This is a request for information from the U.S. Department of Energyâ₏™s (DOE) Fuel Cell Technologies Office (FCTO) in the Office of Energy Efficiency and Renewable Energy (EERE) concerning advanced thermal insulation for sub-ambient temperature alternative fuel storage systems. DOE requests information on how to maintain vacuum stability of systems, use of advanced composites within the systems, and accelerated test methods to determine performance and applicability of materials and systems for long-term cold and cryogenic based alternative fuel storage systems for onboard vehicle applications. Alternative fuels could include hydrogen or natural gas stored onboard the vehicle at sub-ambient temperatures as a compressed gas, liquefied gas or adsorbed onto a porous material. This is solely a request for information and not a FOA; therefore, DOE is not accepting applications at this time. DOE will not respond to questions related to this RFI. Responses to this RFI must be submitted electronically to H2Storage@ee.doe.gov no later than 5:00pm (EDT) on 11/06/2015. Responses must be provided as attachments to an email. The full content of the announcement can be found on the EERE Exchange website at https://eere-exchange.energy.gov.