Almost from the moment graphene was first successfully synthesized back in 2004, researchers around the world have envisioned its use for the electrodes of supercapacitors.
Supercapacitors, or ultracapacitors, or for the more technically inclined, electrochemical double layer capacitors (EDLCs), are a kind of hybrid between a capacitor and electrochemical batteries, like lithium ion (Li-ion) batteries. They can deliver an enormous amount of power very quickly, a capability known as power density (the maximum amount of power that can be supplied per unit mass), like a capacitor. But unlike capacitors, they can store that power for longer, a capability known as energy density (the amount of energy stored per unit mass).
In order for supercapacitors to store more electricity to start approaching the energy density of an electrochemical battery you need to increase the surface area of the electrodes. It is here on the electrodes that the electrical charge is stored via something akin to static electricity. The more surface area you can give the electrodes, the more electricity can be stored in the supercapacitor.
While research continues to see if graphene can be used to produce the long charge times for supercapacitors so sought after by all-electric vehicle enthusiasts, graphene does have other properties that could prove to be very attractive for other applications. For one, its high electrical conductivity is significantly better than activated carbon, which could open up applications in electronics. It also can be made into a structure unlike activated carbon, which is just sort of lumped together. With its ability to be structured, graphene has another attractive property for electronic applications in which it could be designed into electronic components.
This report looks at the strengths and weaknesses of graphene in supercapacitor applications and how those stack up against established materials and other potential materials being experimented with for supercapacitor applications.
To accomplish this aim this report looks at how supercapacitors are currently produced, who produces them and who among those producers appear to taking the prospects of graphene seriously. We also look at graphene manufacturing and the methods are best suited for leading to a material for the electrodes of supercapacitors.
TABLE OF CONTENTS
Profiles of Supercapacitor Manufacturers
Figure 1: Schematic of Supercapacitor Design
Table 1: Specific Energy Density Watt-hour/Kilogram (Wh/kg)
Table 2: Supercapacitors market--electrical applications
Table 3: Supercapacitors market--electronic applications
Figure 2: Breakdown of EDLC Capacitor Markets by Segment & Applications
Table 4: Summary of Graphene Manufacturing Techniques for Supercapacitors
Table 5: Plasma Graphene Companies
Table 6: Liquid Phase Exfoliation Companies
Table 7: Oxidation Reduction Companies
Table 8: CVD Graphene Companies
Figure 3: Types of Products Supercapacitor Suppliers Manufacture
Table 9: Leading Suppliers of Supercapacitors Related to Graphene
Table 10: Full List of Supercapacitor Suppliers
Advanced Capacitor Technologies
Angstron Materials LLC
Applied Graphene Materials
Baoding Yepu New Energy
Beijing HCC Energy Tech
Bluestone Global Tech
Catalyx Nanotech Inc. (CNI)
Chaoyang Liyuan New Energy
Daying Juneng Technology and Development
Dongguan Amazing Electronic
Dongguan Fuhui Electronics Sales
Dongguan Gonghe Electronics
East Penn Manufacturing Co.
Evans Capacitor Company
Furukawa Battery Co
Graphene Energy Inc
Graphene Laboratories Inc.
Harbin Jurong Newpower
Haydale Graphene Industries plc
JM Energy Corp
Lomiko Metals Inc.
Nanotecture (now only licensing)
Nesscap Energy Inc
Paper Battery Company
Shanghai Aowei Technology Development
Shanghai Green Tech
Shenzhen Forecon Super Capacitor Technology
Sino Power Star
University of Cambridge
Vina Technology Co
WIMA Spezialvertrieb Elektronischer Bauelemente