I'm pretty sure that Tesla actually as a plan ( or an option ) to do that from the factory already.
Here's some interesting links about expected life and what is actually happening.
https://medium.com/tradr/teslas-approach-to-recycling-is-the-way-of-the-future-for-sustainable-production-5af99b62aa0e
Here's what Nissan is doing.
https://www.extremetech.com/extreme/266346-nissan-recycling-old-electric-vehicle-batteries-power-street-lights
BMW.
https://www.engadget.com/2018/10/15/bmw-ev-battery-recycling-program/
https://www.reuters.com/article/us-nissan-battery/nissan-spins-up-new-plant-to-give-second-life-to-ev-batteries-idUSKBN1H30DD
https://www.manufacturing.net/news/2018/04/nissan-opens-japans-first-ev-battery-recycling-plant-give-leaf-new-life
https://electrek.co/2018/09/25/renault-energy-storage-system-used-electric-car-battery-packs/
