Where weight and size do not matter, more choices for batteries are possible.
E.g. redox flow batteries.
https://spectrum.ieee.org/green-tech/fuel-cells/its-big-and-...
In the near future, atmospheric CO2 will be recycled to create organic fuel.
http://newscenter.lbl.gov/2017/09/18/solar-fuel-system-recyc...
https://www.purdue.edu/newsroom/releases/2017/Q2/instantly-r...
Solid state batteries are also interesting. Lithium-ion batteries will be replaced because they can develop dendrites and catch fire.
https://cleantechnica.com/2018/06/26/the-solid-state-lithium...
https://www.researchgate.net/publication/324734826_Non-Tradi...
https://hardware.slashdot.org/story/17/04/19/016213/the-slas...