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A preparation method of vanadium-doped titanium carbon sulfide battery negative electrode material and its obtained material and application

A technology of vanadium-doped titanium carbon sulfide, battery negative electrode, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of difficult lithium ion intercalation, limited lithium storage capacity, etc., and achieve good conductivity, high specific capacity, Simple preparation process

Active Publication Date: 2020-09-18
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However pure Ti 2 Due to the tight interlayer structure of SC, it is difficult for lithium ions to intercalate, so its lithium storage capacity is still very limited.

Method used

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  • A preparation method of vanadium-doped titanium carbon sulfide battery negative electrode material and its obtained material and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 64.91g of Ti powder with a particle size of 400 mesh, 22.89g of S powder with a particle size of 400 mesh, 8.57g of C powder with a particle size of 400 mesh, and 3.64g of V powder with a particle size of 400 mesh. Mix evenly and place in a vacuum ball milling tank and pass in argon gas, use cemented carbide balls as grinding balls, and ball mill at a speed of 400r / min for 3 hours according to the ball-to-material ratio of 10:1 to obtain an activated powder. Place the activated powder in a graphite crucible and place a tungsten wire coil on the surface, place the graphite crucible in a self-propagating high-temperature synthesis device to evacuate and fill it with argon, and energize the tungsten wire coil to ignite the activated powder by ball milling for self-propagation. Propagation reaction, block product. Put the bulk product in a ball mill jar, use cemented carbide balls as grinding balls, and ball mill at a speed of 400r / min for 3 hours according to the bal...

Embodiment 2

[0025] Weigh 61.36g of Ti powder with a particle size of 400 mesh, 22.84g of S powder with a particle size of 400 mesh, 8.55g of C powder with a particle size of 400 mesh, and 7.26g of V powder with a particle size of 400 mesh. Mix evenly and place in a vacuum ball milling tank and pass in argon gas, use cemented carbide balls as grinding balls, and ball mill at a speed of 400r / min for 3 hours according to the ball-to-material ratio of 10:1 to obtain an activated powder. Place the activated powder in a graphite crucible and place a tungsten wire coil on the surface, place the graphite crucible in a self-propagating high-temperature synthesis device to evacuate and fill it with argon, and energize the tungsten wire coil to ignite the activated powder by ball milling for self-propagation. Propagation reaction, block product. Put the bulk product in a ball mill jar, use cemented carbide balls as grinding balls, and ball mill at a speed of 400r / min for 3 hours according to the bal...

Embodiment 3

[0027] Weigh 50.80g of Ti powder with a particle size of 400 mesh, 22.69g of S powder with a particle size of 400 mesh, 8.50g of C powder with a particle size of 400 mesh, and 18.02g of V powder with a particle size of 400 mesh. Mix evenly and place in a vacuum ball milling tank and pass in argon gas, use cemented carbide balls as grinding balls, and ball mill at a speed of 400r / min for 3 hours according to the ball-to-material ratio of 10:1 to obtain an activated powder. Place the activated powder in a graphite crucible and place a tungsten wire coil on the surface, place the graphite crucible in a self-propagating high-temperature synthesis device to evacuate and fill it with argon, and energize the tungsten wire coil to ignite the activated powder by ball milling for self-propagation. Propagation reaction, block product. Put the bulk product in a ball mill jar, use cemented carbide balls as grinding balls, and ball mill at a speed of 400r / min for 3 hours according to the ba...

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Abstract

The invention discloses a preparation method of a vanadium-doped carbon sulfide titanium battery negative electrode material. The preparation method of the vanadium-doped carbon sulfide titanium battery negative electrode material comprises the following steps: (1) weighing vanadium powder, titanium powder, sulfur powder and carbon powder, and ball-milling to obtain initial raw materials; (2) performing high-temperature self-propagating reaction on the initial raw materials to prepare a solid block-shaped sample; (3) performing ball-milling treatment on the solid block-shaped sample to obtaina powdered small-granule sample; and (4) performing ultrasonic treatment, centrifugation and drying on the powdered small-granule sample to obtain the vanadium-doped carbon sulfide titanium battery negative electrode material. The invention also discloses the vanadium-doped carbon sulfide titanium battery negative electrode material prepared by the preparation method as well as application of thevanadium-doped carbon sulfide titanium battery negative electrode material to preparation of a lithium ion battery. Compared with the prior art, the preparation process is simple, rapid and pollution-free, and the vanadium-doped carbon sulfide titanium battery negative electrode material prepared by the method has high specific capacity, has high conductivity, electrochemical activity and cyclingstability and is particularly suitable for manufacturing the lithium ion battery negative electrode.

Description

technical field [0001] The invention relates to a preparation method of a vanadium-doped carbon sulfide titanium battery negative electrode material and the obtained material and application thereof, belonging to the technical field of lithium ion battery negative electrode materials. Background technique [0002] Rechargeable lithium-ion batteries (LIBs) are the most widely used electrical energy storage devices because of their high voltage, high energy density (low volume and weight), low self-discharge rate, and long cycle life. Lithium-ion batteries are used in a wide range of applications ranging from micro-devices to transportation and stationary storage, with a wide range of performance requirements including high power, high energy density, long cycle life and more. Wide operating temperature range. Alternative materials are being investigated to meet these requirements. [0003] Ti 2 SC is the species with the lowest c / a ratio in the S-containing MAX phase. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/0525
CPCH01M4/5815H01M10/0525H01M2004/027Y02E60/10
Inventor 许剑光樊润泽张宇罗驹华
Owner YANCHENG INST OF TECH
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