By ESS news
Chinese battery manufacturer Cornex New Energy has announced a range of sodium-ion battery cells, including new prismatic cells for stationary energy storage.
For the energy storage sector, Cornex has announced that its product range now includes 165 Ah and 58 Ah models. The 165 Ah sodium ion cell was highlighted because it contains a sodium iron pyrophosphate material in the cathode, using NFPP polyanion-type hard carbon as the anode. Named PN173-165A, the cell has obtained major certifications including Chinese National Standard GB, UN38.3, UL and IEC 62619.
Cornex positions it as “ideal for frequency regulation” with a very long lifespan; the company claims it achieves a 1P energy efficiency of 94.5% and a lifespan of over 20,000 cycles. It weighs 4.5 kg and has dimensions 71.7 mm x 174.4 mm x 207.2 mm.
In response to a question, Cornex said the nominal gravimetric energy density is 102 Wh/kg (0.5P), and the nominal volumetric energy density is 182 Wh/L (0.5P).
Compared to Cornex’s own LFP cells, Cornex’s 314 Ah cell weighs 5.6 kg, or about 24% more weight for 90% more energy, which gives an indication of where sodium ion limitations might be found given the lower density.
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