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Chargeable and dischargeable aqueous aluminum ion battery and preparation process thereof

An aluminum ion battery, charging and discharging technology, applied in the direction of battery electrodes, secondary batteries, circuits, etc., can solve the problems of complex structure and impracticality, and achieve good conductivity, excellent chemical stability, and low pollution effects

Active Publication Date: 2019-07-12
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This three-electrode battery device is not practical due to its complex structure.

Method used

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  • Chargeable and dischargeable aqueous aluminum ion battery and preparation process thereof
  • Chargeable and dischargeable aqueous aluminum ion battery and preparation process thereof
  • Chargeable and dischargeable aqueous aluminum ion battery and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of battery positive electrode: 0.3M Mn(NO 3 ) 2 The solution was added to 0.6M NaOH and 2M H 2 o 2 solution, after stirring for 0.5h, add 2M NaOH, put the mixture into the reaction kettle, and react at 150°C for 16h to obtain the Na of birnessite 0.55 mn 2 o 4 1.5H 2 O. Mix this birnessite sodium manganate material with Super P conductive agent and polyvinylidene fluoride (PVDF) binder in N-methylpyrrolidone at a mass ratio of 70:20:10 to make a slurry, and coat it on stainless steel On the sheet, dry in a vacuum oven for 10h to make an electrode sheet.

[0024] Electrolyte preparation: Weigh 0.95 g of aluminum trifluoromethanesulfonate powder in a glove box and place it in a reagent bottle, add 1 mL of deionized water, stir for 12 hours, and prepare a 2M aluminum trifluoromethanesulfonate electrolyte.

[0025] Preparation of aluminum negative electrode: mix aluminum chloride and ionic liquid according to the preferred molar ratio of 1.3:1, and let s...

Embodiment 2

[0028] Others are as in Example 1.

[0029] Metal aluminum is directly used as the negative electrode of the battery without immersion in ionic liquid.

[0030] Battery at 50mAg -1 Charge and discharge at constant current, the charge and discharge voltage range is 0.5–1.8V, and the discharge specific capacity is 365mAh g -1 , The average discharge voltage is 1.08V, and it can be charged and discharged more than 3 times.

Embodiment 3

[0032]Others are as in Example 1.

[0033] With 5M aluminum trifluoromethanesulfonate aqueous solution as the electrolyte, the battery operates at 50mA g -1 Charge and discharge at a constant current, the charge and discharge voltage range is 0.5–1.7V, and the discharge specific capacity is 137mAh g -1 , the average discharge voltage is 1.38V, and the remaining specific capacity is 64mAh g after 10 charge-discharge cycles -1 .

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Abstract

The invention relates to a chargeable and dischargeable aqueous aluminum ion battery and a preparation process thereof, belonging to the technical field of batteries. The aqueous aluminum ion batterymainly comprises a cathode, an anode, an electrolyte and a diaphragm, wherein the cathode material is birnessite manganate, the anode is metal aluminum and alloy thereof, the electrolyte is an aluminum trifluoromethanesulfonate aqueous solution, and the cathode, the anode, the electrolyte and the diaphragm form a primary battery system. The interlayer spacing of the birnessite manganate MxMnOy.nH2O (M is a metal cation) is about 0.72nm, and lattice water exists between the layers. The secondary aluminum ion battery is high in capacity (530mAhg<-1>, relative to the birnessite manganate), is proper in discharge potential platform (1.0-1.4V vs. A13+ / Al), is very good in the corresponding cathode capacity density (530-740Wh g<-1>), is wide in material source, easy to prepare, simple to assemble, low in cost and green and environmental.

Description

technical field [0001] The invention relates to a water-based aluminum ion battery using birnessite manganate as a positive electrode material, and belongs to the technical field of batteries. Background technique [0002] Lithium-ion batteries have been widely used in electronic products, power energy, military fields, etc. since their inception. At present, rechargeable batteries are still dominated by lithium-ion batteries. However, the scarcity of lithium resources, high cost, and high safety hazards limit the further development of lithium-ion batteries. From the perspective of negative electrodes, aluminum-ion batteries have become one of the next-generation energy storage methods due to the advantages of high specific capacity, low cost, and high safety of aluminum metal negative electrodes. At present, aluminum-ion batteries mainly use room-temperature ionic liquids based on chloroaluminum salts as electrolytes, but ionic liquids are expensive and have certain safe...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M10/36H01M4/46H01M4/38
CPCH01M4/131H01M4/1391H01M4/505H01M10/054H01M10/0568H01M2004/028H01M2300/0025Y02E60/10
Inventor 尉海军何世满张旭王洁楚维钦刘世奇
Owner BEIJING UNIV OF TECH
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