Supercapacitors

A cheap and easy way to make "crumpled" graphene may benefit electronics and energy devices

Researchers at the University of Illinois designed a single-step method of creating textures in graphene ("crumpling") to allow for larger surface areas, thus tapping into graphene's benefits for electronics. The scientists believe that "crumpled" graphene may also be used as high surface area electrodes for batteries and supercapacitors. As a coating layer, the 3D graphene could allow omniphobic/anti-bacterial surfaces for advanced coating applications.

Illonois University discovers novel way to make crumpled graphene image

The "crumpling" process is based on a known shape-memory polymer substrate (a material capable of returning to its original shape after being distorted, mostly by thermal means). The thermoplastic nature of the substrate also allows for the “crumpled” graphene morphology to be arbitrarily re-flattened at the same elevated temperature for the “crumpling” process. 

Sunvault Energy signs agreement with Edison Power Company to enter Alberta electricity market

Sunvault-logoSunvault Energy announced signing a letter of intent with U.S-based Edison Power Company to retail power within de-regulated power markets. The first market as part of the roll out strategy is planned to be the Alberta market, followed by other similar markets and markets that have time of use pricing.

Sunvault will be working closely with Edison to launch a new power retail program that will be unique in its approach and will benefit Alberta consumers greatly. Sunvault will work through its incubation company, Aboriginal Power Corp, for power sales within First Nations territories. Sunvault aims to supply Alberta with "green" energy using its graphene supercapacitor technology and e future to spread out to aditional areas. The company's services are planned to cost less than existing market providers, while offering the same kind of Green benefit to consumers.

Sunvault's graphene-based supercapacitor declared to someday replace Lithium-ion batteries and compete with Tesla's battery aspirations

Sunvault-logoRepresentatives of The Canadian Sunvault recently attended the Wall Street Conference in Florida where they presented a 1000 farad graphene supercapacitor. This is claimed by the company to be the largest graphene supercapacitor developed to date and a technology that will in the future compete with, if not potentially replace, the lithium battery. 

The company's CEO was also quoted at the conference: "Currently the cost to manufacture a lithium battery is about $500 (USD) per/ kWh. Tesla recently announced a Super Factory to be built in Nevada, with a promise to get the price of lithium batteries down to $150 USD per kWh by 2020, our current cost estimated for this type of graphene base supercapacitor is about $100 per kWh today and we feel confident we should be able to cut this pricing in half by the end of 2015".

UCLA scientists combine graphene with manganese oxide to create innovative supercapacitors

Researchers at UCLA’s California NanoSystems Institute have successfully combined laser-scribed graphene and manganese dioxide (which is currently used in alkaline batteries since it holds a lot of charge and is cheap and abundant) to create a new energy storage device with outstanding qualities. The new hybrid supercapacitor stores large amounts of energy, recharges quickly, and can last for more than 10,000 recharge cycles.

hybrid-supercapacitor-ucla-image

The scientists also created a microsupercapacitor that is small enough to fit in wearable or implantable devices. At just a fifth of the thickness of a sheet of paper, it can hold more than twice as much charge as a typical thin-film lithium battery. 

Sunvault to develop graphene-based supercapacitors for PV cells

Sunvault-logoCanadian Sunvault Energy has formed the Supervault Energy JV to develop UCLA-patented graphene supercapacitor technology. It announced its plans to soon enter a joint venture which "change the face of renewable energy generation and storage". 

The company states that graphene will enable devices that recharge in seconds and that supercapacitors could be scaled up from portable devices, such as smartphones, to charging stations for electric vehicles. The company says that the technology can be scaled up to utility-sized applications and that it intends to incorporate the technology in its solar cells to produce a device capable of generating, transferring and storing energy in one unit.

Laser annealing may improve graphene inks

German scientists at the University of Siegen, along with scientists from the KTH-Royal Institute of Technology in Kista, Sweden, claim that laser annealing can improve the quality of printed graphene (and other 2D materials) inks. This can be beneficial for various applications like flexible electronics devices, including batteries and supercapacitors, transistors, solar cells and displays.

laser annealing improves graphene inks image 

The researchers succeeded in producing uniform, transparent and conductive graphene thin films by simply drop-casting dispersions of the carbon sheet onto a glass surface and combining this drop-casting step with laser annealing. The annealing process involves scanning a laser beam across the surface of the films, which distinctly improves their transparency and how well they conduct electricity. 

Graphene ESD and Stony Brook University sign a research agreement for development of a graphene-based supercapacitor

Graphene ESD logoLomiko Metals recently announced forming a new graphene-related venture called Graphene Energy Storage Devices (Graphene ESD Corp.) to commercialize their energy storage technology. Now, Lomiko has announced the signing of a research agreement between Graphene ESD and Stony Brook University.

Graphene ESD Corp. will partner with the SBU Center for Advanced Sensor Technologies (Sensor CAT) to develop new supercapacitors designed for energy storage. The device will be designed as a versatile energy storage solution for electronics, electric vehicles and electric grid. SBU will leverage its experience in electrochemistry and will be responsible for the design of the electrode and the electrolyte formulation. The Graphene ESD team will work on device assembly and testing.

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