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AnonTechie [soylentnews.org] writes:

Flexible super-capacitor raises bar for volumetric energy density

Scientists have taken a large step toward making a fiber-like energy storage device that can be woven into clothing and power wearable medical monitors, communications equipment or other small electronics.
The device is a supercapacitor-a cousin to the battery. This one packs an interconnected network of graphene and carbon nanotubes so tightly that it stores energy comparable to some thin-film lithium batteries-an area where batteries have traditionally held a large advantage. The product's developers, engineers and scientists at Nanyang Technological University (NTU) in Singapore, Tsinghua University in China, and Case Western Reserve University in the United States, believe the storage capacity by volume (called volumetric energy density) is the highest reported for carbon-based microscale supercapacitors to date: 6.3 microwatt hours per cubic millimeter.

http://phys.org/news/2014-05-flexible-supercapacit or-bar-volumetric-energy.html [phys.org]

http://www.nature.com/nnano/journal/vaop/ncurrent/ full/nnano.2014.93.html [nature.com] (paywalled)

http://case.edu/cse/eche/daigroup/Journal%20Articl es/2014/CHEN%20TAO-2014.pdf [case.edu] (Warning PDF)

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