Some examples of developments in tidal wave power generation:

(108) SR2000 Tidal Turbine 2018 2GWh - YouTube

(108) Turning the tide: Waves of energy | DW English - YouTube

(108) The revolutionary Orbital Marine SR 2000 tidal turbine - YouTube

The world's 'most powerful' tidal turbine is nearly ready to power on (msn.com)

Alternative energy sources are continuing to be developed to supplement, and in some cases replace, fossil fuel generation of electricity.  All sources are needed and the more energy generated then the greater need for ESU, Energy Storage Units.  Although there are many different types of ESU being developed, there will always be a place for ESU that relies on lithium batteries of some form.  Just another part of the story of expanding lithium demand.