A kind of water-based zinc ion secondary battery and its positive electrode preparation method based on organic electrode material

A secondary battery and zinc ion technology, which is applied in the direction of battery electrodes, secondary batteries, nanotechnology for materials and surface science, etc., can solve the problems of poor cycle performance and narrow voltage window of polyaniline, and improve the quality of the load. The effect of obvious quantity and voltage platform and simple preparation process

Active Publication Date: 2021-01-12
BEIHANG UNIV
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Problems solved by technology

Polyaniline has poor cycle performance and narrow voltage window

Method used

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  • A kind of water-based zinc ion secondary battery and its positive electrode preparation method based on organic electrode material
  • A kind of water-based zinc ion secondary battery and its positive electrode preparation method based on organic electrode material
  • A kind of water-based zinc ion secondary battery and its positive electrode preparation method based on organic electrode material

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Embodiment Construction

[0026] The present invention is described further below in conjunction with example, but the present invention is not limited to specific embodiment.

[0027] (1) The conductive carbon cloth was ultrasonically cleaned in dilute nitric acid with a concentration of 2M for 3 hours, and then it was washed repeatedly with deionized water until neutral. The carbon arrangement was dried in an oven at 60°C for 6 hours before use.

[0028] (2) The high specific area (2230mg / cm 2 ), porous activated carbon powder, polyvinylidene fluoride, and conductive acetylene black were dispersed in N-methylpyrrolidone (NMP) in a mass ratio of 8:1:1, and then made into magnetic stirring for 12 hours to obtain a uniform carbon powder slurry (10mg / mL).

[0029] (3) Evenly coat the carbon powder on the cleaned hydrophilic carbon cloth, and the carbon powder loading can be controlled at 1-15mg / cm 2 between. The slurry-coated carbon was then placed in an oven at 100°C for 12 hours to dry.

[0030] ...

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Abstract

The invention relates to an aqueous rechargeable zinc ion battery based on an organic electrode material, which belongs to the field of secondary batteries. The device consists of a zinc metal anode, separator, and polymer-based cathode. The electrolyte is an aqueous solution of zinc sulfate. The positive electrode of the device is mainly a polymer electrode material attached to porous activated carbon, which plays a decisive role in energy storage capacity, voltage window, and electrochemical behavior. The organic electrode material in the invention exhibits high specific capacitance and excellent cycle performance. Combining organic electrode materials with activated carbon enables electrodes to feature high-quality loading. The capacity per unit area of ​​the prepared device is in F / cm 2 or mAh / cm 2 level. The highest voltage for the device was between 1.6–1.9 V, depending on the choice of polymer electrodes. Aqueous zinc ion secondary batteries with high energy density and long cycle life can be prepared by using the polymer / porous activated carbon composite electrode proposed by the invention.

Description

technical field [0001] The invention relates to the selection and preparation of a water system zinc ion secondary battery and its positive electrode material, belonging to the field of electrochemical energy storage devices. In the present invention, the slurry based on porous activated carbon powder with high specific surface area is coated on conductive carbon cloth or carbon paper, and after drying, it is used as a substrate, and some special polymers are introduced by electrochemical polymerization deposition on it, and then Combined with zinc electrodes to build a rechargeable battery in water system. Porous activated carbon as a polymer carrier can highlight the high-quality loading capacity of cathode active materials; the reversible chemical reaction between the polymer and the ions in the electrolyte plays a key role in energy storage. Using water-based electrolyte, the voltage window can reach 1.9V, and the energy density per unit area is mAh / cm 2 Magnitude. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M4/1399H01M10/38B82Y30/00
CPCB82Y30/00H01M4/1399H01M4/366H01M4/608H01M4/625H01M10/38Y02E60/10Y02P70/50
Inventor 刘金章赵逸辛拓
Owner BEIHANG UNIV
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