A kind of preparation method of paper-based flexible planar supercapacitor

Abstract

The invention discloses a preparation method of a paper-based flexible planar supercapacitor, and belongs to the technical field of energy. The preparation method comprises the preparation steps of printing an interdigital electrode structure on a paper plane with a porous structure; next, obtaining a foldable interdigital electrode model by adopting a manual cutting or laser cutting method; folding the interdigital electrode model into a three-dimensional structure; coating the two surfaces of the three-dimensional interdigital electrode model with an electrode paste, and performing drying treatment; enabling the dried three-dimensional interdigital electrode structure to be recovered on the paper plane; and coating the two surfaces of the electrode with an electrolyte and performing drying. By adoption of the method, symmetrical and asymmetrical planar supercapacitors can be prepared; the preparation method is simple in process and low in cost; and the prepared supercapacitor is highin specific capacity, flexibility and cycle stability.

Description

technical field [0001] The invention relates to a method for preparing a paper-based flexible planar supercapacitor, which belongs to the technical field of energy. Background technique [0002] The development of wearable and portable smart electronic devices urgently needs matching energy storage and power supply devices. As a new type of energy storage device, flexible supercapacitors have the advantages of high power density, fast charge and discharge speed, long cycle life, high flexibility, and miniaturization, and are considered to be the preferred energy devices for portable and wearable electronic devices. Flexible supercapacitors require elastic substrate support. Compared with organic elastic substrates such as polydimethylsiloxane and polyimide, paper materials have significant advantages such as low cost, environmental friendliness, light weight, and good flexibility. At the same time, its rough surface can enhance the bonding between materials. The porous fib...

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Problems solved by technology

Zhaoyang Liu et al. (Advanced Materials 2016, 28, 2217) prepared a composite interdigitated electrode array composed of graphene and electrochemically active organic polymer PH1000 on a paper substrate by template-assisted spray printing method, and then added polyvinyl alcohol dropwise - Sulfuric acid electrolyte, which constitutes a planar supercapacitor; although the planar supercapacitor prepared by this method has a high specific capacitance, it needs the assistance of a hard template in the preparation process, and the template is prepared by traditional photolithography technology, which requires special equipment and complicated processes; in addition, The expensive PH1000 polymer material is added to the electrode, which further increases the preparation cost; and the electrode paste used for spray printing is easy to spread on the paper substrate, which will reduce the resolution of the interdigital electrode structure, thereby affecting the performance of the supercapacitor

Ruisheng Guo et al. (Adv. Funct. Mater. 2017, 1702394) prepared catalytic (NH 4 ) 2 PdCl 4 -Polyethylene glycol interdigitated array structure, then perform air plasma treatment on the array structure to remove the quaternary ammonium ions in the polymer, and then obtain the Ni interdigitated electrode array structure by electroless deposition-electrodeposition operation, and finally adopt the electrodeposition method in the Preparation of MnO on Ni interdigitated electrode array 2 Active materials; although this method suppresses the diffusion of the electrode solution on the paper base and obtains a miniaturized flexible planar supercapacitor with excellent performance, the whole preparation process involves pretreatment of cellulose paper, template-assisted screen printing, and plasma treatment. , electroless deposition, electrodeposition and a series of steps, the preparation process is complicated and the cost is high

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