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Electrochemical lithium storage electrode of composite nano material, and preparation method thereof

A composite nanomaterial, electrochemical technology, applied in the field of lithium ion electrode material and its application in electrochemical lithium storage electrode

Inactive Publication Date: 2020-08-21
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, such MoS 2 / B-doped graphene composite nanomaterials as electrodes for electrochemical lithium storage active materials and their preparation methods have not been publicly reported

Method used

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  • Electrochemical lithium storage electrode of composite nano material, and preparation method thereof
  • Electrochemical lithium storage electrode of composite nano material, and preparation method thereof
  • Electrochemical lithium storage electrode of composite nano material, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of MoS via a one-step hydrothermal reaction pathway 2 / B-doped graphene composite nanomaterials, and use the composite materials as electrochemically active materials to prepare electrodes for electrochemical lithium storage:

[0021] (1)MoS 2 / B- Preparation of doped graphene composite nanomaterials: disperse graphene oxide evenly in deionized water under the action of ultrasonic waves to form a uniform suspension, then add the metered boric acid solution dropwise to the graphite oxide containing graphite under stirring In the suspension of ene, and keep stirring for 12h, then will contain Na 2 MoO 4 and the mixed solution of L-cysteine ​​were added to the above-mentioned mixed suspension under stirring to obtain a hydrothermal reaction mixture containing 1.5mmolNa 2 MoO 4 , 7.5mmol L-cysteine, 3.0mmol graphene oxide (calculated as carbon element), the amount of material of boric acid content is 1.0, 2.0 or 5.0mmol respectively; In the kettle, use deio...

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Abstract

The invention discloses an electrochemical lithium storage electrode of a composite nano material, and a preparation method of the electrochemical lithium storage electrode. According to the electrode, a MoS2 / B-doped graphene composite nano material is used as an active substance for electrochemical lithium storage. The preparation method comprises the following steps: in the presence of grapheneoxide and boric acid in a hydrothermal solution containing Na2MoO4 and L-cysteine, performing a one-step hydrothermal reaction to obtain a MoS2 / B-doped graphene composite nano material, wherein in thecomposite material, a MoS2 layer shows more defects or edges and is uniformly loaded on B-doped graphene; and blending the prepared MoS2 / B-doped graphene composite nano material, conductive acetyleneblack and polyvinylidene fluoride into uniform slurry, coating copper foil with the slurry, and rolling to obtain the electrochemical lithium storage electrode of the composite nano material. The electrode has the advantages of high reversible specific capacity of electrochemical lithium storage, stable cycle performance and good high-rate charge-discharge performance.

Description

technical field [0001] The invention relates to an electrochemical lithium storage electrode of a composite nanomaterial and a preparation method thereof, in particular to the use of MoS 2 The invention relates to an electrochemical lithium storage electrode and a preparation method thereof, which use a B-doped graphene composite nanomaterial as an electrochemical active material, and belong to the technical field of lithium ion electrode materials and their application in electrochemical lithium storage electrodes. Background technique [0002] Electrode materials for high-performance electrochemical lithium storage and their application in electrochemical lithium storage electrodes are of great significance for the development of high-performance lithium-ion batteries. MoS 2 It has a typical layered structure, and its layered structure is formed by connecting and superimposing the S-Mo-S layers of the sandwich structure through the action of van der Waals force. MoS 2 A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M10/0525C01B32/182B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/182H01M4/362H01M4/5815H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 施璐宋文龙李丹罗秋月田庆山刘红杰李靖陈羽婷甄爱钢方明学毛书彦袁文锐
Owner TIANNENG BATTERY GROUP
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