Scientists and researchers from ETH Zurich and IBM Research Zurich have built an extremely small redox flow battery - it's only around 1.5mm thick, and can potentially provide energy to tightly packed electronic components, while at the same time dissipating the heat that's produced by these components. Redox means reduction-oxidation, and the redox flow battery is rechargeable, thanks to two chemical components that are dissolved in liquids that are contained inside the battery system, and separated by a thin membrane. 3D printing technology was used to keep the batteries efficiently supplied with electrolytes. The tiny redox flow battery that the researchers constructed means that future computer chip stacks could not only receive electrical power, but also be cooled at the same time - basically, an electrochemical reaction produces electricity using two liquid electrolytes, "pumped to the battery cell from outside via a closed electrolyte loop." Read more at