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Preparation method of transitional metal doped molybdenum disulfide sodium battery negative electrode material and obtained material and application thereof

A negative electrode material and transition metal technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as difficult to meet the requirements of sodium ion batteries, unsatisfactory rate performance, complicated preparation methods, etc., and achieve good ion deintercalation and transmission capabilities , good cycle stability, simple preparation method

Active Publication Date: 2018-05-11
YANCHENG INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, molybdenum disulfide is a typical two-dimensional transition metal sulfide, which has the advantage of high theoretical capacity, but due to the poor intrinsic electronic conductivity of molybdenum disulfide, it faces unsatisfactory rate performance, poor cycle performance or low specific capacity. and other shortcomings, it is difficult to meet the requirements of sodium-ion batteries
At the same time, the currently synthesized layered transition metal chalcogenides are too large in size, single in structure, and complicated preparation methods limit their application in sodium-ion batteries.

Method used

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  • Preparation method of transitional metal doped molybdenum disulfide sodium battery negative electrode material and obtained material and application thereof
  • Preparation method of transitional metal doped molybdenum disulfide sodium battery negative electrode material and obtained material and application thereof
  • Preparation method of transitional metal doped molybdenum disulfide sodium battery negative electrode material and obtained material and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Add 0.5g MoCl to 50mL ethanol 5 , 1.67g thiourea and 0.003g anhydrous FeCl 3 (wherein the molar ratio of molybdenum source and sulfur source is 1:12, and the molar ratio of transition metal salt and molybdenum source is 1:100), ultrasonic stirring obtains brown-red solution A;

[0036] (2) The solution A was magnetically stirred in the air for 2 days to obtain a uniform brown gel;

[0037] (3) Move the brown gel and the flask to a vacuum drying oven, and dry continuously in vacuum at 100°C for 2 hours to form a brown powder;

[0038] (4) Subsequently, the powder obtained in step (3) was scraped off and taken out. After grinding, it was transferred to a tube furnace and sintered at a high temperature under an Ar inert atmosphere at a temperature of 600° C. for 3 hours to prepare the transition metal-doped bismuth Molybdenum sulfide sodium battery negative electrode material;

[0039] (5) Mix the dried composite material with carbon black and carboxymethyl cellulos...

Embodiment 2

[0041] Same as Example 1, the difference is anhydrous FeCl 3 The mass of is 0.0045g (the molar ratio of transition metal salt to molybdenum source is 1.5:100).

Embodiment 3

[0043] Same as Example 1, the difference is anhydrous FeCl 3 The mass of is 0.0208g (the molar ratio of transition metal salt to molybdenum source is 7:100).

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Abstract

The invention discloses a preparation method of a transitional metal doped molybdenum disulfide sodium battery negative electrode material and an obtained material and an application thereof. A sol-gel method is adopted to prepare a doped MoS<2> nanocomposite in one step, and the nanocomposite can be used as the sodium ion battery negative electrode material; and the agglomeration phenomenon of apure MoS<2> structure can be obviously lowered, and uniform appearance and excellent performance are achieved. Compared with the prior art, the preparation method disclosed in the invention has the characteristics of low preparation cost, simple operation and short preparation period; and the prepared MoS<2> sodium ion battery negative electrode material has excellent reversible charging specificcapacity and cycle characteristic and relatively high large-scale application potential.

Description

technical field [0001] The invention relates to a preparation method of a transition metal-doped molybdenum disulfide sodium battery negative electrode material and the obtained material and application thereof, belonging to the technical field of sodium ion battery negative electrode materials. Background technique [0002] With people's widespread attention to renewable energy and new energy, as well as the vigorous development of new energy vehicles and smart grids, research and development of high specific capacity, high safety, long life, low-cost power supply and energy storage materials have become the current Internationally important frontier research directions. Compared with lithium-ion batteries, which suffer from the lack of lithium resources in the world, sodium-ion batteries have very broad application prospects due to their physical and chemical properties similar to lithium-ion batteries, abundant reserves, and low prices. [0003] Compared with lithium-ion...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M10/054
CPCH01M4/362H01M4/5815H01M10/054Y02E60/10
Inventor 罗改霞岳鹿张文惠张勤芳徐宁
Owner YANCHENG INST OF TECH
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