As an effective energy storage technology, rechargeable batteries have long been considered as a promising solution for grid integration of intermittent renewables(such as solar and wind energy). However,their wide ap...As an effective energy storage technology, rechargeable batteries have long been considered as a promising solution for grid integration of intermittent renewables(such as solar and wind energy). However,their wide application is still limited by safety issue and high cost. Herein, a new battery chemistry is proposed to satisfy the requirements of grid energy storage. We report a simple Cu-Mn battery, which is composed of two separated current collectors in an H2SO4-CuSO4-MnSO4 electrolyte without using any membrane. The Cu-Mn battery shows an energy density of 40.8 Wh L-1, a super-long life of 10,000 cycles(without obvious capacity decay) and negligible self-discharge. And the capital cost of US$ 11.9 kWh-1 based on electrolyte is lower than any previous batteries. More importantly, the battery can still work smoothly during thermal abuse test and drill-through test, showing high safe nature. Furthermore, a combination system integrating the Cu-Mn battery and hydrogen evolution is also proposed, which is able to avoid the generation of explosive H2/O2 mixture, and presents an efficient approach for grid energy storage and conversion.展开更多
Proton exchange membrane fuel cells(PEMFCs)have received a sustained world-wide attention owing to their promising applications based on clean energy.However,their widespread applications are still restricted by the s...Proton exchange membrane fuel cells(PEMFCs)have received a sustained world-wide attention owing to their promising applications based on clean energy.However,their widespread applications are still restricted by the sluggish oxygen reduction reaction(ORR)process.Over the past decades,significant efforts have been devoted to developing efficient ORR catalysts,which have been summarized in numerous previous reviews.Unfortunately,most of them mainly focused on ORR activity on the rotating disk electrode(RDE)level,which cannot truly represent the performance in real applications.Developing and showcasing efficient catalysts evaluated at the membrane electrode assembly(MEA)level is of vital importance.In this review,we first briefly showcased the recent development of ORR catalysts and then put more emphasis on the discussion of designing efficient catalysts at MEA and full-cell level,aiming to help stimulate more attention on their practical applications.展开更多
Ferrocene and SOD-ferrocene modified gold electrodes were made by crosslinkage method with fress egg white and glutaraldehyde,and cyclic voltammetry was used to study these electrodes in phosphate buffer solution of d...Ferrocene and SOD-ferrocene modified gold electrodes were made by crosslinkage method with fress egg white and glutaraldehyde,and cyclic voltammetry was used to study these electrodes in phosphate buffer solution of different pH values and different concentrations of H2O2.The results indicated that in alkaline solution the cathodic response of ferroence was inhibited more greatly than the anodic response of ferrocene.The results also indicated that the cathodic peak current of ferrocene decreased rapidly while the anodic peak current decrased slightly with the addition of H2O2.But the ferrocene modified on the electrode was not lost,so we concluded that ferroence（+1）could be catalytic to the decomposition of H2O2.The behavior of SOD-ferrocene modified electrode indicated that SOD could prohibit the decrease of the peak current of ferrocene in the presence of H2O2.But with the increase of concentrations of H2O2 the peak currents of SOD-ferrocene modified electrode began to decrease too;and it could take on the same electrohehavior of ferrocene modified electrode when the concentrations of H2O2 are high enough.展开更多
基金financially supported by the National Natural Science Foundation of China (21622303, 21333002, 21805126)National Key Research and Development Plan (2016YFB0901500, 2016YFA0203302)
文摘As an effective energy storage technology, rechargeable batteries have long been considered as a promising solution for grid integration of intermittent renewables(such as solar and wind energy). However,their wide application is still limited by safety issue and high cost. Herein, a new battery chemistry is proposed to satisfy the requirements of grid energy storage. We report a simple Cu-Mn battery, which is composed of two separated current collectors in an H2SO4-CuSO4-MnSO4 electrolyte without using any membrane. The Cu-Mn battery shows an energy density of 40.8 Wh L-1, a super-long life of 10,000 cycles(without obvious capacity decay) and negligible self-discharge. And the capital cost of US$ 11.9 kWh-1 based on electrolyte is lower than any previous batteries. More importantly, the battery can still work smoothly during thermal abuse test and drill-through test, showing high safe nature. Furthermore, a combination system integrating the Cu-Mn battery and hydrogen evolution is also proposed, which is able to avoid the generation of explosive H2/O2 mixture, and presents an efficient approach for grid energy storage and conversion.
基金supported by the National Natural Science Foundation of China (22090031, 22090030 and 21922501)the China Postdoctoral Science Foundation (2021M690319)。
基金support by the Natural Science Foundation of Shandong Province(No.ZR202103040753)the National Natural Science Foundation of China(No.22102086).
文摘Proton exchange membrane fuel cells(PEMFCs)have received a sustained world-wide attention owing to their promising applications based on clean energy.However,their widespread applications are still restricted by the sluggish oxygen reduction reaction(ORR)process.Over the past decades,significant efforts have been devoted to developing efficient ORR catalysts,which have been summarized in numerous previous reviews.Unfortunately,most of them mainly focused on ORR activity on the rotating disk electrode(RDE)level,which cannot truly represent the performance in real applications.Developing and showcasing efficient catalysts evaluated at the membrane electrode assembly(MEA)level is of vital importance.In this review,we first briefly showcased the recent development of ORR catalysts and then put more emphasis on the discussion of designing efficient catalysts at MEA and full-cell level,aiming to help stimulate more attention on their practical applications.
文摘Ferrocene and SOD-ferrocene modified gold electrodes were made by crosslinkage method with fress egg white and glutaraldehyde,and cyclic voltammetry was used to study these electrodes in phosphate buffer solution of different pH values and different concentrations of H2O2.The results indicated that in alkaline solution the cathodic response of ferroence was inhibited more greatly than the anodic response of ferrocene.The results also indicated that the cathodic peak current of ferrocene decreased rapidly while the anodic peak current decrased slightly with the addition of H2O2.But the ferrocene modified on the electrode was not lost,so we concluded that ferroence（+1）could be catalytic to the decomposition of H2O2.The behavior of SOD-ferrocene modified electrode indicated that SOD could prohibit the decrease of the peak current of ferrocene in the presence of H2O2.But with the increase of concentrations of H2O2 the peak currents of SOD-ferrocene modified electrode began to decrease too;and it could take on the same electrohehavior of ferrocene modified electrode when the concentrations of H2O2 are high enough.
