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Stanford study quantifies energetic costs of grid-scale energy storage over time; current batteries the worst performers; the need to improve cycle life by 3-10x

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Using a new metric—“Energy Stored on Invested, ESOI”—they concluded that batteries were the worst performers, while compressed air energy storage (CAES) performed the best, followed by pumped hydro storage (PHS). The five battery technologies fared much worse. PHS followed at 210.

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New nanoparticle copper compound cathode could enable low-cost, long-life and high-power potassium-ion batteries for grid storage

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Short-term transients, including those related to wind and solar sources, present challenges to the electrical grid. Stationary energy storage systems that can operate for many cycles, at high power, with high round-trip energy efficiency, and at low cost are required. C, two-thirds of its maximum discharge capacity is observed.

Low Cost 304
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Pike Research forecasts worldwide grid energy storage spending to reach $22B by 2021, down from 2010 forecast of $35B

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Energy storage technologies represent an alternative to traditional grid management using generation assets such as natural gas peakers to balance the grid by adding power to it. The firm forecasts that load leveling/peak shifting will represent 31% of the total market, followed by arbitrage (12%) and T&D upgrade deferral (7%).

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PNNL team develops sodium-manganese oxide electrodes for sodium-ion rechargeable batteries

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low-cost Na-ion battery system for upcoming power and energy. solar and wind) with variable output to the electrical grid, grid managers require electrical energy storage systems (EES) that can accommodate large amounts of energy created at the source. Sodium-ion batteries have been discussed in the literature.

Sodium 218
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PNNL study outlines requirements for grid storage, reviews four electrochemical energy storage systems: vanadium redox flow, Na-beta, Li-ion and lead-carbon

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published in the ACS journal Chemical Reviews , reviews in detail four stationary storage systems considered the most promising candidates for electrochemical energy storage: vanadium redox flow; sodium-beta alumina membrane; lithium-ion; and lead-carbon batteries. Single-cell and tubular design of a Na-beta battery.

Li-ion 231