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Preparation method of aqueous aluminium ion battery cathode, and aqueous aluminium ion battery

A technology of aluminum ion battery and negative electrode, which is applied in the direction of electrode manufacturing, battery electrode, electrode collector coating, etc., to achieve the effects of stable structure, avoiding low cycle stability and excellent cycle performance

Inactive Publication Date: 2019-03-29
YINLONG ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there are no patents and literature reports on Na 2 V 6 o 16 As the negative electrode of aqueous aluminum ion battery

Method used

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  • Preparation method of aqueous aluminium ion battery cathode, and aqueous aluminium ion battery
  • Preparation method of aqueous aluminium ion battery cathode, and aqueous aluminium ion battery
  • Preparation method of aqueous aluminium ion battery cathode, and aqueous aluminium ion battery

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preparation example Construction

[0023] Embodiments of the present invention provide a method for preparing a negative electrode of an aqueous aluminum ion battery, which includes:

[0024] Na 2 V 6 o 16 ·3H 2 O the negative electrode material is mixed with a conductive agent and a binder according to a preset ratio to obtain a mixture;

[0025] Add deionized water to the mixture and stir to form a homogeneous slurry;

[0026] The slurry is coated on the current collector and dry roll die cut.

[0027] Further, in a preferred embodiment of the present invention, Na 2 V 6 o 16 ·3H 2 O The negative electrode material is mixed with the conductive agent and the binder according to a preset ratio of 8:1:1. Of course, in other embodiments of the present invention, the amount of negative electrode material, conductive agent and binder can also be selected according to requirements, which are not limited in this embodiment of the present invention.

[0028] Further, in a preferred embodiment of the present ...

Embodiment 1

[0045] This embodiment provides a method for preparing a negative electrode of an aqueous aluminum ion battery, which includes:

[0046]S1: At room temperature, 0.546gV 2 o 5 and 0.142gNa 2 SO 4 Dissolve in 30ml of distilled water and stir for 1 hour to obtain a mixed solution;

[0047] S2: The mixed solution was transferred to a 50ml Teflon-lined stainless steel autoclave, and hydrothermally reacted at 180°C for 24h, and then cooled to room temperature to obtain the first product;

[0048] S3: alternately washing the red-brown product three times with distilled water and absolute ethanol for the first product and centrifuging to obtain the washed second product;

[0049] S4: the washed second product is placed in a vacuum oven at 60°C for 12 hours to obtain Na 2 V 6 o 16 ·3H 2 O anode material;

[0050] S5: Prepared Na 2 V 6 o 16 ·3H 2 O negative electrode material is mixed with conductive agent, binding agent according to mass ratio 8:1:1 to obtain mixture;

[...

experiment example 1

[0054] The XRD spectrum of the negative electrode material that embodiment 1 prepares is as figure 1 As shown, with silver-silver chloride as the reference electrode, graphite rod electrode For the counter electrode, the electrolyte is 1mol L -1 Al(NO 3 ) 3 aqueous solution, and the electrochemical performance test of the prepared negative electrode was carried out.

[0055] Such as figure 2 As shown, Na 2 V 6 o 16 ·3H 2 The first discharge specific capacity of O is 54.8F / g. After 100 cycles, the specific capacity remains basically unchanged. After 1700 cycles, the discharge specific capacity is 54.1F / g, the capacity retention rate is 98.7%, and the cycle stability is high.

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Abstract

The invention discloses a preparation method of a aqueous aluminium ion battery cathode, and an aqueous aluminium ion battery, and relates to the high specific energy battery field. The preparation method of a aqueous aluminium ion battery cathode includes the steps: mixing a Na2V6O16 3H2O anode material with a conductive agent and a binder in a predetermined ratio to obtain a mixture; dropping deionized water in the mixture and stirring to form a uniform slurry; and applying the slurry to a current collector, and performing drying, rolling, and punching. The preparation method of a aqueous aluminium ion battery cathode is simple and feasible, is low in cost, and can effectively avoid the safety problem, the high cost problem and the strict assembly adjustment problem of an organic lithiumion battery, and can also avoid the problem that the cycle stability is low because of the structural change in the charging and discharging process of the aqueous aluminum ion battery cathode in theprior art. And the prepared aqueous aluminium ion battery has the advantages of stable structure, excellent cycle performance, and low cost.

Description

technical field [0001] The invention relates to the field of high specific energy batteries, and in particular to a method for preparing a negative electrode of an aqueous aluminum ion battery and the aqueous aluminum ion battery. Background technique [0002] In order to realize the sustainable development of human society and ecological environment, people began to look for abundant, renewable and pollution-free new energy to meet the development needs of human beings and the ecological environment. Lithium-ion batteries have the advantages of high voltage, high specific energy, high power, low self-discharge, low pollution, and no memory effect. They have been widely used in portable electronic devices and power vehicles. However, flammable gases produced by the decomposition of the electrolyte during charging can cause an explosion. Moreover, the organic electrolyte lithium-ion battery needs a dry and oxygen-free environment during the assembly process, which greatly in...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/58H01M10/36
CPCH01M4/0404H01M4/5825H01M10/36Y02E60/10
Inventor 王美春詹世英何海平李海军蔡惠群
Owner YINLONG ENERGY CO LTD
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