Journal Article carbon nanotubes 15FIX9V2JP 7631-86-9 D1JT611TNE Nanotubes, Carbon Research Support, Non-U.S. Gov't Review Silicon Dioxide Titanium airflow bimetallic energy density energy storage floating catalyst graphene cage lithium sulfides lithium-sulfur batteries mechanical energy networks nickel phosphosulfide power density sensors sulfiphilic suspended carbon nanotube networks synthesis titanium dioxide ultralong