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Flexible positive and negative electrode material for high-performance magnesium-lithium double-salt ion battery and preparation method thereof

A technology of positive electrode material and negative electrode material, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of insufficient electrochemical performance of magnesium-lithium double-salt batteries, poor electrical conductivity and structural stability, and low activity of negative electrode materials. , to achieve the effect of improving capacity and cycle stability, inhibiting surface passivation, and improving the activity of electrode materials

Pending Publication Date: 2021-06-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MoS, which is currently the main research object of cathode lithium intercalation materials 2 The conductivity and structural stability of the base material are poor, and the pure magnesium and magnesium alloys used as negative electrode materials are easily passivated during charge and discharge, resulting in low activity of the negative electrode material, making the electrochemical performance of the magnesium-lithium double-salt battery insufficient to meet the current requirements. Power Battery Requirements
At the same time, the commonly used metal current collectors, copper foil and aluminum foil, have poor corrosion resistance. Partial discharge products or electrolytes generated during battery charging and discharging will etch the metal current collector, thereby reducing battery performance.

Method used

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  • Flexible positive and negative electrode material for high-performance magnesium-lithium double-salt ion battery and preparation method thereof
  • Flexible positive and negative electrode material for high-performance magnesium-lithium double-salt ion battery and preparation method thereof
  • Flexible positive and negative electrode material for high-performance magnesium-lithium double-salt ion battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A method for preparing a flexible electrode composite material for a magnesium-lithium double-salt battery, comprising the following steps;

[0038] Preparation of flexible cathode materials for magnesium-lithium double-salt batteries:

[0039] Step 1, carbon cloth pretreatment:

[0040] 1) First, soak 0.7g of carbon cloth in acetone and sonicate for 10min.

[0041] 2) Next, soak the carbon cloth with dilute sulfuric acid for 20 minutes

[0042] 3) Finally, the carbon cloth soaked in dilute sulfuric acid was washed with ethanol and deionized water respectively, and then taken out and dried for later use.

[0043] Step 2, preparation of precursor solution:

[0044] Put 0.7g of sodium molybdate, 0.5g of hydroxylamine hydrochloride, 1.46g of thiourea, 0.068g of copper chloride and 0.018g of EG into a beaker, then add 40mL of deionized water, and stir with a glass rod to aid in dissolution. After dissolving, weigh 0.15 g of cetyltrimethylammonium bromide (CTAB) and add ...

Embodiment 2

[0055] A method for preparing a flexible electrode composite material for a magnesium-lithium double-salt battery, comprising the following steps;

[0056] Preparation of flexible cathode materials for magnesium-lithium double-salt batteries:

[0057] Step 1, carbon cloth pretreatment:

[0058] 1) First, soak 0.7g of carbon cloth in acetone for 20min and sonicate.

[0059] 2) Next, soak the carbon cloth with dilute sulfuric acid for 30 minutes

[0060] 3) Finally, the carbon cloth soaked in dilute sulfuric acid was washed with ethanol and deionized water respectively, and then taken out and dried for later use.

[0061] Step 2, preparation of precursor solution:

[0062] Put 0.88g of sodium molybdate, 0.725g of hydroxylamine hydrochloride, 1.52g of thiourea, 0.136g of copper chloride and 0.012g of EG into a beaker, then add 50mL of deionized water, and stir with a glass rod to aid in dissolution. After dissolving, 0.18 g of cetyltrimethylammonium bromide (CTAB) was weighed...

Embodiment 3

[0073] A method for preparing a flexible electrode composite material for a magnesium-lithium double-salt battery, comprising the following steps;

[0074] Preparation of flexible cathode materials for magnesium-lithium double-salt batteries:

[0075] Step 1, carbon cloth pretreatment:

[0076] 1) First, soak 0.7g of carbon cloth in acetone for 30min and sonicate.

[0077] 2) Next, soak the carbon cloth with dilute sulfuric acid for 40 minutes

[0078] 3) Finally, the carbon cloth soaked in dilute sulfuric acid was washed with ethanol and deionized water respectively, and then taken out and dried for later use.

[0079] Step 2, preparation of precursor solution:

[0080] Put 0.9g of sodium molybdate, 0.8g of hydroxylamine hydrochloride, 1.58g of thiourea, 0.204g of copper chloride and 0.006g of EG into a beaker, then add 60mL of deionized water, and stir with a glass rod to aid in dissolution. After dissolving, 0.2 g of cetyltrimethylammonium bromide (CTAB) was weighed and...

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Abstract

The invention discloses a flexible positive and negative electrode material for a high-performance magnesium-lithium double-salt ion battery and a preparation method thereof. The flexible positiveand negative electrode material comprises a flexible positive electrode material and a negative electrode material, the flexible positive electrode material comprises carbon cloth, the composite material is xMoS2-yCuS-zEG, the value range of x is 70%-90%, the value range of y is 5%-15%, the value range of z is 5%-15%,MoS2, CuS and EG are synthesized through in-situ growth of a one-step hydrothermal method, meanwhile, a carbon cloth current collector is added in the hydrothermal process, the composite material can be uniformly and tightly loaded on the carbon cloth, the negative electrode material is a film formed by mixing and spin-coating nano Mg prepared by a liquid phase reduction method and PEDOT:PSS, the content of the nano Mg is 50%, and the film formed by the nano Mg and the PEDOT:PSS has ultrahigh conductivity, and the conductivity and the structural stability of a magnesium-lithium double-salt battery electrode material are obviously enhanced.

Description

technical field [0001] The invention relates to the technical field of secondary batteries, in particular to a flexible positive and negative electrode material for a high-performance magnesium-lithium double-salt ion battery and a preparation method thereof. Background technique [0002] The most common ion battery in the current battery market is the lithium-ion battery, which has high energy density, good dynamic performance, no memory effect, many cycles, and is environmentally friendly. Since its birth, it has been favored by researchers and the consumer market. favor. However, with the development of lithium-ion batteries, its disadvantages are gradually revealed. Lithium dendrites are easy to form during charging and discharging, resulting in low safety and reliability of lithium-ion batteries, requiring complex protection circuits. More importantly, the low reserves of lithium on the earth lead to its high price, which is also an important factor restricting the ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/38H01M4/58H01M10/0525H01M10/054
CPCH01M4/625H01M4/628H01M4/5815H01M4/624H01M4/381H01M10/0525H01M10/054Y02E60/10
Inventor 侯小江石洪昌张娜杨璐侯凯铭舒强张书伟王天泽锁国权冯雷叶晓慧杨艳玲
Owner SHAANXI UNIV OF SCI & TECH
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