Quoted from the article

Maybe ZEN has just what Tesla needs.

"In addition to improvements in chemistry, Tesla is aiming to reduce its battery costs by bringing in-house the suppliers of base materials, like lithium, cobalt, graphite and nickel, in order to lower material costs. Experts estimate that materials make up 60% of battery costs. - See more at: http://investorintel.com/technology-metals-press/tesla-partners-with-battery-researcher-to-lower-costs"