Sodium batteries(SBs)have obtained increasing attention due to their low cost and abundant resources[1].Although SBs are usually viewed to sacrifice energy density,it is still possible for low-cost SBs to achieve a hi...Sodium batteries(SBs)have obtained increasing attention due to their low cost and abundant resources[1].Although SBs are usually viewed to sacrifice energy density,it is still possible for low-cost SBs to achieve a high energy density comparable to corresponding lithium batteries.The anode-free battery does not use anode-active materials,which relies on the electrochemical deposition of alkali metals directly onto the current collector surface.Thus,such kind of battery can achieve higher battery voltage,reduce battery costs,and also increase energy density(Fig.1a)[2].Nevertheless,anode-free batteries usually exhibit poor reversibility and cannot achieve sufficient reversible cycling.展开更多
文摘Sodium batteries(SBs)have obtained increasing attention due to their low cost and abundant resources[1].Although SBs are usually viewed to sacrifice energy density,it is still possible for low-cost SBs to achieve a high energy density comparable to corresponding lithium batteries.The anode-free battery does not use anode-active materials,which relies on the electrochemical deposition of alkali metals directly onto the current collector surface.Thus,such kind of battery can achieve higher battery voltage,reduce battery costs,and also increase energy density(Fig.1a)[2].Nevertheless,anode-free batteries usually exhibit poor reversibility and cannot achieve sufficient reversible cycling.
