With some incremental improvements (which are already happening), this could become very practical and it wouldn't be surprising if in the near future we saw some electric buses using ultracapacitors instead of heavier and more expensive chemical batteries. (treehugger.com)
At Tesla, Elon has overseen product development and design from the beginning, including the all electric Tesla Roadster, Model S and Model X. Transitioning to a sustainable energy economy, in which electric vehicles play a pivotal role, has been one of his central interests for almost two decades, stemming from his time as a physics student working on ultracapacitors in Silicon Valley. (edisonawards.com)