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Water-based zinc ion secondary battery and preparation method of positive electrode based on organic electrode material thereof

A secondary battery and organic electrode technology, which is applied in the field of electrochemical energy storage devices, can solve the problems of narrow voltage window and poor cycle performance of polyaniline, and achieve the effects of obvious voltage platform, improved mass loading and low cost

Active Publication Date: 2019-08-27
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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  • Water-based zinc ion secondary battery and preparation method of positive electrode based on organic electrode material thereof
  • Water-based zinc ion secondary battery and preparation method of positive electrode based on organic electrode material thereof
  • Water-based zinc ion secondary battery and preparation method of positive electrode based on organic electrode material thereof

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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 a water-based rechargeable zinc ion battery based on an organic electrode material, and belongs to the field of secondary batteries. A device comprises a zinc metal negative electrode, a diaphragm and a positive electrode based on a polymer. An electrolyte is a zinc sulfate aqueous solution. The positive electrode of the device is mainly a polymer electrode material attached to porous activated carbon, and plays a decisive effect on the energy storage capacity, the voltage window and the electrochemical behavior. The organic electrode material disclosed by the invention shows relatively high specific capacitance and excellent cycling performance. The organic electrode material and the activated carbon are combined, so that the electrode has the characteristic of high mass carrying capacity. The unit area capacity of the prepared device is in the level of F / cm2 or mAh / cm2. The maximum voltage of the device is between 1.6V and 1.9V, depending on the choice of thepolymer electrode. The polymer / porous activated carbon composite material electrode disclosed by the invention can be used for preparing the water-based zinc ion secondary battery with high energy density and long cycle life.

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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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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