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Aluminum ion battery

An aluminum-ion battery, battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of difficulty in obtaining and high purchase cost, and achieve the effects of low cost, high thermal stability, and high practical application value.

Inactive Publication Date: 2017-11-07
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used imidazole-based ionic liquids are difficult to obtain, and the purchase cost is high. Although there is room for improving battery performance, there are few reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Triethylamine hydrochloride and aluminum chloride were mixed according to molar ratio 1:1.5, and stirred for 12 hours to obtain ionic liquid as the electrolyte of aluminum ion battery; thermogravimetric analysis results were as follows: figure 2 As shown, the temperature is higher than 220 ° C, the decomposition is obvious, and the thermal stability is high.

[0027] (2) Add 4mg ml -1 The graphene oxide solution is dropped onto the mold and freeze-dried at -10°C and 0.1kpa air pressure to obtain graphene oxide gas foam;

[0028] (3) chemical reduction at 90°C under hydrazine hydrate vapor for 24 hours to obtain graphene foam;

[0029] (4) Use a graphitization furnace to heat at 3000°C under an argon atmosphere, and reduce the graphene gas foam to obtain a defect-free ultra-high conductive graphene foam;

[0030] (5) Take by weighing 0.8 mg of the weight of the graphene foam, dry it in a vacuum at 130° C. for 24 hours, and use it as the positive electrode of the a...

Embodiment 2

[0034] Dissolve triethylamine hydrochloride in aluminum chloride according to the molar proportion shown in table 1, stir 12 hours, obtain ionic liquid, as the electrolytic solution of aluminum-ion battery; Show that proportioning is greater than or equal to 1.4 time ionic liquid by experimental result The liquid is a light yellow transparent liquid, which can be used as an electrolyte; when it is less than 1.4, the ionic liquid is gel-like, and the viscosity is too high, so it cannot be used as an electrolyte.

[0035] Then use different ratios of ionic liquids as electrolytes, graphene foam as positive electrodes, and aluminum foil as negative electrodes to obtain aluminum-ion batteries.

[0036] Table 1

[0037]

[0038] Note: The specific capacity is at a current density of 5A g -1 Measured below.

[0039] It can be seen from Table 1 that when the ratio is 1.4 to 1.6, the specific capacity is higher, the cycle life is longer, the Coulombic efficiency is stable and can...

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Abstract

The invention discloses an aluminum ion battery. Electrolyte is ionic liquid composed of triethylamine hydrochloride and aluminum chloride according to the mol ratio of 1 to (1.4 to 1.6); a positive electrode is a graphene foam positive electrode material. According to the aluminum ion battery disclosed by the invention, mostly, triethylamine hydrochloride used in the aluminum ion battery is an industrial waste material, is easy to obtain and low in cost, so that the triethylamine hydrochloride is an environment-friendly and cheap raw material. The power density and energy density of the aluminum ion battery are ensured, and the cut-off voltage and specific capacity of the battery are improved by utilizing the ionic liquid; meanwhile, the efficiency is ensured, so that the safety and energy storage performance of the battery are improved.

Description

technical field [0001] The invention relates to the field of high-performance batteries, in particular to an aluminum ion battery. Background technique [0002] Aluminum-ion batteries have become very promising next-generation energy storage methods due to the advantages of ultra-high specific capacity, low cost, and safety of aluminum metal anodes. The electrolyte in the battery plays an important role in the battery cycle life and safety. At present, the chemical window of the aluminum ion battery with graphene foam as the positive electrode and imidazole ionic liquid as the electrolyte is 0.7-2.45V, and the specific capacity is 70mAh g -1 , the Coulombic efficiency is 97–98%, the cycle life is about 7000 cycles, and the three-electron redox theoretical specific capacity of aluminum metal is 2980mAh g -1 , the ideal Coulombic efficiency of the battery can reach 99.98%. More importantly, the high price of imidazole ionic liquids limits its industrial development. Theref...

Claims

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Application Information

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IPC IPC(8): H01M10/054H01M10/0568H01M4/583
CPCH01M4/583H01M10/054H01M10/0568Y02E60/10
Inventor 高超徐晗彦
Owner HANGZHOU GAOXI TECH CO LTD
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