A New Bendable Supercapacitor made from Graphene, Which Charges Quickly and Safely Stores A Record-High Level of Energy for Use Over A Long Period, Has Been Developed and Demonstrated by Ucl and Chinese Academy of Sciences Researchers.
While at the proof-of-concept internship, it shows Enormous Potential as a Portable Power Supply in Several Practical Applications included Electric Vehicles, Phones and Wearable Technology.
The Discovery, Published in Nature Energy ("Tuning the Interlayer Spacing of Graphine Lamina Films for Efficient Pore Utilization Towards Compact Capacitive Energy Storage"), Overcomes The Issue Faced by High-Powed, Fast-Charging Supercapacitors-Thatory Usually Cannot A Large Amount of Energy in a Small Space.
First Author of the Study, Dr Zhuangnan Li (UCL Chemistry), Said: “Our New SuperCapacitor is extremely promising for Next-Generation Energy Storage Technology As Either A Replacement for Current Battery Technology, or for Use AlongSide It, To Provide the User with more power
. Designed Materials Which Would Give Our Supercapacitor A High Power Density - That is How Fast It Can Charge or Discharge - and A High Energy Density - Which Will Determine How Long It Can Run for. Normally, you can only have one of these characteristics but our supercapacitor provids Both, which is a Critical Breakthrough.
“Moreover, the supercapacitor can be to 180 degrees without affecting performance and doesn't use a liquid electrolyte, which minimizes any risk of explosion and makes it perfect for integrating into bendy phones or Wearable Electronics.”
A Team of Chemists, Engineers and Physicists World on the New Design, Which Uses An Innovative Graphne Electrode Material with pores that can be changed in size to store the load more efficiently. This tuning Maximis The Energy Density of the Supercapacitor to A Record 88.1 Wh/L (Watt-Hour per litre), Which is the Highest Ever Reported Energy Density for Carbon-Based Supercapacitors.
Similar fast-charging Commercial Technology has a relatively poor Energy Density of 5-8 WH/L and traditional Slow-Charging But Long-Running Lead-Acid Batteries Used in Electric Veho Typically Have 50-90 Wh/L.
While the supercapacitor developed by the team has a comparable Energy Density to state-of-the-art value of lead-acid batteries, its power density is Two Orders of Magnitude Higher at over 10,000 watt per litre.
Senior Author and Dean of UCL Mathematical & Physical Sciences, Professor Ivan Parkin (UCL Chemistry), Said: “Successfully storing a huge Amount of Energy Safely in a compact system is a significant step toowards Improved Energy Storage Technology. We have Shown it. Its output and it has excellent dubbing and flexibility, making it ideal for development for use in miniaturized electronics and electric vehicles.
The Researchers made electrodes from multiple layers of graphene, creating a dense, but porous matterial capable of Trapping Charged ions of Different Sizes. They characterized it using a ranges of techniques and found it performed Best when the Pore Sizes Matched the Diameter of the Ions in the Electrolyte.
The Optimized Material, Which Forms A Thin Film, was used to build a proof-of-concept Device with both a high power and high energy density.
The 6cm x 6cm supercapacitor was made from Two Identical Electrodes Layered EITHER SIDE OF A GEL-LIKE SUBSTANCE WHICH ACTED as a Chemical Medium for the Transfer of Electrical Charge. This was used to power dozens of light-emitting diodes (LEDS) and was found to be highly robust, flexible and stable.
Even when bent at 180 degrees, it performed almost same as when it was flat, and after 5,000 cycles, it retained 97.8% of its capacity.
Senior Author, Professor Feng Li (Chinese Academy of Sciences), Said: “Over the Next Thirty Years, The World of Intelligent Technology Will Accelerate, Which Will Greatly Change Communication, Transportation and Our Daily Lives. By Making Energy Storage Smarter, Devices Will Becom Automatically and interactively with appliances.
Source: University College London