May be switching from lithium and copper to sodium and aluminum

Just watched a good youtube vid. China's largest lithium battery manufacturer is preparing for a big change in battery chemistry. The manufacturing process stays the same though.
Weight will go down about 8% due to using aluminum instead of copper.
Cost will go down about 8% because sodium and aluminum are cheaper than copper and cobalt and lithium.
Energy density? They claim it is going up. We'll see about that.
Safer
When? "Sometime in 2023. We'll see about that.
https://www.youtube.com/watch?v=ts2vRBhj658
Weight will go down about 8% due to using aluminum instead of copper.
Cost will go down about 8% because sodium and aluminum are cheaper than copper and cobalt and lithium.
Energy density? They claim it is going up. We'll see about that.
Safer
When? "Sometime in 2023. We'll see about that.

First Bank:16 180 watt Grape Solar with FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
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We have 1000 times more sodium than lithium. Something like that also applies to aluminum vs. copper. They didn't say too much about the cobalt used in the higher performance batteries. Cobalt mining is also an absolute ecological disaster.