartz tube for placing the sample to be tested is arranged in the tube resistance furnace, and the inlet end of the quartz tube passes through The seventh pipeline is connected to the fifth interface of the six-way valve, and the outlet end of the quartz tube is connected to the moisture tester through the eighth pipeline. The invention can carry out quantitative test and in-situ test of physical adsorption and chemical adsorption moisture on samples, and has great significance for evaluating the processing performance of ternary materials and the storage performance of lithium ion batteries.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a device for quickly measuring the humidity sensitivity of ternary materials. Background technique [0002] Ternary materials have attracted extensive attention due to their high capacity and excellent cycle performance. As the nickel content in the ternary material increases, the capacity of the material also increases, so it is considered to be the preferred cathode material for the preparation of high specific energy lithium-ion batteries. However, due to the ternary materials, especially high-nickel ternary materials, the moisture and CO in the air 2 Very sensitive, readily absorbs moisture and CO 2 And generate residual alkali on the surface, which will reduce the electrochemical performance of the material on the one hand, and cause the slurry gel in the slurry mixing process on the other hand. Therefore, the preparation of ternary batteries has high enviro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/16G01N1/44
CPCG01N1/44G01N31/164
Inventor 高玉仙陈方李道聪
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY