Great article Inca,

Here's another one below..Good part to read about is the "anatomy of the Lithium Ion Battery", when you scroll down in the article.

Notice,..."2 of the 3 major compontents of the Lithium Ion battery...have not changed much.."...notice the Anode?

https://www.teslarati.com/tesla-doubles-lithium-ion-battery-cell-life/

 In addition to improved battery chemistry, there are ongoing cost reductions taking place as “Tesla has become the largest buyer of li-ion batteries and now [with the Gigafactory] it is trying to become the largest producer of li-ion batteries.”

Kurt Kelty, Tesla’s longtime director of battery technology, is finding economies of scale sourcing raw materials: “Nickel, Cobalt, Graphite and lithium [which serve] as the biggest cost drivers for the overall battery cost.” It’s already been confirmed that Tesla has reduced battery costs overall by 35%.

Visual Captialist also points out another area where battery improvements may exist — the cathode