Aqueous zinc-ion batteries have advantages over lithium-ion batteries,such as low cost,and good safety.However,their development is currently facing several challenges.One of the main critical challenges is their poor...Aqueous zinc-ion batteries have advantages over lithium-ion batteries,such as low cost,and good safety.However,their development is currently facing several challenges.One of the main critical challenges is their poor electrode–electrolyte interface.Addressing this requires understanding the physics and chemistry at the electrode–electrolyte interface,including the cathode-electrolyte interface and anodeelectrolyte interface.This review first identifies and analyses the interfacial challenges of aqueous zincion batteries.Then,it discusses the design strategies for addressing the defined interfacial issues from the perspectives of electrolyte optimization,electrode modification,and separator improvement.Finally,it provides corrective recommendations and strategies for the rational design of electrode–electrolyte interface in aqueous zinc-ion batteries towards their high-performance and reliable energy storage.展开更多
This work reports influence of two different electrolytes,carbonate ester and ether electrolytes,on the sulfur redox reactions in room-temperature Na-S batteries.Two sulfur cathodes with different S loading ratio and ...This work reports influence of two different electrolytes,carbonate ester and ether electrolytes,on the sulfur redox reactions in room-temperature Na-S batteries.Two sulfur cathodes with different S loading ratio and status are investigated.A sulfur-rich composite with most sulfur dispersed on the surface of a carbon host can realize a high loading ratio(72%S).In contrast,a confined sulfur sample can encapsulate S into the pores of the carbon host with a low loading ratio(44%S).In carbonate ester electrolyte,only the sulfur trapped in porous structures is active via‘solid-solid’behavior during cycling.The S cathode with high surface sulfur shows poor reversible capacity because of the severe side reactions between the surface polysulfides and the carbonate ester solvents.To improve the capacity of the sulfur-rich cathode,ether electrolyte with NaNO_(3) additive is explored to realize a‘solid-liquid’sulfur redox process and confine the shuttle effect of the dissolved polysulfides.As a result,the sulfur-rich cathode achieved high reversible capacity(483 mAh g^(−1)),corresponding to a specific energy of 362 Wh kg^(−1) after 200 cycles,shedding light on the use of ether electrolyte for high-loading sulfur cathode.展开更多
基金The Australian Research Council(ARC)is acknowledged for providing funding under projects FL170100101 and DP200102573。
文摘Aqueous zinc-ion batteries have advantages over lithium-ion batteries,such as low cost,and good safety.However,their development is currently facing several challenges.One of the main critical challenges is their poor electrode–electrolyte interface.Addressing this requires understanding the physics and chemistry at the electrode–electrolyte interface,including the cathode-electrolyte interface and anodeelectrolyte interface.This review first identifies and analyses the interfacial challenges of aqueous zincion batteries.Then,it discusses the design strategies for addressing the defined interfacial issues from the perspectives of electrolyte optimization,electrode modification,and separator improvement.Finally,it provides corrective recommendations and strategies for the rational design of electrode–electrolyte interface in aqueous zinc-ion batteries towards their high-performance and reliable energy storage.
基金This research was supported by the Australian Research Council(ARC)(DE170100928,DP170101467)an Australian Renewable Energy Agency(ARENA)Project(G00849).The authors acknowledge the use of the facilities at the UOW Electron Microscopy Center(LE0882813 and LE0237478)and Dr.Tania Silver for critical reading of the manuscript.
文摘This work reports influence of two different electrolytes,carbonate ester and ether electrolytes,on the sulfur redox reactions in room-temperature Na-S batteries.Two sulfur cathodes with different S loading ratio and status are investigated.A sulfur-rich composite with most sulfur dispersed on the surface of a carbon host can realize a high loading ratio(72%S).In contrast,a confined sulfur sample can encapsulate S into the pores of the carbon host with a low loading ratio(44%S).In carbonate ester electrolyte,only the sulfur trapped in porous structures is active via‘solid-solid’behavior during cycling.The S cathode with high surface sulfur shows poor reversible capacity because of the severe side reactions between the surface polysulfides and the carbonate ester solvents.To improve the capacity of the sulfur-rich cathode,ether electrolyte with NaNO_(3) additive is explored to realize a‘solid-liquid’sulfur redox process and confine the shuttle effect of the dissolved polysulfides.As a result,the sulfur-rich cathode achieved high reversible capacity(483 mAh g^(−1)),corresponding to a specific energy of 362 Wh kg^(−1) after 200 cycles,shedding light on the use of ether electrolyte for high-loading sulfur cathode.
