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Lithium-Ion Silicon Anode
https://enovix.com/2019/09/09/ev-battery-innovation/
Enovix seems to be making cells, they claim 325Wh/kg is possible with their 3D stack technology, using a silicon anode and a typical NMC cathode.
Lithium-Sulfur Batteries
https://www.theengineer.co.uk/lithium-sulphur-battery/
https://phys.org/news/2019-10-scientists-lithium-sulfur-battery-production-future.html
https://www.cnn.com/2020/01/06/tech/lithium-sulfur-battery-scli-intl-scn/index.html
Seems promising, 4x extra energy density given in some presentations, I have only seen these in the news sites. No official publications that I have seen yet, so probably a long way off from being commercialized. Most recent breakthrough came from Monash University (Melbourne), however multiple barriers to mass production such as rapid degradation. Previous attempts to overtake lithium-ion batteries since the major breakthrough in 2009 have failed, so possibly another 10 years if the technology proves to survive long periods of time.
Solid State Batteries
Some info from here:
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https://spectrum.ieee.org/energywise/energy/environment/a-glass-battery-that-keeps-getting-better
Ilika
Solid Power
Ford, BMW, Hyundai
Toyota (Claimed to be announcing something to coincide with the 2020 Olympics?)
QuantumScape
Stanford spinoff, $100million volkswagon investment
Sakti3
Bought and then sold by Dyson
https://en.wikipedia.org/wiki/Sakti3
https://fortune.com/2014/09/18/sakti3-lithium-ion-battery/
Dry Battery Electrode
Maxwell made the tech. Maxwell bought by Tesla. Working on it since 2011. Could be happening soon.
Zinc-Air
- Large scale grid storage
Flow Batteries
- Large scale grid storage
Aluminum-Air batteries
Very high energy density (4x Li-ion) but not rechargeable and lots of capacity loss.
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