METHOD AND APPARATUS FOR HIGH SURFACE AREA CARBON STRUCTURES WITH MINIMIZED RESISTANCE

摘要

A device such as, for example, a three-dimensional micro battery includes a collection of slender electrodes on a current collector. When the electrodes are made entirely of carbon, the electrical resistance along the slender electrodes grows excessive and the system loses efficiency. This resistance can be lowered by having the core of the electrodes be made of a good electrical conductor while their surface conformally coated with a thin film or coating of carbon. The device maintains a large total area of active carbon available for electrochemical reactions while improving the current-collecting efficiency by decreasing the electrical resistance along the slender electrodes. The half cell may be incorporated into a full microbattery to provide high energy density at high discharge rates. The same advantages can be applied to lowering thermal resistance.