Bismuth antimony telluride/graphene potassium ion battery negative electrode material with high-stability structure and preparation method thereof

A battery negative electrode, bismuth antimony telluride technology, applied to battery electrodes, active material electrodes, negative electrodes, etc., can solve the problems of difficult and limited kinetics and stability, and achieve simple and fast methods, enhance electrical conductivity, and inhibit The effect of volume deformation

Active Publication Date: 2021-07-16
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Bi 0.4 Sb 1.6 Te 3 As a negative electrode for PIBs, it is still limited by volume expansion, shuttling of soluble intermediates, and large K + Kinetic and stability challenges

Method used

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  • Bismuth antimony telluride/graphene potassium ion battery negative electrode material with high-stability structure and preparation method thereof
  • Bismuth antimony telluride/graphene potassium ion battery negative electrode material with high-stability structure and preparation method thereof
  • Bismuth antimony telluride/graphene potassium ion battery negative electrode material with high-stability structure and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment prepares the Bi with high stability structure according to the following steps 0.4 Sb 1.6 Te 3 / Graphene potassium ion battery anode material:

[0029] Step 1. Weigh 6.3mg of BiCl 3 Dissolve in 40 μL concentrated HNO with a mass fraction of 68% 3 In, get BiCl 3 nitric acid solution;

[0030] Weigh 5mL of 2.21mg mL –1 Graphene oxide dispersion and sonicated for 1 h; then added BiCl 3 Nitric acid solution, 18.2 mg of SbCl 3 , 0.4 g of tartaric acid and stirred until dissolved; then added 33 mg of Na 2 TeO 3 , 20mL ammonia water and 8mL hydrazine hydrate and continue stirring for 3h to obtain a mixed reaction solution.

[0031] Step 2. Pour the mixed reaction liquid obtained in step 1 into a reaction kettle, react at 180°C for 5 hours, then collect the reaction precipitate by centrifugation, wash with distilled water and absolute ethanol several times, and dry it in vacuum at 60°C for 24 hours to obtain potassium ions Bi of battery anode materia...

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Abstract

The invention discloses a bismuth antimony telluride/graphene potassium ion battery negative electrode material with a high-stability structure and a preparation method thereof. The bismuth antimony telluride/graphene potassium ion battery negative electrode material is prepared by adopting a one-step hydrothermal method, the material is of a sandwich layered stacked structure, and is obtained by modifying Bi0.4Sb1.6Te3 nanoparticles between graphene layers. The preparation method disclosed by the invention is simple and rapid, and the obtained product shows excellent potassium ion storage specific capacity, high-current charge-discharge performance and cycling stability.

Description

technical field [0001] The invention relates to a preparation method of a bismuth antimony telluride / graphene composite material with a high stability structure and its application as a negative electrode material of a potassium ion battery, belonging to the field of carbon-based nanomaterials. Background technique [0002] The dwindling and price increase of lithium resources have seriously restricted the sustainable development of the energy market. Therefore, a new type of energy storage system is urgently needed as an alternative. Potassium-ion batteries (PIBs) are favored for their abundant reserves, low price, and similar physical and chemical properties and standard potential to lithium, however, the K + Excessive size can easily lead to slow electrode kinetics and increased volume expansion, resulting in poor life and rate performance of PIBs, which is difficult to meet market requirements. Therefore, the development of novel PIBs electrodes with high kinetics and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/58H01M10/054
CPCH01M4/625H01M4/628H01M4/581H01M10/054H01M2004/027H01M2004/021Y02E60/10
Inventor 张龙海张双桂张朝峰王睿许玉玲李浩马全伟陈琪刘阿雪
Owner ANHUI UNIVERSITY
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