Metal-Supported SOFCs for Ethanol-Fueled Vehicles
Project Innovation + Advantages:
Lawrence Berkeley National Laboratory (LBNL) is developing a metal-supported SOFC (MS-SOFC) stack that produces electricity from an ethanol-water blend at high efficiency and energy density. This technology will enable light- to medium-duty hybrid passenger EVs to operate at a long range, with higher efficiency than gasoline vehicles and lower greenhouse gas (GHG) emissions than current vehicles. LBNL’s MS-SOFCs are mechanically rugged: they can heat from room temperature to their approximately 700°C (1292 °F) operating temperature within a few minutes without cracking and tolerate rapid temperature changes. Usually, ethanol fuel is converted into hydrogen and carbon monoxide prior to entering the fuel cell, which adds volume, cost, and complexity. The team will adapt these MS-SOFCs to operate on liquid ethanol-water fuel directly, while maintaining their high performance and durability, and tackle challenges around scale-up.
LBNL’s MS-SOFC features low materials cost, rapid start-up time, and unprecedented power density to meet vehicle requirements.
GHG emissions will be reduced by 67% or more, from 305 g/mile for the internal combustion engine (ICE) average to 87 to 102 g/mile for the new system.
The proposed system’s efficiency is expected to be 55 to 65 miles per gallon-equivalent (MPGe), which greatly exceeds the U.S. ICE average of 36 MPGe.