Zinc-ion battery for residential applications – pv magazine International


Developed by Canadian start-up Salient Energy, the zinc-ion battery has a nominal capacity of 60 Ah, a nominal voltage of 1.3 V and a volumetric energy density of 100 Wh/L. The device measures 26cm x 24cm x 1.2cm and weighs 1.3kg

The Canadian company Salient Energy has developed a zinc-ion battery for stationary energy storage in residential applications.

“The batteries are currently manufactured at our facility in Dartmouth, Nova Scotia, Canada, with a capacity of 100 batteries per month,” a company spokesperson said. photo magazine. “Currently, we are in the process of scaling up production from this same pilot-scale facility to support pilot projects in the residential space. We are also developing our first gigafactory design, which will be located in the United States. or in Canada.

According to the manufacturer, its zinc-ion battery acts in the same way as existing lithium-ion storage systems. “The battery can respond almost instantly to store or provide clean power as needed. Since it has similar power capabilities to Li-ion, it is also well suited for short-term storage, which is a term for energy storage systems that can fully charge or discharge in just a few hours. “, explained the spokesperson.

“In general, zinc-ion energy storage systems operate similarly to lithium-ion, with the significant differences between the two being cost, security and supply chain abundance as opposed to performance. Plus, its water-based chemistry eliminates the risk of fire, making it a safe alternative to existing systems.

The battery measures 26cm x 24cm x 1.2cm and weighs 1.3kg. Its nominal capacity is 60 Ah and the nominal voltage is 1.3 V. The volumetric energy density is 100 Wh/L and the gravimetric energy density is 60 Wh/kg. Thethe life span for two weeks is 100% and that of six months is 95%.

“Our initial focus is the residential market, specifically starting by targeting homebuilders who are developing net zero homes and communities,” the spokesperson continued. “We are starting with the residential sector because of the importance of security for this market. We know that our fire-free systems will greatly simplify installation and give homeowners peace of mind. We plan to move from residential to industrial energy storage and utility-scale systems built for the grid. »

Zinc-ion has lagged behind other storage technologies due to difficulties in controlling side reactions that both limit reversible charging at the anode and cause cathode collapse. Zinc-ion, however, still has the potential for good energy storage performance from cheap and abundant materials.

According to a recent study from the University of Bremen in Germany, the two main obstacles for zinc-ion batteries to overcome in future research are increasing the specific energy of the complete Zn-ion cell and preventing the parasitic hydrogen. evolution reaction occurring during the Zn electrodeposition step.

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