Performance of automotive fuel cell systems with nanostructured thin film catalysts

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Performance of automotive fuel cell systems with nanostructured thin film catalysts

Ahluwalia, R. / Wang, X. / Lasher, S. / Sinha, J. / Yang, Y. / Sriramulu, S.

The important performance and cost attributes of the 80-kW_c fuel cells with the nanostructured thin film (NSTF) catalyst are summerised and compared with results from a previous study with dispersed Pt catalysts. Also included are the corresponding 2010 Department of Energy (DOE) targets for automotive fuel cell systems. The following are some major conclusions from this study. At 0.3 mg/cm² total Pt content in ternary NSTF catalysts, it is possible to reach a stack power density of 750 mW/cm² at a cell voltage needed for 50% system efficiency at rated power. Water management and heat rejection are considerably simplified with the use of NSTF catalysts that operate drier and allow the stack temperature to exceed 90 deg C under infrequent driving conditions. With high volume manufacturing, the projected cost of the polymer electrolyte fuel cell (PEFC) stack with NSTF catalyst is 31 US-Dollar/kW_c, exclusive of the cost of stack conditioning and manufacturer's markups. The total projected cost of 80-kW_c fuel cells is 68 US-Dollar/kW_c at high volume manufacturing. The balance of plant (BOP) components and stack contribute equally to the total cost.