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Composite electrode materials and their uses

A composite electrode and active material technology, applied in the direction of hybrid capacitor electrodes, can solve the problems of limiting the application of three-dimensional electrode structures, the capacitance of solid electrolytes to be studied, etc., to solve the problem of small electrode thickness, higher capacitance, and high energy storage density Effect

Active Publication Date: 2017-11-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sufficient penetration of solid electrolytes in thick 3D electrodes limits the application of 3D electrode structures in all-solid-state energy storage devices.
[0004] Therefore, capacitors based on solid electrolytes are to be studied

Method used

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  • Composite electrode materials and their uses
  • Composite electrode materials and their uses
  • Composite electrode materials and their uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] In this embodiment, activated carbon is used as the electrode active material, phosphoric acid is used as the ionic compound providing electrolyte anions and cations, and PVA (polyvinyl alcohol) is used as the ion-conducting matrix. The specific preparation process is as follows:

[0087] (1) A substrate layer is formed on a silicon wafer, and a silicon nitride film with a thickness of about 100 nanometers is deposited on the silicon wafer by a low pressure vapor deposition (LPCVD) method.

[0088] (2) Photolithography is carried out on the substrate layer, and then a Cr / Au metal current collecting layer is vapor-deposited thereon. The thickness of the current collecting layer is 100 nanometers, and then peeled off to remove the redundant metal layer;

[0089] (3) Utilize the photoresist SU-8 to directly realize the diaphragm layer with the interdigitated groove structure through the photolithography method in the micromachining technology, and the thickness of the diaph...

Embodiment 2

[0094] In this embodiment, graphene is used as the electrode active material, sulfuric acid is used as the ionic compound providing electrolyte anions and cations, and PEO (polyethylene oxide) is used as the ion-conducting matrix. The specific preparation process is as follows:

[0095] (1) A substrate layer is formed on a silicon wafer, and a silicon nitride film with a thickness of about 100 nanometers is deposited on the silicon wafer by a low-pressure vapor deposition (LPCVD) method;

[0096] (2) Photolithography is carried out on the substrate layer, and then a Cr / Au metal current collecting layer is vapor-deposited thereon. The thickness of the current collecting layer is 100 nanometers, and then peeled off to remove the redundant metal layer;

[0097] (3) Utilize the photoresist SU-8 to directly realize the diaphragm layer with the interdigitated groove structure through the photolithography method in the micromachining technology, and the thickness of the diaphragm laye...

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Abstract

The invention discloses a composite electrode material and its application, wherein the composite electrode material includes: a carbon-based active material; and a solid electrolyte material, the solid electrolyte material includes an ion-conducting matrix and an ionic compound for providing electrolyte anions and electrolyte cations . The composite electrode material directly mixes the carbon-based active material with the solid electrolyte material to form an ion conduction channel in the electrode, which saves the usual process of the electrolyte penetrating into the electrode to form an ion conduction channel for the electrode, and also avoids the solid The problem of small electrode thickness caused by electrolyte material is difficult to penetrate.

Description

technical field [0001] The present invention relates to the fields of micro-energy and micro-machining, in particular, to a composite electrode material and its application, and more specifically, to a composite electrode material, an electrode, a supercapacitor and a method for preparing a supercapacitor. Background technique [0002] Supercapacitor (Super-capacitor, Ultra-capacitor, Electrochemical capacitor) is a kind of electric energy storage device, which has much higher charge and discharge power and cycle life than secondary batteries. Its energy storage mechanism includes the electric double layer effect based on carbon materials and the pseudocapacitive effect based on metal oxides or conductive polymers. Micro-supercapacitors are often used as a supplement to micro-batteries to manage micro-energy, or as a power supply to power micro-systems. With the miniaturization and high integration of various electronic systems, micro energy storage devices need to obtain a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30
CPCY02E60/13
Inventor 王晓红蒲娟
Owner TSINGHUA UNIV
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