Seawater batteries are attracting continuous attention because seawater as an electrolyte is inexhaustible,eco-friendly,and free of charge.However,the rechargeable seawater batteries developed nowadays show poor rever...Seawater batteries are attracting continuous attention because seawater as an electrolyte is inexhaustible,eco-friendly,and free of charge.However,the rechargeable seawater batteries developed nowadays show poor reversibility and short cycle life,due to the very limited electrode materials and complicated yet inappropriate working mechanism.Here,we propose a rechargeable seawater battery that works through a rocking-chair mechanism encountered in commercial lithium ion batteries,enabled by intercalation-type inorganic electrode materials of open-framework-type cathode and Na-ion conducting membrane-type anode.The rechargeable seawater battery achieves a high specific energy of 80.0 Wh/kg at 1,226.9 W/kg and a high specific power of 7,495.0 W/kg at 23.7 Wh/kg.Additionally,it exhibits excellent cycling stability,retaining 66.3%of its capacity over 1,000 cycles.This work represents a promising avenue for developing sustainable aqueous batteries withlow costs.展开更多
基金supported by the Hainan Province Science and Technology Special Fund(No.ZDYF20-23GXJS148)the National Natural Science Foundation of China(No.52362030).
文摘Seawater batteries are attracting continuous attention because seawater as an electrolyte is inexhaustible,eco-friendly,and free of charge.However,the rechargeable seawater batteries developed nowadays show poor reversibility and short cycle life,due to the very limited electrode materials and complicated yet inappropriate working mechanism.Here,we propose a rechargeable seawater battery that works through a rocking-chair mechanism encountered in commercial lithium ion batteries,enabled by intercalation-type inorganic electrode materials of open-framework-type cathode and Na-ion conducting membrane-type anode.The rechargeable seawater battery achieves a high specific energy of 80.0 Wh/kg at 1,226.9 W/kg and a high specific power of 7,495.0 W/kg at 23.7 Wh/kg.Additionally,it exhibits excellent cycling stability,retaining 66.3%of its capacity over 1,000 cycles.This work represents a promising avenue for developing sustainable aqueous batteries withlow costs.
