March 3, 2021 UMD Home FabLab AIMLab



Sometimes it seems like it takes forever to charge your phone. That’s because a chemical reaction inside your battery needs time to happen. A supercapacitor doesn't use a chemical reaction, instead it just attracts energy to one of its ends. This means it charges and discharges quickly. Supercapacitors don't hold enough charge to alone power a phone, but are often used in regenerative brakes for hybrid cars, where a brief surge of energy is all that’s needed. An even more environmentally-friendly supercapacitor has been invented by engineers at the University of Maryland: It's all made of wood.

When alive, the tree grew channels to draw water from the ground. Now Liangbing Hu, of the department of materials science, and his team have used those channels to transmit the electrical charge, made even straighter by heating them and exposing them to carbon dioxide. The other end of the supercapacitor is also baked at a high temperature and then filled with electricity attracting material. In the middle, a piece of unbaked wood is filled with a gel that conducts ions. The wood sandwich works as well as traditional metal-oxide supercapacitors, and can stand up to ten thousand charge and discharge cycles without losing capacity.

“Our all-wood supercapacitor is cheap, safe, environmentally friendly and biocompatible,” said Chaoji Chen, first author of the article. “Also, the cycling life is longer and power density is higher than comparable batteries already used in similar applications.”

The work was published last month in the journal Energy & Environmental Science, and was funded by the Nanostructures for Electrical Energy Storage, a Department of Energy-funded Energy Frontier Research Center, headquartered at the University of Maryland.

All-wood, low tortuosity, aqueous, biodegradable supercapacitors with ultra-high capacitance

dx.doi.org/10.1039/C6EE03716J

Energy Environ. Sci., 2017



Related Articles:
Micro-reactor Produces Quality Nanoparticles
Thin Wood Film Amplifies Speaker Technology
'Wood' You Like Some Fresh Water?
Cooling Wood: An Eco-Friendly Building Material
Wood-based Technology Creates Electricity from Heat
Sturdy Insulator Made of Wood
Wood Provides a Spongy, Eco-Friendly Replacement for Synthetic Materials
Super Wood Could Replace Steel
UMD Researchers Work to Mitigate Water Scarcity Crisis with Solar-Powered Devices Made of Wood
Wood filter removes toxic dye from water

February 16, 2017


«Previous Story  

 

 

Current Headlines

NanoCenter Announce AIM Lab, FabLab Winter Break Schedule

Nanoscale Imaging Method Offers Insight into Alloyed Nanoparticle Synthesis

Could Nanocellulose Save Us?

CREB Kicks Off 2021 With Bi-Annual Meeting to Discuss Future of Battery Research

UMD Launches New Brain and Behavior Institute, Announces Founding Director

10 Maryland MSE Faculty Members Ranked in Top 2% of World Scientists

Scientists Design and Synthesize Denary Oxide Nanoparticles as Highly Stable Catalysts

Hollow, Multi-Metallic Nanoparticles Offer Novel Strategy for Synthesis of Highly Efficient Catalysis

Three Clark School Professors Receive Competitive DURIP Grants

Mighty Morphing 3D Printing

 

Colleges A. James Clark School of Engineering
The College of Computer, Mathematical, and Natural Sciences

Communicate Join Email List
Contact Us
Follow us on TwitterTwitter logo

Links Privacy Policy
Sitemap
RSS

Copyright The University of Maryland University of Maryland
2004-2021