Preparation method of metalloid graphene negative electrode material and battery

A metal graphite, negative electrode material technology, applied in negative electrodes, electrode manufacturing, battery electrodes, etc., can solve the problems of low conductivity of nanocomposite materials, and achieve the effect of reducing rearrangement, stable circulation, and buffering volume changes

Inactive Publication Date: 2018-11-13
XIFENG 2D FUJIAN MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these MoS-based 2 The electrical conductivity of the nanocomposite remains low

Method used

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  • Preparation method of metalloid graphene negative electrode material and battery
  • Preparation method of metalloid graphene negative electrode material and battery
  • Preparation method of metalloid graphene negative electrode material and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of graphene oxide: the H 2 SO 4 and H 3 PO 4 Mix at a volume ratio of 9:1 to obtain concentrated H 2 SO 4 / H 3 PO 4 Mixed solution; 1.5g graphite powder and 9g potassium permanganate (KMnO 4 ) were evenly mixed; then 180mL concentrated H 2 SO 4 / H 3 PO 4 Add graphite powder and KMnO to the mixed solution 4 Then, the mixture was heated to 50°C and kept stirring for 20h; then the reaction solution was poured into 200mL of ice water, and 30% hydrogen peroxide was added dropwise to the solution until the color of the solution became golden yellow; Then the mixture was centrifuged at 4000 rpm for 30 min, and the resulting mixture was washed with deionized water and extracted in ethanol; finally, the extract was freeze-dried for 24 h to obtain graphene oxide (GO).

[0043] Graphene oxide and ammonium molybdate mixed treatment: first 60mg ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) and 1.5g thiourea (CN 2 h 4 S) carry out homogeneous mixing; ...

Embodiment 2

[0051] Preparation of graphene oxide: first, the H 2 SO 4 and H 3 PO 4 Mix at a volume ratio of 9:1 to obtain concentrated H 2 SO 4 / H 3 PO 4 Mixed solution; 2g graphite powder and 10g potassium permanganate (KMnO 4 ) were evenly mixed; then 180mL concentrated H 2 SO 4 / H 3 PO 4 Add graphite powder and KMnO to the mixed solution 4Then, the mixture was heated to 55°C and kept stirring for 22h; then the reaction solution was poured into 200mL of ice water, and then 30% hydrogen peroxide was added dropwise to the solution until the color of the solution became golden yellow; Then the mixture was centrifuged at 4000 rpm for 60 min, and the resulting mixture was washed with deionized water and extracted in ethanol; finally, the extract was freeze-dried for 24 h to obtain graphene oxide (GO).

[0052] Graphene oxide and ammonium molybdate mixed treatment: first 60mg ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) and 2g thiourea (CN 2 h 4 S) carry out homogeneous ...

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PUM

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Abstract

The invention discloses a preparation method of a metalloid graphene negative electrode material and a battery. The method includes the steps: preparing oxidized graphene; mixing the prepared oxidizedgraphene with ammonium molybdate; performing hydrothermal reaction on mixture to obtain a 1T-MoS2 / graphene composite material with a layered three-dimensional structure. The 1T-MoS2 / graphene composite material is provided with an atomic-scale sandwiched three-layer nanostructure with a good interface, is a vertically stacked ultrathin two-dimensional layered graphene sheet / two-dimensional 1T-MoS2layered heterogeneous material, serves as a lithium / sodium ion battery and lithium / sodium double-ion battery negative electrode material and has high reversible capacity, ultra-long cycle life, excellent coulombic efficiency and high rate performance.

Description

technical field [0001] The invention relates to technical fields such as batteries, in particular to a method for preparing a metal-like graphene negative electrode material and a battery. Background technique [0002] Due to the continuous consumption of traditional fossil energy and serious global environmental problems, it is increasingly important to develop green and sustainable energy. Various promising energy storage devices such as metal-ion batteries, metal-air batteries, metal sulfide batteries, and dual-ion batteries have been invented. And has been committed to the research of electrode materials with high capacity and excellent conductivity to replace the current state-of-the-art graphite anode materials, because of the low theoretical capacity of graphite anode materials (372mAh g -1 ) and limited reversible capacity. Molybdenum disulfide (MoS 2 ) is a typical low-cost two-dimensional material, because MoS 2 Has the same layered structure as graphite and hi...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/133H01M4/02H01M4/36H01M4/583
CPCH01M4/02H01M4/0471H01M4/133H01M4/366H01M4/583H01M2004/027Y02E60/10
Inventor 许志
Owner XIFENG 2D FUJIAN MATERIAL TECH CO LTD
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