Graphene for energy use is emerging as an exciting topic of research, with breakthrough discoveries hitting the headlines every week.
Supercapacitors, the new paradigm for portable energy, are expected to replace traditional batteries in personal devices such as cellphones, laptop computers, tablets, and even electric vehicles. Supercapacitors can recharge and discharge in just seconds, but can hold enough energy to power a handheld device for several weeks. With supercapacitors, even electric cars could be charged at “electric stations” within a few minutes, with enough “gas” to drive around the whole day. Graphene supercapacitors have existed in research labs for only two years, but the progress has been tremendous.
The recently developed process to make graphene supercapacitors, which is economical and industrially scalable, starts from the widely available graphene oxide. Although the aforementioned development is awesome, a most recent one is a serious competitor in the world of graphene supercapacitors. The recent work radically departs from all known supercapacitors, by using technology’s favorite material – silicon – as the active energy-storing material.
Instead of storing energy in chemical reactions the way batteries do, “supercaps” store electricity by assembling ions on the surface of a porous material. The problem with the concept of using silicon as the porous material for supercaps is that silicon tends to react with chemicals which form the electrolyte, a chief component of any modern energy-storing device.
The novel device, developed at Vanderbilt University, takes care of the silicon reactivity problem by coating the silicon with a layer of graphene. The graphene layer, only several nanometers thin, passivates the porous silicon surface, preventing any reaction with the electrolyte. The graphene smoothly follows the structure of the pores in silicon. The silicon-graphene composite acts as the electrode of the supercap, resulting in large improvements in energy density compared to bare silicon. Taking into account the ubiquity of silicon, this new approach provides an exciting platform for grid-scale as well as integrated (portable) energy storage.
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- Making Graphene With A DVD Burneron November 13, 2020 at 4:01 pm
A group of researchers have figured out how to produce graphene using a DVD drive. This discovery helps clear the path for mass production of the substance, which was discovered in the late 1980’s.
- Ask Hackaday: Graphene Capacitors On Kickstarteron November 12, 2020 at 4:00 pm
I will admit I am skeptical of this Kickstarter. Apparently, these graphene supercaps are in part designed and manufactured by [Shawn] himself. He fabricates the graphene by putting graphite ...
- Global Graphene Nano Platelets (GNPs) Electronics Market to Witness a Pronounce Growth During 2025on October 22, 2020 at 1:06 am
LP INFORMATION recently released a research report on the Graphene Nano Platelets (GNPs) Electronics analysis, which studies the Electrical Cord Reels's industry coverage, current market ...
- First supercapacitor on a silicon chip could power phoneson October 24, 2013 at 7:55 am
(Credit: Pint Laboratory/Vanderbilt University) [related] Instead of storing energy in chemical reactions the way batteries do, “supercaps ... researchers grow graphene from silicon-carbide ...
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- Graphene’s Big Moment In Energy May Have Finally Arrivedon November 18, 2020 at 6:19 am
Graphene has long been touted as a game-changing material for electric vehicle batteries, but its moment in the sun may have finally arrived ...
- Laser Etching Graphene Supercapacitorson November 14, 2020 at 4:00 pm
you can literally print patterns of graphene using the laser in your DVD burner. By making the shapes shown above, you can introduce an electrolyte and turn the whole thing into a supercapacitor.
- Graphene For Supercapacitors Market SWOT Analysis of Top Key Player & Forecasts To 2025on November 13, 2020 at 12:54 am
The research study on the Graphene For Supercapacitors market is a detailed analysis of this industry vertical and includes substantial information - like the present status of the market over the ...
- 3D graphene framework high-performance supercapacitors with ultra-high energy storage densityon November 11, 2020 at 4:57 am
Constructing 3D graphene frameworks with ultra-thickness and rich ion transport paths is of great significance for the practical application of graphene supercapacitors. However, in thicker electrodes ...
- Graphene electrodes for better-performance supercapacitorson November 11, 2020 at 4:18 am
Constructing 3-D graphene frameworks with ultra-thickness and rich ion transport paths is of great significance for the practical application of graphene supercapacitors. However, in thicker ...