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New Battery Technology

image credit: Paddy McGrath – pmcgphotos.com

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In this post we will look at two more lithium-ion battery designs that include solid electrolytes and metallic lithium anodes and a third similar design that was reviewed earlier. All three of these designs have progressed enough to where they should be in EVs that are on the road by 2025, but it has been a long road to these new designs.

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John Benson's picture
Thank John for the Post!
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Matt Chester's picture
Matt Chester on Mar 30, 2021

Do you foresee these batteries also having impactful use outside of the EV sector? 

Mark Silverstone's picture
Mark Silverstone on Mar 31, 2021

Thanks John. Do you think the "Storedot" technology which, purportedly, replaces graphite with semiconductor nanoparticles, made from germanium or silicon, are for real? They promise much larger and faster storage.

John Benson's picture
John Benson on Mar 31, 2021

Thanks for the questions, Matt & Mark.

Matt - there seems to be a divergence in batteries made for battery energy storage system (BESS) and EVs. This doesn't surprise me as the application profiles are completely different. If you look at Battery Day Part 1, linked in the intro of this paper Tesla is moving in this direction, and most of the solid-state lithium metal batteries reviewed in this post are mainly focused on EVs.

Mark: I vaguely remember these from a few years ago, but they seem to be an interim state on the way to a lithium metal anode.

Also if you look at they first "answer" in the QuantumScape section, they say: "A solid-state lithium-metal battery is a battery that replaces the polymer separator used in conventional lithium-ion batteries with a solid-state separator. The replacement of the separator enables the carbon or silicon anode used in conventional lithium-ion batteries to be replaced with a lithium-metal anode. The lithium metal anode is more energy dense than conventional anodes, allowing the battery to store a greater amount of energy in the same volume."

In other answers they point out other issues with an anode using graphite.

-John

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