Toyota’s Chief Scientist on Hydrogen vs. Lithium-Ion Batteries & Why We Need Both

It is that diversity is a better solution than monoculture.

In particular:

Lithium, when used in lithium-ion batteries, has high energy efficiency and uses existing charging infrastructure, but has low energy per mass and limited charging rate, making it impractical for large vehicles.

By contrast, Hydrogen, as used in hydrogen fuel cells and engines, has high energy per mass and a high charging rate, but lower energy efficiency and needs new charging infrastructure. In contrast to lithium-ion batteries, hydrogen particularly excels in large vehicles.

Each approach has its benefits and its drawbacks, and each is strong where the other is weak:

If we understand the complementary advantages of Lithium and Hydrogen, and the 150-year-old lessons from the War of the Currents, there is no need to pick a winner now, and no reason to impose a single winner when the likely best solution will be both, depending on circumstances.

In other words, there’s no need for a war at all.

Read more here.