Rechargeable aqueous zinc-ion batteries(AZIBs) are attracting tremendous attention because of their intrinsic merits such as high safety and low cost. Cathode plays a critical role in enhancing the electrochemical per...Rechargeable aqueous zinc-ion batteries(AZIBs) are attracting tremendous attention because of their intrinsic merits such as high safety and low cost. Cathode plays a critical role in enhancing the electrochemical performance of AZIBs. However, it is difficult to design a robust and high-efficiency cathode material and further implement the commercialization of AZIBs. Metal-organic frameworks(MOFs) electroactive compounds are attractive to serve as the cathode of AZIBs due to their unique porosity and crystal structures, resource renewability and structural diversity. In this work, a calcium-pure terephthalates acid framework(Ca-PTA·3H_(2)O) was synthesized by facile hydrolysis and cationic exchange method,then explored as a novel cathode for AZIBs. The results highlight a high specific capacity of 431 mAh/g(0.51 mAh/cm^(2)) at a current density of 50 mA/g, and excellent cycle performance with capacity retention of ~90% after 2700 cycles at 500 m A/g. The following up characterizations investigate the reversible zinc storage mechanism in detail. This experiment made a specific contribution to the exploration of the new MOF as a competitive cathode for AZIBs.展开更多
Aqueous rechargeable batteries with high safety have been considered as the main energy source to power portable and wearable electronics.Herein,we report the first construction of quasi-solid-state aqueous tin-iodine...Aqueous rechargeable batteries with high safety have been considered as the main energy source to power portable and wearable electronics.Herein,we report the first construction of quasi-solid-state aqueous tin-iodine batteries by exploiting Sn foil as anode,carbon cloth as cathode,and gel electrolytes.The anode reversibly converts from K_(2)Sn(OH)_(6) to metal Sn,thus eliminating the formation of metal dendrites.Meanwhile,gel electrolytes alleviate anode corrosion and enhance the utilization of the anode.Therefore,the asfabricated quasi-solid-state batteries manifest an areal capacity of 700μAh cm^(-2)(211 mAh g^(-1) equal to theoretical capacity)and excellent cycling stability without obvious capacity degradation after 120 cycles at 1mA cm^(-2).Remarkably,the designed batteries sealed by different package materials including plastic,glass,wood,and cardboard operated steadily,thereby enlarging the application scenario for these batteries.This work enriches the family of aqueous rechargeable batteries and sheds light on the construction of high-performance quasi-solid-state aqueous batteries.展开更多
基金supported by the discipline construction funds from Qingdao Municipal Science and Technology Commission and Qingdao University (Nos. DC1900013623 and DC2000003363)Youth Project of Natural Science Foundation of Shandong Provincial (No. ZR2021QB175)+2 种基金supported by Natural Science Foundation of ShandongNational Natural Science Foundation of China (No. 51877045)the Foundation from State Key Laboratory of Materials Oriented Chemical Engineering (No. KL19-09) the Fundamental Research Funds for the Central Universities。
文摘Rechargeable aqueous zinc-ion batteries(AZIBs) are attracting tremendous attention because of their intrinsic merits such as high safety and low cost. Cathode plays a critical role in enhancing the electrochemical performance of AZIBs. However, it is difficult to design a robust and high-efficiency cathode material and further implement the commercialization of AZIBs. Metal-organic frameworks(MOFs) electroactive compounds are attractive to serve as the cathode of AZIBs due to their unique porosity and crystal structures, resource renewability and structural diversity. In this work, a calcium-pure terephthalates acid framework(Ca-PTA·3H_(2)O) was synthesized by facile hydrolysis and cationic exchange method,then explored as a novel cathode for AZIBs. The results highlight a high specific capacity of 431 mAh/g(0.51 mAh/cm^(2)) at a current density of 50 mA/g, and excellent cycle performance with capacity retention of ~90% after 2700 cycles at 500 m A/g. The following up characterizations investigate the reversible zinc storage mechanism in detail. This experiment made a specific contribution to the exploration of the new MOF as a competitive cathode for AZIBs.
基金sponsored by the NSFC(grant nos.21671020,51673026,22035005,and 52073159)the Natural Science Foundation of Beijing Municipality(grant no.2222075)+1 种基金the National Key R&D Program of China(grant no.2017YFB1104300)the Analysis&Testing Center,Beijing Institute of Technology.
文摘Aqueous rechargeable batteries with high safety have been considered as the main energy source to power portable and wearable electronics.Herein,we report the first construction of quasi-solid-state aqueous tin-iodine batteries by exploiting Sn foil as anode,carbon cloth as cathode,and gel electrolytes.The anode reversibly converts from K_(2)Sn(OH)_(6) to metal Sn,thus eliminating the formation of metal dendrites.Meanwhile,gel electrolytes alleviate anode corrosion and enhance the utilization of the anode.Therefore,the asfabricated quasi-solid-state batteries manifest an areal capacity of 700μAh cm^(-2)(211 mAh g^(-1) equal to theoretical capacity)and excellent cycling stability without obvious capacity degradation after 120 cycles at 1mA cm^(-2).Remarkably,the designed batteries sealed by different package materials including plastic,glass,wood,and cardboard operated steadily,thereby enlarging the application scenario for these batteries.This work enriches the family of aqueous rechargeable batteries and sheds light on the construction of high-performance quasi-solid-state aqueous batteries.
