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A dual-ion battery using a ternary composite material as a negative electrode and a preparation method thereof

A composite material and dual-ion technology, applied in the field of electrochemical energy storage, can solve the problems of low theoretical specific capacity and poor rate performance, and achieve the effects of simple synthesis process, improved rate performance, and improved cycle stability performance.

Active Publication Date: 2020-07-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon materials have good electronic conductivity, and the volume change is small when metal ions are deintercalated. It is an ideal stable carrier. It also has the advantages of low price and environmental protection. However, the theoretical specific capacity is relatively low and the rate performance is poor.

Method used

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  • A dual-ion battery using a ternary composite material as a negative electrode and a preparation method thereof
  • A dual-ion battery using a ternary composite material as a negative electrode and a preparation method thereof
  • A dual-ion battery using a ternary composite material as a negative electrode and a preparation method thereof

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Effect test

Embodiment 1

[0025] Embodiment 1: Preparation method of sodium double-ion battery

[0026] Dissolve antimony trichloride, citric acid and cyanamide in sequence into a certain amount of graphene oxide suspension solution, then perform dehydration treatment to obtain a high-temperature carbonized precursor, and finally, in a tube furnace protected by an argon atmosphere at 700 ° C Carbonization treatment at high temperature for 40 minutes to obtain metal antimony / carbon / graphene ternary composite negative electrode.

[0027] A sodium double-ion battery was fabricated in a glove box, in which the positive electrode was commercial expanded graphite, the negative electrode was metal antimony / carbon / graphene ternary composite negative electrode, and the electrolyte was 1M sodium perchlorate (NaClO 4 ), and the diaphragm is a commercially available diaphragm. The voltage of the dual-ion battery is 2V-4.7V.

[0028] The metal antimony / carbon / graphene ternary composite negative electrode is ident...

Embodiment 2

[0030] Embodiment 2: preparation method of potassium double-ion battery

[0031] Dissolve tin tetrachloride, tartaric acid and melamine into a certain amount of graphene oxide suspension solution in sequence, then perform dehydration treatment to obtain a high-temperature carbonized precursor, and finally, carbonize at a high temperature of 900°C in a tube furnace protected by an argon atmosphere After processing for 50 minutes, a metal tin / carbon / graphene ternary composite negative electrode was obtained.

[0032] A potassium double-ion battery was fabricated in a glove box, wherein the positive electrode was commercial expanded graphite, the negative electrode was a metal tin / carbon / graphene ternary composite negative electrode, and the electrolyte was 1M potassium perchlorate (KClO 4 ), and the diaphragm is a commercially available diaphragm. The voltage of the dual-ion battery is 2V-5V.

Embodiment 3

[0033]Embodiment 3: Lithium double-ion battery preparation method

[0034] Dissolve zinc chloride, gluconic acid and cyanamide into a certain amount of graphene oxide suspension solution in sequence, and then perform dehydration treatment to obtain a high-temperature carbonized precursor. Lower carbonization treatment for 20 minutes to obtain metal zinc / carbon / graphene ternary composite negative electrode.

[0035] A lithium double-ion battery was fabricated in a glove box, in which the positive electrode was commercial expanded graphite, the negative electrode was a metal zinc / carbon / graphene ternary composite negative electrode, and the electrolyte was 1M lithium perchlorate (LiClO 4 ), and the diaphragm is a commercially available diaphragm. The voltage of the dual-ion battery is 3V-5V.

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Abstract

The invention relates to a dual-ion battery using a ternary composite material as a negative electrode and a preparation method thereof. A metal / carbon / graphene ternary composite material is prepared by a one-step high-temperature carbothermal reduction method. The metal / carbon / graphene ternary The composite material is used as the negative electrode, the graphite material is used as the positive electrode and the metal salt electrolyte is assembled into a dual-ion battery. The preparation method of the invention is simple, environmentally friendly, simple and easy to obtain raw materials, good cycle performance under high current, and high coulombic efficiency.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, in particular to a dual-ion battery using a ternary composite material as a negative electrode and a preparation method thereof, and in particular to a dual-ion battery using a metal / carbon / graphene ternary composite material as a negative electrode. Ion battery and its preparation method. Background technique [0002] Lithium-ion batteries have outstanding advantages such as high specific energy density, long cycle life, little environmental pollution and no memory effect, and have achieved great success in the electronic field. However, the reserves of lithium metal in the earth's crust are low and unevenly distributed, which makes the production cost of lithium-ion batteries high. Therefore, it is urgent to develop energy storage technologies with excellent performance, abundant resources, and low prices. Among them, the emerging dual-ion battery in recent years is one of them. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/054H01M4/36H01M4/38H01M4/62H01M10/058
CPCH01M4/362H01M4/38H01M4/625H01M10/054H01M10/058H01M2220/20Y02E60/10Y02P70/50
Inventor 曲晋王真真于中振常伟郝舒萌
Owner BEIJING UNIV OF CHEM TECH
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