High-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive plate, preparation method thereof and lithium carbon fluoride battery

A lithium fluoride battery and carbon nanotube modification technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, circuits, etc., can solve problems such as hindering application, reduced electronic conductivity, poor rate performance, etc., and achieve high voltage The effect of platform and platform stability, improving rate capability, and improving electrochemical reactivity

Pending Publication Date: 2022-01-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rate capability of Li / CFx cells is poor because the electronic conductivity of CFx decreases with the increase of fluorine content.
These inherent disadvantages seriously hinder its application in high-power devices

Method used

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  • High-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive plate, preparation method thereof and lithium carbon fluoride battery
  • High-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive plate, preparation method thereof and lithium carbon fluoride battery
  • High-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive plate, preparation method thereof and lithium carbon fluoride battery

Examples

Experimental program
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preparation example Construction

[0038] This embodiment provides a method for preparing a positive electrode sheet of a high-entropy alloy / carbon nanotube modified lithium carbon fluoride battery, which includes the following steps:

[0039] Step 1, preparing high-entropy alloy / carbon nanotube composite material, the specific method is:

[0040] Step 1.1, according to iron, cobalt, copper, zinc, indium, nickel, carbon atom molar ratio is (0.1-1):(0.1-1):(0.1-1):(0.1-1):(0.1-1) :(5-20):(20-50) Weigh the iron source, cobalt source, copper source, zinc source, indium source, nickel source and carbon source respectively and mix them into the mortar, grind them to mix evenly, and get the mixture A;

[0041] Step 1.2, put the mixture A into a high-temperature tube furnace, raise the temperature from room temperature to 150-180°C at a rate of 10-30°C / min under an inert atmosphere, and then keep it warm for 0.5-2h;

[0042] Step 1.3, close the high-temperature tube furnace, take it out after the temperature in the ...

Embodiment 1

[0052] A method for preparing a high-entropy alloy / carbon nanotube modified lithium carbon fluoride battery cathode sheet, comprising the following steps:

[0053]Step 1, preparing high-entropy alloy / carbon nanotube composite material, the specific method is:

[0054] Step 1.1, according to iron, cobalt, copper, zinc, indium, nickel, carbon atom molar ratio is 0.1: 0.128: 0.155: 0.17: 0.124: 5.78: 24.78 respectively weigh ammonium oxalate iron salt, cobalt nitrate, copper nitrate, zinc acetate , indium nitrate, nickel nitrate hexahydrate, and melamine were mixed and added to an agate mortar, ground for 20 minutes, and mixed evenly to obtain mixture A;

[0055] Step 1.2, put the mixture A into a high-temperature tube furnace, heat it from room temperature to 180°C at a rate of 30°C / min under a nitrogen atmosphere of 80sccm, and then keep it warm for 0.5h;

[0056] Step 1.3, close the high-temperature tube furnace, take it out after the temperature in the furnace drops to room ...

Embodiment 2

[0064] A method for preparing a high-entropy alloy / carbon nanotube modified lithium carbon fluoride battery cathode sheet, comprising the following steps:

[0065] Step 1, preparing high-entropy alloy / carbon nanotube composite material, the specific method is:

[0066] Step 1.1, weigh ferrous ammonium sulfate, cobalt carbonate, cuprous chloride, Zinc sulfate, indium sulfate, nickel sulfate and urea were mixed and added to an agate mortar, ground for 15 minutes, and mixed evenly to obtain mixture A;

[0067] Step 1.2, put the mixture A into a high-temperature tube furnace, heat it from room temperature to 150°C at a rate of 10°C / min under a nitrogen atmosphere of 120 sccm, and then keep it warm for 2 hours;

[0068] Step 1.3, close the high-temperature tube furnace, take it out after the temperature in the furnace drops to room temperature, and then seal it in a glass bottle filled with argon through the glove box, and put the glass bottle into a microwave synthesis instrument...

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Abstract

The invention discloses a high-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive plate and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing a high-entropy alloy/carbon nanotube composite material; step 2, weighing 70%-90% of carbon fluoride, 5%-20% of the high-entropy alloy/carbon nanotube composite material and 5%-10% of a binder in percentage by mass, grinding and uniformly mixing, then adding a solvent, and uniformly stirring to obtain positive electrode slurry with flowability; and step 3, uniformly coating an aluminum foil or a carbon-coated aluminum foil with the positive electrode slurry by using a film coating device, and carrying out vacuum drying to remove the solvent to obtain the high-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive electrode plate. The invention also provides a lithium carbon fluoride battery. The lithium carbon fluoride battery comprises an electrolyte, a diaphragm, a negative plate and the high-entropy alloy/carbon nanotube modified lithium carbon fluoride battery positive plate. The prepared positive plate can improve the conductivity and rate capability of the lithium carbon fluoride battery, and improve the specific energy and storage performance of the battery.

Description

technical field [0001] The invention relates to a lithium fluoride battery, in particular to a high-entropy alloy / carbon nanotube modified lithium fluoride battery positive plate, a preparation method thereof, and a lithium fluoride battery. Background technique [0002] Lithium-ion batteries are currently widely used in portable electronics and electric vehicles, but there is still a need for cheaper, more advanced battery systems with higher energy and power density, and better safety performance. Among them, carbon fluoride (CFx) is one of the cathode materials with the highest capacity for primary lithium batteries. As a result, Li / CFx primary cells are significantly superior to other competing primary Li-ion cells, and have an ultra-long shelf life, wide operating temperature range, and flat discharge voltage. However, the rate performance of Li / CFx cells is poor because the electronic conductivity of CFx decreases with increasing fluorine content. These inherent disa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/139H01M4/62
CPCH01M4/13H01M4/625H01M4/139Y02E60/10
Inventor 李嘉胤钱程郑裕欣黄剑锋曹丽云胡云飞张金津王怡婷
Owner SHAANXI UNIV OF SCI & TECH
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