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Improved supercapacitors for better batteries, electric vehicles

Improved supercapacitors for better batteries, electric vehicles | Science, Technology, and Current Futurism | Scoop.it

Researchers at the University of California, Riverside have developed a new graphene-based nanoscale architecture that improves the performance of supercapacitors, a development that could mean faster acceleration in electric vehicles and longer battery life in portable electronics.

 

A supercapacitor is an energy storage device like a battery. The new design is based on ruthenium oxide anchored on a graphene foam electrode. It could deliver two times more energy and power compared to supercapacitors commercially available today.

 

The foam electrode was successfully cycled over 8,000 times with no fading in performance. The findings were outlined in the journal Nature Scientific Reports (open access).

 

Supercapacitors (also known as ultracapacitors) have ultra-high charge and discharge rate, excellent stability, long cycle life, and very high power density.

 

To achieve a higher power density, it is critical to have a large electrochemically accessible surface area, high electrical conductivity, short ion diffusion pathways, and excellent interfacial integrity, which are achieved by the new architecture.

 

These characteristics are desirable for many applications including electric vehicles and portable electronics. However, supercapacitors may only serve as standalone power sources in systems that require power delivery for less than 10 seconds because of their relatively low specific energy. Higher capacitance, or the ability to store an electrical charge, is critical to achieve higher energy density. This is also enabled by the new architecture.


Via Dr. Stefan Gruenwald
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Electronics Weekly News | Research | 3D graphene for super-capacitors

Electronics Weekly News | Research | 3D graphene for super-capacitors | Science, Technology, and Current Futurism | Scoop.it
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Stacking 2-D materials produces surprising results - MIT News Office

Stacking 2-D materials produces surprising results - MIT News Office | Science, Technology, and Current Futurism | Scoop.it
New experiments reveal previously unseen effects, could lead to new kinds of electronics and optical devices.
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"The MIT team also observed an interesting new physical phenomenon. When exposed to a magnetic field, the material exhibits fractal properties — known as a Hofstadter butterfly energy spectrum — that were described decades ago by theorists, but thought impossible in the real world. There is intense research in this area; two other research groups also report on these Hofstadter butterfly effects this week in the journal Nature."

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33rd Square: Inexpensive One-Atom-Thick Graphene Supercapcitors Created

33rd Square: Inexpensive One-Atom-Thick Graphene Supercapcitors Created | Science, Technology, and Current Futurism | Scoop.it
UCLA researchers have developed a groundbreaking technique that uses a DVD burner to fabricate micro-scale graphene-based supercapacitors — devices that can charge and discharge a hundred to a thousand times faster than standard batteries.
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New wonder material replaces graphene for future electronic devices | KurzweilAI

New wonder material replaces graphene for future electronic devices | KurzweilAI | Science, Technology, and Current Futurism | Scoop.it
This diagram shows the flat-sheet structure of molybdenum disulfide --- molybdenum atoms shown in teal, sulfur atoms in yellow (credit:  Han Wang et...
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Samsung claims a graphene breakthough — which may be huge for future wearables

Samsung claims a graphene breakthough — which may be huge for future wearables | Science, Technology, and Current Futurism | Scoop.it
Above: Samsung's Gear FitImage Credit: Devindra Hardawar/VentureBeatHow can big data and smart analytics tools ignite growth for your company? Find out at DataBeat, May 19-20 in San Francisco. There are only 10 tickets left at the lowest rate!
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Huge Grains of Copper Promote Better Graphene Growth

Huge Grains of Copper Promote Better Graphene Growth | Science, Technology, and Current Futurism | Scoop.it

To technology insiders, graphene is a certified big deal. The one-atom thick carbon-based material elicits rhapsodic descriptions as the strongest, thinnest material known. It also is light, flexible, and able to conduct electricity as well as copper. Graphene-based electronics promise advances such as faster internet speeds, cheaper solar cells, novel sensors, space suits spun from graphene yarn, and more.

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33rd Square: Researchers Find Theoretic Strongest Material Ever

33rd Square: Researchers Find Theoretic Strongest Material Ever | Science, Technology, and Current Futurism | Scoop.it
Nanoropes or nanorods of carbyne, a chain of carbon atoms, would be stronger than graphene or even diamond if they can be manufactured, according to new calculations by Rice University.
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Graphene And The EmergingTechnology of Neural Prostheses | MIT Technology Review

Graphene And The EmergingTechnology of Neural Prostheses | MIT Technology Review | Science, Technology, and Current Futurism | Scoop.it
Neural implants are set to be revolutionised by a new type of graphene transistor with a liquid gate, say bio-engineers
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