Rio Tinto bets on lithium as Tesla yet to sign major supply deal

[caption id="attachment_840923" align="aligncenter" width="600"] Image by Bennyartist |Shutterstock.com[/caption] Mining giant Rio Tinto (LON:RIO) wants to be one of the first major miners to get a grip on the lithium market, one of the very few commodities, if not the only...