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Self-power-generation and long-service-life Zn-CoNC zinc-air battery and application thereof

A zinc-air battery, long-life technology, applied in the field of electrochemical energy storage batteries, can solve the problems of the lack of commercialization and application of zinc-air batteries, the difficulty of battery design and electrode technology, and the decline of battery output capacity, so as to increase performance, improve The effect of continuous use time and stability improvement

Active Publication Date: 2019-03-01
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of water and carbon dioxide, the output capacity of the battery is reduced and the capacity is attenuated
In addition, the openness of zinc-air batteries also brings certain difficulties to battery sealing, which must be solved for the commercialization of zinc-air batteries.
In addition, due to its open structure, the battery design and electrode process are particularly difficult, so zinc-air batteries have not yet been widely commercialized and applied.

Method used

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  • Self-power-generation and long-service-life Zn-CoNC zinc-air battery and application thereof
  • Self-power-generation and long-service-life Zn-CoNC zinc-air battery and application thereof
  • Self-power-generation and long-service-life Zn-CoNC zinc-air battery and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The synthesis of Zn / Co-ZIF cathode material on flexible carbon cloth was achieved by a hydrothermal method. Using a commercial carbon cloth (2cm×3cm) after ultrasonic treatment in absolute ethanol for 10 minutes as a flexible substrate, add 1mmol zinc nitrate and 4mmol cobalt nitrate to 80mL methanol solution, and add 3.7g methylimidazole to 80mL methanol solution , the two are mixed as a hydrothermal solution, the hydrothermal temperature is 120 ° C, and the time is 2 hours. Al 2 o 3 The layer is obtained by ALD atomic layer deposition, the precursor source is trimethylaluminum (TMA) and water (H 2 O), the temperature is 60°C, the coating thickness: 20cycles.

[0028] Finally Zn / Co-ZIF@Al 2 o 3 in N 2 Annealing at 700°C for 1 to 2 hours under atmosphere to obtain CoNC@Al 2 o 3 nanomaterials;

[0029] The Zn anode material is a thinner commercial zinc sheet, which is polished smooth before use to ensure sufficient contact.

[0030] Performance test: for the pr...

Embodiment 2-10

[0032] The operation process of Examples 2-13 is the same as that of Example 1, except that the time for hydrothermally synthesizing Zn / Co-ZIF, the temperature for ALD deposition of alumina, and the thickness of its coating film.

[0033] The specific hydrothermal synthesis time, synthesis temperature, temperature and coating thickness of aluminum oxide deposited by ALD and the results of each embodiment are listed in Table 1.

[0034] Table 1. Time regulation of hydrothermal synthesis

[0035]

[0036] In summary, the oxygen evolution peak potential of the material properties obtained in Example 13 is 1.647V, and the measured peak potential, the smaller the peak potential (closer to zero), the better its performance, and this condition is the best condition.

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Abstract

The invention provides a self-power-generation and long-service-life Zn-CoNC zinc-air battery, wherein the cathode of the Zn-CoNC battery is a CoNC@Al2O3 nano-material and the anode of same is a commercial zinc sheet. The CoNC@Al2O3 nano-material is prepared by preparing hydrothermal treatment on a substrate to form Zn / Co-ZIF; and depositing Al2O3 onto the Zn / Co-ZIF nano-material through atomic layer deposition (ALD) to prepare Zn / Co-ZIF@Al2O3; finally, annealing the Zn / Co-ZIF@Al2O3 in a nitrogen atmosphere at a high temperature of 500-900 DEG C to obtain the CoNC@Al2O3 nano-material. In the method, firstly, the Zn / Co-ZIF is coated with a layer of high-stability conductive Al2O3 through the ALD, so that excellent ORR and OER performances are achieved, and cyclic stability of the Zn-CoNC battery is further enhanced; finally, the Zn-CoNC zinc-air batter being high in energy density, long in service life and having self-power generation and flexibility can be produced. The product has great application prospect in the field of energy storage.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage batteries, and more specifically relates to a self-generating, long-life Zn-CoNC zinc-air battery and its application. Background technique [0002] With the rapid growth of the world's population and the continuous development of human society, people's various demands for energy are increasing day by day. It is obvious that traditional fossil energy cannot meet the various demands of future society for energy in the long run. In addition, with the rapid development of electronic technology and the popularization of various portable electronic products, people's demand for chemical power supplies is constantly increasing, and their performance requirements are also constantly improving. However, a series of new green energy sources such as wind energy, solar energy, geothermal energy, and ocean energy often have the problem of uneven regional distribution, and usually need ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/42H01M4/86H01M4/88H01M4/90H01M12/08B82Y30/00
CPCB82Y30/00H01M4/42H01M4/8657H01M4/8673H01M4/8825H01M4/9041H01M4/9083H01M12/08Y02E60/10
Inventor 卢锡洪朱琳于明浩曾银香童叶翔
Owner SUN YAT SEN UNIV
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