Supercapacitors and Li-ion Batteries in one Tidy Device

Genesis Nanotechnology

Electronics-research-001A team of researchers at Rice University in the US has fabricated 3D nanostructured thin-film electrodes using tantalum oxide nanotubes and “carbon-onion”-coated iron oxide nanoparticles. The thin films appear to be excellent lithium-ion batteries while being good supercapacitors too. The devices might be ideal in next-generation hybrid energy-storage applications, including wearable “smart textiles”.

Electrochemical energy-storage devices such as Li-ion batteries (LIBs) and electrochemical supercapacitors (ECs) are currently the best option for powering portable electronics. Even better would be to combine the two types of device into one multifunctional electrode that combines the high energy density and capacity of Li-ion batteries with the high power density of supercapacitors. Capacitors are devices that store electric charge but ECs can store much more charge thanks to the double layer formed at an electrolyte-electrode interface when voltage is applied.

Until now, researchers have mainly studied carbon materials such as nanotubes and…

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