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Three-dimensional core-shell structure MoO2-MoS2 lithium ion battery cathode material and preparing method thereof

A lithium-ion battery, moo2-mos2 technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve the problems of poor product repeatability and uniformity, unfavorable large-scale production, and difficult process control, and improve cycle stability. The effect of high conductivity and conductivity, short preparation cycle and easy process control

Active Publication Date: 2016-04-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are obvious defects in the above methods. The reaction process usually requires the addition of organic solvents and high temperature and high pressure conditions. The reaction process has certain dangers, the process is difficult to control, and it is easy to cause environmental pollution. Poor, not conducive to mass production

Method used

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  • Three-dimensional core-shell structure MoO2-MoS2 lithium ion battery cathode material and preparing method thereof
  • Three-dimensional core-shell structure MoO2-MoS2 lithium ion battery cathode material and preparing method thereof
  • Three-dimensional core-shell structure MoO2-MoS2 lithium ion battery cathode material and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] A three-dimensional core-shell structure MoO 2 -MoS 2 The preparation method of lithium ion battery negative electrode material, comprises the following steps:

[0030] 1) Precursor MoO 2 preparation of

[0031] ①Weigh 1.50g of MoO 3 Place in a porcelain boat, and place the porcelain boat in a tubular atmosphere furnace;

[0032] ②At 5°C min -1 The heating rate was increased to 400°C, and the temperature was kept for 3 hours. During the reaction process, the mixed gas (volume ratio V(H 2 :Ar)=1:1), the volume flow rate is maintained at 50 sccm;

[0033] ③ After the reaction, cool to room temperature. During this process, Ar gas is always introduced, and the volume flow rate is kept at 5 sccm; the product is washed with deionized water for 3 times, and vacuum-dried at 60°C for 12 hours to obtain the product MoO 2 .

[0034] 2) MoO 2 -MoS 2 preparation of

[0035] ①Weigh the mass ratio m(MoO 2 :S)=0.50:1.00 precursor MoO2 and S powder, mix evenly and place in ...

Embodiment 2

[0042] A three-dimensional core-shell structure MoO 2 -MoS 2 The preparation method of lithium ion battery negative electrode material, comprises the following steps:

[0043] 1) Precursor MoO 2 preparation of

[0044] ①Weigh 1.60g of MoO 3 Place in a porcelain boat, and place the porcelain boat in a tubular atmosphere furnace;

[0045] ②At 6°C min -1 The heating rate was raised to 450°C, and the temperature was kept for 2.5 hours. During the reaction, the mixed gas (volume ratio V(H 2 :Ar)=1:1), the volume flow rate is maintained at 60 sccm;

[0046] ③ After the reaction, cool to room temperature. During this process, Ar gas is always introduced, and the volume flow rate is kept at 6 sccm; the product is washed with deionized water for 3 times, and vacuum-dried at 65°C for 11 hours to obtain the product MoO 2 .

[0047] 2) MoO 2 -MoS 2 preparation of

[0048] ①Weigh the mass ratio m(MoO 2 :S)=0.50:1.10 precursor MoO 2 and S powder, mix evenly and place in a porce...

Embodiment 3

[0052] A three-dimensional core-shell structure MoO 2 -MoS 2 The preparation method of lithium ion battery negative electrode material, comprises the following steps:

[0053] 1) Precursor MoO 2 preparation of

[0054] ①Weigh 1.70g of MoO 3 Place in a porcelain boat, and place the porcelain boat in a tubular atmosphere furnace;

[0055] ②At 7°C min -1 The heating rate was raised to 500°C, and the temperature was kept for 2 hours. During the reaction process, the mixed gas (volume ratio V(H 2 :Ar)=1:1), the volume flow rate is maintained at 70 sccm;

[0056] ③ After the reaction, cool to room temperature. During this process, Ar gas is always introduced, and the volume flow rate is kept at 7 sccm; the product is washed 4 times with deionized water, and vacuum-dried at 70°C for 10 hours to obtain the product MoO 2 .

[0057] 2) MoO 2 -MoS 2 preparation of

[0058] ①Weigh the mass ratio m(MoO 2 :S)=0.50:1.20 precursor MoO 2 and S powder, mix evenly and place in a por...

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Abstract

The invention discloses a three-dimensional core-shell structure MoO2-MoS2 lithium ion battery cathode material and a preparing method thereof and belongs to the technical field of lithium ion battery electrode material preparation. A MoO2 precursor is prepared firstly, and then MoS2 nanosheets are directly grown on the surface of MoO2 by means of the solid-phase in-situ synthesis method so as to prepare a MoO2-MoS2 composite material with a three-dimensional core-shell structure. The composite material with the core-shell structure is synthesized directly on the surface of the precursor through chemical reaction by means of the in-situ synthesis method, a MoO2 frame plays a role in structure supporting, stacking of the MoS2 nanosheets is avoided, and the cycle stability and conductivity of the material are improved. The preparing method is simple, the process is controllable, the preparing period is short, product repeatability is high, uniformity is high, and large-scale production is facilitated. MoO2-MoS2 prepared with the method has excellent conductivity and cycle stability and high specific discharge capacity and can be widely used as the lithium ion battery cathode material.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode material preparation, and in particular relates to a three-dimensional core-shell structure MoO 2 -MoS 2 Lithium-ion battery negative electrode material and preparation method thereof. Background technique [0002] With the rapid development of portable electronic devices and electric vehicle industries and the continuous improvement of energy storage system requirements, the research and application of lithium-ion batteries have received extensive attention. Electrode materials, as an important part of lithium-ion batteries, have also received increasing attention. The currently commercialized lithium-ion negative electrode material is graphite electrode. Although it has good conductivity, its low energy density and volume density restrict its further application in lithium-ion batteries. [0003] As an alternative material for lithium-ion battery anode materials, nanosca...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/58H01M4/1391H01M4/1397H01M10/0525
CPCH01M4/1391H01M4/1397H01M4/362H01M4/483H01M4/5815H01M10/0525Y02E60/10
Inventor 许占位沈学涛孔硌黄剑锋曹丽云李嘉胤欧阳海波乔晓宁
Owner SHAANXI UNIV OF SCI & TECH
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