Isn't there a new cathode material promising manyfold improvement announced about every three weeks or so? I'd like to see one of them actually deliver in new batteries. But instead, the 50% or so improvement we've seen over the last ten years have all been because of incremental refinement. Color me skeptical until it's proven in production.
There has been an enormous amount work on battery technology for the last 30 years. Probably 99% of it leads to dead ends.
Standard rule of battery development, if everything goes right it takes ten years to market. And another ten to get market share. In the late 90's early 2000's there was paper after paper published on lithium iron phosphate batteries and dick all nothing for sale until ~2010. And ten years later market share is growing slowly.