Toward battery electric and hydrogen fuel cell military vehicles for land, air, and sea

Low-cost solutions to global warming, air pollution, and energy insecurity for 145 countries

“…However, technical feasibility studies of long-distance transport with fuel cells have been performed. 41…”

“…They also power long-distance air, water, and land military transport. 41 Gasoline lawnmowers, leaf blowers, and chainsaws are converted to electric equivalents.…”

“…However, technical feasibility studies of long-distance transport with fuel cells have been performed. 41 Once all annual-average BAU loads in 2050 are converted to electricity and heat loads to be met by WWS generators, WWS generator nameplate capacities are estimated for each of the 145 countries to meet the loads (Note S2, ESI †). Such estimates rely on a resource analysis for each country (Note S2, ESI †).…”

Comment on “Low-cost solutions to global warming, air pollution, and energy insecurity for 145 countries” by M. Z. Jacobson, A. von Krauland, S. J. Coughlin, E. Dukas, A. J. H. Nelson, F. C. Palmer and K. R. Rasmussen, Energy Environ. Sci., 2022, 15, 3343–3359

“…They also power long-distance air, water, and land military transport”. They base this assertion on a paper by S. M. Katalenich and M. Z. Jacobson 1 Fig. 5 in this paper shows that the specific energy content in batteries is still one or two orders of magnitude too small for this task.…”

“…2 Carbon fibre cylinders can reach 2.0 kW h kg À1 of hydrogen, 3 but this ratio is still way below the 21 kW h kg À1 needed. 1 It turns out that this high value can only be reached with cryogenic storage. 1 However, liquefaction of hydrogen consumes at least 30% of its own energy content.…”