Hi-test coffee batteries. Sony's demoed a Li-on batt that runs on old coffee-grounds.
The company said that it has currently established a mass-production process, which had been proposed, for the carbonaceous negative electrodes using waste coffee grounds. The achievement of using coffee grounds as material of negative electrode already have been disclosed in the company's environmental report. A lot of grounds from strained coffee beans are available, estimated to be 300,000 tons annually, where coffee-in-a-can is consumed in large quantities in Japan. However, there was no recycling method for those lees, so it is expected to be an efficient utilization to use in the lithium-ion secondary battery as a negative electrode.
(via Interesting People)
