A Novel High Temperature Metal-Air Battery

摘要

Based on the planar SOFC and SOE technology, a high temperature metal-air battery was operated at temperatures between 700°C and 800°C. It reached charging and discharging capacities of about 2 hours at power densities of more than 250mW/cm~2. A Siemens stack concept was developed and validated in numerous lab experiments as well as in several stack demonstrators of more than 1kW power output. The storage material is a proprietary development consisting of a iron/iron oxide combination which can be produced economically. It showed very low degradation rates of 1 - 2% in 1,000 charging / discharging cycles. More than 10,000 cycles were reached in 10×10 cm~2 short stacks. System efficiencies for the upper MW range of ＞ 60% will be achieved.