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Nickel-based high-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive electrode plate and preparation method thereof

A technology of carbon nanotube modification and lithium fluoride carbon battery, which is applied in the direction of battery electrodes, active material electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of limited development and impact on battery capacity performance, and achieve increased capacity, Effect of improving voltage hysteresis and improving conductivity

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, because the electronic conductivity of fluorinated carbon is affected by the degree of fluorination, it affects the capacity performance of the battery under high-current working conditions, and its development in the field of high-energy battery technology is limited.

Method used

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  • Nickel-based high-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive electrode plate and preparation method thereof
  • Nickel-based high-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive electrode plate and preparation method thereof
  • Nickel-based high-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive electrode plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: Take ferrous ammonium sulfate, cobalt nitrate, copper nitrate, zinc acetate, nickel sulfate and Mix urea, then add it to the high-speed centrifugal dispersion tank, disperse the material in the high-speed centrifugal dispersion tank at a speed of 1500r / min for 30min, and take it out to obtain mixture A;

[0036] Step 2: Put the mixture A in a high-temperature tube furnace, and rapidly raise the temperature from room temperature to 140 °C at a rate of 15 °C / min in a flowing argon atmosphere of 100 sccm, keep it warm for 1 hour, and cool it naturally to room temperature after the heat preservation is over. After taking out, obtain product B;

[0037] Step 3: Grind the product B with a mortar for 20 minutes, then put the ground solid powder into a freeze-drying box, and let it stand at a low temperature of -10°C for 6 hours;

[0038] Step 4: Take the above product out and put it into a high-temperature tube furnace. In a flowing argon atmosphere of 100 sccm, rapid...

Embodiment 2

[0041] Step 1: Weigh ferrous chloride, cobalt carbonate, copper nitrate, zinc sulfate monohydrate, sulfuric acid according to the ratio of iron, cobalt, copper, zinc, nickel and carbon atom substance 1:1:1:1:20:50 Nickel and urea were mixed, and then added to the high-speed centrifugal dispersion tank, and the material was dispersed in the high-speed centrifugal dispersion tank at a speed of 2500r / min for 5 minutes, and the mixture A was obtained by taking it out;

[0042] Step 2: Put the mixture A in a high-temperature tube furnace, and in a flowing argon atmosphere of 100 sccm, rapidly raise the temperature from room temperature to 200°C at a rate of 30°C / min, keep it warm for 0.5h, and cool it naturally to Take out after room temperature, obtain product B;

[0043] Step 3: Grind the product B with a mortar for 25 minutes, then put the ground solid powder into a freeze-drying box, and let it stand at a low temperature of -30°C for 3 hours;

[0044] Step 4: Take the above pr...

Embodiment 3

[0047] Step 1: Weigh ferrous chloride, cobalt nitrate, copper nitrate, zinc sulfate heptahydrate, sulfuric acid according to the molar ratio of iron, cobalt, copper, zinc, nickel and carbon atoms 0.3:0.3:0.3:0.3:10:30 Nickel and urea were mixed, and then added to the high-speed centrifugal dispersion tank, and the material was dispersed in the high-speed centrifugal dispersion tank at a speed of 2000r / min for 20 minutes, and the mixture A was obtained by taking it out;

[0048] Step 2: Put the mixture A in a high-temperature tube furnace, and rapidly raise the temperature from room temperature to 180°C at a rate of 20°C / min in a flowing argon atmosphere of 100 sccm, keep it warm for 0.8h, and cool it naturally to Take out after room temperature, obtain product B;

[0049] Step 3: Grind the product B with a mortar for 30 minutes, then put the ground solid powder into a freeze-drying box, and let it stand at a low temperature of -20°C for 5 hours;

[0050] Step 4: Take the abov...

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Abstract

The invention discloses a nickel-based high-entropy alloy / carbon nanotube modified lithium carbon fluoride battery positive electrode plate. The nickel-based high-entropy alloy / carbon nanotube modified lithium carbon fluoride battery positive electrode plate comprises a current collector and an active substance coating applied onto the current collector; the active substance coating comprises the following components in percentage by mass: 70-90% of carbon fluoride powder, 5-20% of catalyst powder and 5-10% of binder, wherein the catalyst is a nickel-based high-entropy alloy / carbon nanotube composite material. According to the method, the nickel-based high-entropy alloy / carbon nanotube composite material is prepared from a compound containing an iron source, a cobalt source, a copper source, a zinc source, a nickel source and a carbon source to serve as the catalyst, and then the current collector is coated with the carbon fluoride and the catalyst; after the carbon fluoride and the nickel-based high-entropy alloy / carbon nanotubes are mixed, the conductivity of the battery positive electrode material is improved, the carbon fluoride voltage hysteresis phenomenon is improved, the capacity, the storage performance, the rate capability and the platform stability of a lithium carbon fluoride high-voltage plateau are improved, and the performance improvement of a lithium carbon fluoride battery is achieved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to an electrode sheet and a preparation method thereof, in particular to a nickel-based high-entropy alloy / carbon nanotube modified lithium carbon fluoride battery positive electrode sheet and a preparation method thereof. Background technique [0002] With the rapid development of society, environmental pollution and shortage of traditional energy sources, people need more efficient and environmentally friendly energy sources to replace or supplement traditional energy sources. Lithium fluoride batteries are the primary battery system with the highest specific energy at present, and they are safe. , The advantages of long-term charged storage, no need for maintenance and activation, are widely used in various fields of land, sea, air and electricity. Carbon fluoride has the highest theoretical specific energy among cathode materials for lithium primary batteries, and the practical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/58H01M4/13H01M4/136H01M4/139H01M4/1397H01M4/36
CPCH01M4/62H01M4/625H01M4/582H01M4/364H01M4/136H01M4/13H01M4/139H01M4/1397H01M2004/028Y02E60/10
Inventor 李嘉胤钱程胡云飞黄剑锋曹丽云罗晓敏郑裕欣岳少雄
Owner SHAANXI UNIV OF SCI & TECH
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