Lithium-Ion Now The Dominant Chemistry In Grid Energy Storage
The market of grid energy storage systems is expanding rapidly and is now transforming from molten salt batteries (typically sodium-sulfur NaS) to lithium-ion batteries.
According to Lux Research, as of January 2015, there was 1,100 MW and 2,523 MWh of grid storage installed over 605 projects worldwide. Most of them were built in Japan (1,174 MWh) and US.
In 2014 alone, 450 MW and 730 MWh were added.
90% (or 419 MW and 1,555 MWh) of the systems proposed last year were with lithium-ion batteires.
At such high values of MW/MWh of new proposed installations, NaS soon will lose its high market share of 23% of all deployed MW and 64% of deployed MWh.
From several lithium-ion battery types LFP and NMC are most popular:
“LFP, NMC are the leading Li-ion cathodes. Within the Li-ion battery chemistries, lithium iron phosphate (LFP) is the largest cathode deployed by MW and MWh, with market shares of 39% and 38.1%, respectively, followed by nickel-manganese-cobalt (NMC), which is rapidly becoming the cathode of choice among developers.”
ESS are used mostly for demand management (376 MW and 1,335 MWh across 236 projects) and renewable connect systems (513 MW and 890 MWh across 261 projects).
Source: Green Car Congress