The rising tide of investment in energy storage really showed up this week, with a fresh $250 million investment from Goldman Sachs in Canadian compressed air energy storage firm Hydrostor; a new type of lithium ion battery design from Toshiba that can survive 8,000 recharges without power loss, and Freyr Battery in Norway lining up its first Gigafactory LFP cathode plant. These are very different investments, and are only a handful of the deluge of energy storage announcements this week. Expect further bombardments of stories of this type over the next two years, as alternative chemistries, lithium ion improvements and physical forms of storage fight it out for investor attention. Just prior to Christmas the Long Duration Energy Storage (LDES)…