Membrane (IMAGE) Penn State Caption This is an example membrane -- a cost-efficient and durable alternative for fuel cells consisting of two electrodes with a clear membrane sandwiched between them. Credit Patrick Mansell Usage Restrictions non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.