A high-power and long-life aqueous rechargeable Zn-ion battery based on hierarchically porous sodium vanadate. Issue 64 (13th July 2020) - Qiu, Nan
Abstract : A high-power and long-life aqueous rechargeable Zn-ion battery with consequent capacitive- and diffusion-controlled mechanism. Abstract : Recently, there has been renewed interest in aqueous Zn-ion batteries. Here, electrochemical and structural changes of hierarchically porous sodium vanadate (NVO) in aqueous Zn-ion batteries are demonstrated. The hierarchically porous NVO cathode exhibits a high power density of 7139 W h kg −1 at 10 A g −1 and excellent long-term cyclability. Moreover, the consequent capacitive- and diffusion-controlled mechanism in Zn/NVO battery chemistry has been first reported. Such a hybrid control mechanism may certainly trigger new opportunities in the rapid development of Zn-ion batteries.