Sn nano half-crescent particle-2DLMG composite material synthesized by utilizing organic molecular confinement reaction and method

A nanoparticle, nanotechnology, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, which can solve problems such as expensive, environmentally damaging, complex, etc.

Active Publication Date: 2021-01-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although obtaining the structure must involve a complex, environmentally damaging and expensive process
In addition, in order to pursue high capacity and cyclability, the balance between tap density and specific capacity is sacrificed at the same time

Method used

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  • Sn nano half-crescent particle-2DLMG composite material synthesized by utilizing organic molecular confinement reaction and method
  • Sn nano half-crescent particle-2DLMG composite material synthesized by utilizing organic molecular confinement reaction and method
  • Sn nano half-crescent particle-2DLMG composite material synthesized by utilizing organic molecular confinement reaction and method

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preparation example

[0037] According to the principle of the present invention, a preferred preparation example of Sn nano-half crescent particle-graphene nanosheet (2DLMG) composite material is provided below, the steps are as follows:

[0038] (1) Synthesis of 3D organic nanoframes in nanodroplets. The whole process is briefly described as follows: 50 wt.% TPGDA (monomer), 5 wt.% HCPK (photoinitiator, relative to the amount of TPGDA) and 50 wt.% Labrafac® WL 1349 were mixed as an oil phase. Then, Kolliphor ELP (hydrophilic surfactant) was added to the oil phase and mixed by a vortex mixer. Afterwards, water was quickly poured into the above mixed phase for spontaneous emulsification. Control the ratio of surfactant, oil phase and water phase in the nanoemulsion to 3:3:4. Once the nanoemulsion is formed, due to its confinement effect, the TPGDA in the nanodroplets is photopolymerized to form a 3D nanoorganic framework.

[0039] (2) Sn nano-half-moon particles were infiltrated into 2DLMG to synt...

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Abstract

The invention discloses a method for synthesizing a Sn nano half-crescent particle 2DLMG composite material by utilizing an organic molecule constraint reaction. The method comprises the following steps of infiltrating a tin source into a 3D nano organic framework nano emulsion to obtain a suspension; the suspension liquid being subjected to a hydrothermal reaction, and a tin source being converted into SnO2 nano-particles; calcining the hydrothermal reaction product at a high temperature in an inert environment, and converting SnO2 nano-particles and the 3D organic nano-frame into Sn nano half-crescent particles and 2DLMG in situ to form an Sn nano half-crescent particle/2DLMG composite material in which the Sn nano-particles permeate into the 2DLMG; wherein the tin source is a substancewhich is soluble in water and can be converted into SnO2 nanoparticles under hydrothermal reaction conditions. According to the preparation method, permeation of SnO2 nano-particles into the graphenelayer is completed through carbonization of the mixture, the obtained material has high capacity and recyclability, and the application performance of the material is improved from the aspect of structural design.

Description

technical field [0001] The invention relates to a Sn nano-half crescent particle-2DMLG lithium ion battery negative electrode material and a preparation method thereof, belonging to the technical field of composite material preparation. Background technique [0002] To cope with the growing demand for portable devices and the depletion of oil reserves, the development of highly efficient stored energy units is an important part of forming a new energy cycle consisting of clean energy and stored energy devices. Among the existing storage devices, lithium-ion batteries (LIBs) have become the most popular batteries in the past four decades due to their unique characteristics such as environmental protection, light weight, safety, etc. Therefore, it is necessary to develop an anode material with high specific capacity and recyclability to replace graphite instead of lithium (commercial anode material with a theoretical capacity of 372 mAh g -1 ) is an important method. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/38H01M10/0525B82Y30/00B82Y40/00
CPCH01M4/387H01M4/628H01M10/0525B82Y30/00B82Y40/00H01M2004/027H01M2004/021Y02E60/10
Inventor 丁书凯杜高辉许并社程伟
Owner SHAANXI UNIV OF SCI & TECH
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