I agree. Tesla would never have bought Maxwell if they did not see very promising tech. Elon has repeatedly spoken out about promised disruptive battery tech, mostly saying what works in a lab on a micro-scale does not mean it is applicable to the large scale batteries that Tesla requires for its products.
Speaking of PowerPoint presentations though, I found
this interesting one by Maxwell dating back to (only) January 16th, 2019:
Mainly slides 9 and 10 are very interesting:
Patented Breakthrough Dry Battery Electrode Technology to Capitalize on Coming Megatrend
Dry Battery Electrode: Completing Major Performance Milestones
Transformational Battery Technology Enabling Electric Vehicle Megatrend
Energy Density:
>300 Wh/kg Demonstrated with Path to >500Wh/kg identified
Extended Battery Life:
Improved Durability; Extending Battery Life up to 2x
Cost Reduction:
16x Production Capacity Density Increase;
10-20%+ Cost Reduction versus State-of-the-Art Wet Electrodes
Technology Enablement & Environmentally Responsible:
No Solvents, Next Gen Materials, Cobalt-Free, Solid State
High Likelihood of Strategic Partnership(s) Within Six Months
The last line is classic
. They had basically already signed the contract with Tesla at that point.
The energy density numbers are also telling given Musks
recent tweet (June 30th):
FWIW, based on calcs I did 10 years ago, cross-over point for Li-ion beating kerosene is ~400 Wh/kg. High cycle batteries are just over 300 Wh/kg today, but probably exceed 400 in ~5 years.
According to Maxwell they had demonstrated 300 Wh/kg in January and Musk backs this up. (Unless he is talking about Tesla battery tech prior to Maxwell, I am not informed enough on batteries to know this)
Fortunately he is cautious in predicting future improvements but that can change quickly. I sincerely hope he won't pull an Autonomy Day stunt on Battery Investor Day (coming to a theatre near you this August):
(warning: fake quote) Elon: "We will achieve Energy Density of >500Wh/kg by the end of this year, definitely in 2020."
All jokes aside, I am very optimistic about the Maxwell technology. Even if they live up to half of what they claim, we are going to see serious improvement in battery density/life/... If it is indeed dry battery electrodes, this would explain why Tesla is not asking Panasonic to produce them. A new cell technology could be built by Tesla itself, given some CapEx and elbow grease.
Very curious to hear what Tesla will talk about on Battery Investor Day.