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CuNi composite CNTs modified diaphragm as well as preparation method and application thereof

A separator and modification technology are applied in the field of battery modified separators and their preparation, CuNi composite CNTs modified separators and their preparation fields, to achieve the effects of improving the performance of lithium fluorocarbon batteries, improving the conductivity of positive electrodes, and providing good protection.

Pending Publication Date: 2022-01-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small quantity and high price of separators in the current market, they are mainly used in the field of power lithium battery manufacturing. Therefore, how to make full use of each separator and improve the performance of the separator thickness uniformity and mechanical properties is particularly important.

Method used

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  • CuNi composite CNTs modified diaphragm as well as preparation method and application thereof
  • CuNi composite CNTs modified diaphragm as well as preparation method and application thereof
  • CuNi composite CNTs modified diaphragm as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Weigh copper nitrate, nickel sulfate and urea according to the atomic substance ratio of copper, nickel and carbon 1:8:21 and mix them, add them to the high-speed centrifugal dispersion tank, and put the materials in the high-speed centrifugal dispersion tank at 1500r / The rotation speed of min was dispersed for 5 minutes, and then the mixture A was obtained by taking it out;

[0031] Step 2: Put the mixture A in a high-temperature tube furnace, and in a flowing argon atmosphere of 100 sccm, first rapidly raise the temperature from room temperature to 160°C at a rate of 10°C / min, keep it warm for 0.5h, and cool it down naturally Take it out at room temperature to obtain product B;

[0032] Step 3: Grind the product B with a mortar for 20 minutes, then put the ground solid powder into a sealed glove box, place it in a crucible under a flowing argon atmosphere of 100 sccm, and in an induction alternating magnetic field environment, the material in the crucible Cu...

Embodiment 2

[0035] Step 1: Weigh copper sulfate, nickel nitrate and melamine according to the atomic substance ratio of copper, nickel and carbon 1:10:30 and mix them, add them to the high-speed centrifugal dispersion tank, and put the materials in the high-speed centrifugal dispersion tank at 2000r / The rotation speed of min was dispersed for 10 minutes, and then the mixture A was obtained by taking it out;

[0036] Step 2: Put the mixture A in a high-temperature tube furnace, and in a flowing nitrogen atmosphere of 100 sccm, first rapidly raise the temperature from room temperature to 200 °C at a rate of 15 °C / min, keep it warm for 1 hour, and cool it naturally to room temperature after the heat preservation is over. Take out under the condition, obtain product B;

[0037] Step 3: Grind product B with a mortar for 25 minutes, then put the ground solid powder into a sealed glove box, place it in a crucible under a flowing nitrogen atmosphere of 100 sccm, and cut the material in the cruci...

Embodiment 3

[0040] Step 1: Weigh copper sulfate, nickel bromide and glucose according to the atomic substance ratio of copper, nickel and carbon 1:20:20 and mix them, add them to the high-speed centrifugal dispersion tank, and place the materials in the high-speed centrifugal dispersion tank at 2500r / min speed of dispersion for 15min, then take out to obtain the mixture A;

[0041] Step 2: Put the mixture A in a high-temperature tube furnace, and in a flowing argon atmosphere of 100 sccm, first rapidly raise the temperature from room temperature to 250°C at a rate of 20°C / min, keep it warm for 0.8h, and then cool it down naturally Take it out at room temperature to obtain product B;

[0042] Step 3: Grind product B with a mortar for 30 minutes, then put the ground solid powder into a sealed glove box, place it in a crucible under a flowing hydrogen atmosphere of 100 sccm, and cut the material in the crucible under an induction alternating magnetic field environment The magnetic inductio...

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Abstract

The invention discloses a CuNi composite CNTs modified diaphragm. The CuNi composite CNTs modified diaphragm comprises a diaphragm base membrane and a CuNi composite CNTs material coating, wherein the diaphragm base membrane is coated with the CuNi composite CNTs material coating; the diaphragm base membrane is any one of a polypropylene diaphragm, a polyethylene diaphragm or a multi-layer composite diaphragm; the thickness of the CuNi composite CNTs material coating is 2-15 [mu] m. The invention further provides a preparation method and application of the CuNi composite CNTs modified diaphragm. According to the CuNi composite CNTs modified diaphragm disclosed by the invention, the conductivity of a positive electrode is improved, battery expansion is relieved, side reaction of the positive electrode and electrolyte is inhibited, and a high-performance lithium carbon fluoride battery is prepared; according to the method, the technological process is simple, the modification cost is low, the mechanical strength and puncture strength of the modified diaphragm are improved, the safety and self-discharge performance of the battery are good, and the method has great practical significance for improving the high-performance lithium carbon fluoride battery and the preparation method of the high-performance lithium carbon fluoride battery.

Description

technical field [0001] The invention belongs to the field of battery technology, and relates to a battery modified diaphragm and a preparation method thereof, in particular to a CuNi composite CNTs modified diaphragm, a preparation method and an application thereof. Background technique [0002] Lithium fluoride batteries are primary batteries with high energy density, and the practical specific energy can reach 250-700Wh / kg, which is several times that of dry batteries, and the battery can be easily miniaturized and lightened. In the structure of lithium fluoride carbon battery, the diaphragm is one of the key inner components. The separator is mainly located between the positive electrode and the negative electrode, and its main function is to separate the active materials of the positive and negative electrodes to prevent the short circuit of the two electrodes due to contact; in addition, during the electrochemical reaction, it can maintain the necessary electrolyte and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/431H01M50/449H01M6/14H01M6/16
CPCH01M50/403H01M50/431H01M50/449H01M6/14H01M6/16
Inventor 李嘉胤钱程郑裕欣黄剑锋曹丽云冯亮亮胡云飞张帅
Owner SHAANXI UNIV OF SCI & TECH
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