Li-ion battery dominating choice in grid storage tech

Lithium-ion (Li-ion) batteries have become the dominant technology in grid storage, accounting for 90 percent of systems proposed in 2014, according to Lux Research.

Credit: Lux Research

Molten salt batteries still account for a majority of installations by energy capacity, because of NGK Insulators’ early lead, but are no longer the technology of choice, Lux contends.

In terms of technology within the Li-ion battery chemistries, lithium iron phosphate (LFP) is the largest cathode deployed by MW and MWh, with market shares of 39 percent and 38.1 percent, respectively, according to Lux, followed by nickel-manganese-cobalt (NMC), which is rapidly becoming the cathode of choice among developers.

Li-ion accounted for 419 MW and 1,555 MWh of proposed storage systems in 2014. But molten salt batteries – consisting almost entirely of sodium-sulfur (NaS) – account for 23 percent of all deployed MW and 64 percent of deployed MWh respectively. Globally, as of January 2015, 1,100 MW and 2,523 MWh of grid storage have been deployed across 605 projects.

Demand management and renewable connected systems are driving the primary grid storage applications, Lux reports. Demand management (376 MW and 1,335 MWh across 236 projects) — driven in the U.S. by time-of-use rates and tiered pricing — and renewable connect systems (513 MW and 890 MWh across 261 projects) are the leading applications for energy storage.

“Driven by renewable-connected systems and demand management, grid-scale energy storage is taking off, with 450 MW and 730 MWh of systems installed in 2014,” said Dean Frankel, Lux Research associate and the lead author of the research. “As the market matures, new roles along the grid storage value chain are emerging — including financiers who enable leasing services to storage developers and their end-customers as well as battery operators who manage and control a systems’ role on the electric grid.”

Lux Research also found that Japan and the U.S. hold the market lead. Japan maintained its lead in installed energy storage capacity with 1,174 MWh while the United States held global leadership in power and number of projects with 418 MW across 250 projects.

For more:
– see this report

Related articles:
U.S. leading energy storage deployments
New flow battery holds promise but not without challenges
SRP teams with ASU to test battery storage for PV customers
Longer lasting EV batteries from lithium-air technology?