https://www.pv-magazine.com/2024/04/25/sodium-ion-battery-could-charge-in-several-seconds/
The researchers have reported that the newly developed hybrid surpasses the energy density of commercial lithium-ion batteries and exhibits the characteristics of supercapacitors' power density.Namely, the SIHES demonstrated an energy density of 247 Wh/kg and a fast-rechargeable power density of 34,748 W/kg, exceeding battery-type reactions by more than 100 folds. It also demonstrated cycle stability with around 100 % Coulombic efficiency over 5,000 charge-discharge cycles.
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