Sustainable and safe aqueous proton batteries(APBs)have attracted significant attention owing to their unique“Grotthuss mechanism”.Although organic small molecules with stable and adjustable frameworks are promising...Sustainable and safe aqueous proton batteries(APBs)have attracted significant attention owing to their unique“Grotthuss mechanism”.Although organic small molecules with stable and adjustable frameworks are promising electrode materials,their easy dissolution in electrolytes and unsatisfactory intrinsic conductivity hinder their broad application in APB devices.Herein,2,7-diammonio-4,5,9,10-tetraone(PTO-NH_(3)^(+))with stable intermolecular hydrogen-bond networks was designed via an in situ electrochemical reduction strategy.The optimized molecule structure endows low charge transport barriers,high chemical reactivity,and prominent charge affinity.The fast kinetics of proton coordination/decoordination behavior in PTO-NH_(3)^(+)electrodes is corroborated by ex situ characterization techniques and theoretical calculations.As a result,the robust four-step 4e^(-)H^(+)coordination with PTO-NH_(3)^(+)electrode achieves an excellent rate performance(214.3 mA h g^(-1) at 0.05 A g^(-1) and112.9 mA h g^(-1) at 40 A g^(-1)),along with a long lifespan(10000 cycles).These findings shed light on further avenues towards advanced proton batteries.展开更多
To tackle the challenges associated with energy storage,dual-ion batteries have emerged as one of the most promising battery systems owing to their affordability and high energy density.In this work,a dualion desalina...To tackle the challenges associated with energy storage,dual-ion batteries have emerged as one of the most promising battery systems owing to their affordability and high energy density.In this work,a dualion desalination battery was designed,which employed NiCuHCF as the sodium-ion(Na^(+))intercalation cathode,Pb as the chloride-ion(Cl^(-))storage anode and 0.6 mol L^(-1) NaCl as the aqueous electrolyte.The electrochemical mechanism encompassed the processes of sodium ion(Na^(+))insertion and extraction at the cathode and the reversible transformation of lead(Pb)to lead chloride(PbCl_(2))at the anode.This unique system demonstrated exceptional electrochemical performance,including a high cycling stability(93.9%capacity retention at 1 C after 150 cycles),superior rate capability,and a high operating voltage(0.9 V).This research provides valuable insights into the large-scale commercialization potential of advanced aqueous dual-ion batteries.展开更多
基金supported by the Natural Science Foundation of Zhejiang Province(LY23B030005)National Natural Science Foundation of China(22209082)Natural Science Foundation of Ningbo Municipality(2023J098).
文摘Sustainable and safe aqueous proton batteries(APBs)have attracted significant attention owing to their unique“Grotthuss mechanism”.Although organic small molecules with stable and adjustable frameworks are promising electrode materials,their easy dissolution in electrolytes and unsatisfactory intrinsic conductivity hinder their broad application in APB devices.Herein,2,7-diammonio-4,5,9,10-tetraone(PTO-NH_(3)^(+))with stable intermolecular hydrogen-bond networks was designed via an in situ electrochemical reduction strategy.The optimized molecule structure endows low charge transport barriers,high chemical reactivity,and prominent charge affinity.The fast kinetics of proton coordination/decoordination behavior in PTO-NH_(3)^(+)electrodes is corroborated by ex situ characterization techniques and theoretical calculations.As a result,the robust four-step 4e^(-)H^(+)coordination with PTO-NH_(3)^(+)electrode achieves an excellent rate performance(214.3 mA h g^(-1) at 0.05 A g^(-1) and112.9 mA h g^(-1) at 40 A g^(-1)),along with a long lifespan(10000 cycles).These findings shed light on further avenues towards advanced proton batteries.
基金supported by the Ningbo Natural Science Foundation(2022J064 and 2023J099)NSAF joint Fund(U2330205 and U1830106).
文摘To tackle the challenges associated with energy storage,dual-ion batteries have emerged as one of the most promising battery systems owing to their affordability and high energy density.In this work,a dualion desalination battery was designed,which employed NiCuHCF as the sodium-ion(Na^(+))intercalation cathode,Pb as the chloride-ion(Cl^(-))storage anode and 0.6 mol L^(-1) NaCl as the aqueous electrolyte.The electrochemical mechanism encompassed the processes of sodium ion(Na^(+))insertion and extraction at the cathode and the reversible transformation of lead(Pb)to lead chloride(PbCl_(2))at the anode.This unique system demonstrated exceptional electrochemical performance,including a high cycling stability(93.9%capacity retention at 1 C after 150 cycles),superior rate capability,and a high operating voltage(0.9 V).This research provides valuable insights into the large-scale commercialization potential of advanced aqueous dual-ion batteries.
