Page Comparison

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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/

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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:

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

https://insideevs.com/news/338792/volkswagen-invests-100-million-in-solid-state-battery-start-up-quantumscape/

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.