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Three-dimensional porous black phosphorene/graphene for magnesium ion battery as well as preparation method and applicationgrapheme thereof

A technology for dimensionally porous black phosphorene and magnesium ion batteries, which can be applied to battery electrodes, secondary batteries, circuits, etc., and can solve the problems of cumbersome process and easy influence on the stability of nano black phosphorene

Active Publication Date: 2020-08-18
SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is not only cumbersome, but also easily affects the stability of nano black phosphorene during reduction.

Method used

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  • Three-dimensional porous black phosphorene/graphene for magnesium ion battery as well as preparation method and applicationgrapheme thereof
  • Three-dimensional porous black phosphorene/graphene for magnesium ion battery as well as preparation method and applicationgrapheme thereof
  • Three-dimensional porous black phosphorene/graphene for magnesium ion battery as well as preparation method and applicationgrapheme thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Weigh 500mg of red phosphorus, 80mg of tin powder and 40mg and mix them evenly, put them into a quartz ampoule with a length of 12cm and an inner diameter of 1cm, pass high-purity argon to remove the air, seal it with an oxygen-hydrogen flame, place it in a muffle furnace, and heat it at 1°C / min to 650°C, keep warm for 5h and then cool down to 500°C at 0.3°C / min, keep warm at this temperature for 2h and then cool down to room temperature naturally, break open the quartz ampoule with a tool, take out the black phosphorus crystal and wash it with hot toluene for several times , vacuum-dried to obtain black phosphorus crystals;

[0090] Take 7.75g (0.02mol) of tetrabutylammonium hexafluorophosphate cationic intercalation agent and dissolve it in 40mL N,N-dimethylformamide as the electrolyte, and clamp black phosphorus crystals with a size of 5*5*10mm on the electrode holder As a working electrode, a 10*10*0.5mm platinum plate electrode is used as a counter electrode, and ...

Embodiment 2

[0103] The three-dimensional porous black phosphorene / graphene composite was prepared by the same steps as in Example 1, except that the mass ratio of black phosphorene to graphene in the nano black phosphorene dispersion was 1:0.6.

[0104] After testing, the SEM image of the product prepared in this embodiment is as follows Image 6 As shown, the composite material has a three-dimensional porous structure, and black phosphorene is uniformly dispersed on the graphene skeleton.

[0105] The same steps as in Example 1 were used to prepare and assemble a battery, and further performance tests showed that the battery had better electrochemical performance.

Embodiment 3

[0107] The three-dimensional porous black phosphorene / graphene composite was prepared by the same steps as in Example 1, except that the mass ratio of black phosphorene to graphene in the nano black phosphorene dispersion was 1:4.

[0108] After testing, the SEM image of the product prepared in this embodiment is as follows Figure 7 As shown, the composite material has a three-dimensional porous structure, and black phosphorene is uniformly dispersed on the graphene skeleton.

[0109] The same steps as in Example 1 were used to prepare and assemble a battery, and further performance tests showed that the battery had better electrochemical performance.

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Abstract

The invention discloses three-dimensional porous black phosphorene / graphene for a magnesium ion battery as well as a preparation method and an application thereof. The three-dimensional porous black phosphorene / graphene takes three-dimensional porous graphene as a skeleton, and nano black phosphorene is uniformly distributed on the surface of the graphene; the surface of the nano black phosphoreneis positively charged, and the nano black phosphorene is stably combined with the graphene through electrostatic adsorption; and the slice thickness of the nano black phosphorene is less than or equal to 10nm, and the slice size is less than 500nm. The invention discloses the three-dimensional porous black phosphorene / graphene for the magnesium ion battery for the first time, and the three-dimensional porous black phosphorene / graphene has a special shape, can be used as a negative electrode material of the magnesium ion battery, has excellent electrochemical performance on one hand, liberatesthe magnesium ion battery from the dilemma that a traditional conventional simple ion salt / organic electrolyte system cannot be used on the other hand, and provides possibility for further developinga high-voltage positive electrode material and improving the energy density of the magnesium ion battery.

Description

technical field [0001] The invention relates to the technical field of magnesium ion batteries, in particular to a three-dimensional porous black phosphorene / graphene for magnesium ion batteries and its preparation method and application. Background technique [0002] With the increasingly prominent energy and environmental issues, the development of new renewable energy is imminent, and efficient, sustainable and stable new energy storage technology is of great significance to the development and utilization of new energy. Magnesium-ion batteries are low in price due to abundant magnesium resources, low reduction potential (-2.37V vs. SHE), and high volume specific capacity (3833mAh cm -3 ), no dendrite formation, high safety, and good application prospects in large-scale power battery systems, and is rapidly becoming a promising energy storage and conversion technology. However, the metal magnesium anode is easy to react with the traditional electrolyte to form a passivat...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/587H01M10/054
CPCH01M4/364H01M4/38H01M4/587H01M10/054H01M2004/027Y02E60/10
Inventor 贾冬玲
Owner SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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