From the invention of a new power source or engine up to a vehicle that applies this power source to move forward sometimes is only a small step. But, to become a commercial success, this step might take even decades. Just think of the oldest type of engine powered by steam.
This site provides thermochemical, thermophysical, and ion energetics data compiled by NIST under the Standard Reference Data Program for over 40,000 compounds.
K. Peterson, D. Feller, und D. Dixon. Theoretical Chemistry Accounts: Theory, Computation, and Modeling (Theoretica Chimica Acta), 131 (1):
1-20(Januar 2012)