【摘 要】
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Dual-ion batteries (DIBs) have attracted immense interest as a new generation of energy storage device due to their low cost,environmental friendliness and high
【机 构】
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Key Laboratory of Polyoxometalate Science of the Ministry of Education and Faculty of Chemistry, Nor
论文部分内容阅读
Dual-ion batteries (DIBs) have attracted immense interest as a new generation of energy storage device due to their low cost,environmental friendliness and high working voltage.However,developing DIBs using organic compounds as active electrode materials is in its infancy.Herein,we first report a bipolar and self-polymerized Cu phthalocyanine (CuTAPc) as an electrode material for sodium-based DIBs (SDIBs).Benefitting from the bipolar property,CuTAPc could serve as the cathode or anode material to construct metal sodium-based or metal sodium-free SDIB (cell 1 or 2) by coupling with sodium anode or graphite cathode,respectively.As a result,cell 1 displays a high discharge capacity of 195.7 rnAh g-1 at 50 mA g-1 and a high reversible capacity of 57 mAh g-1 over 2500 cycles at 1 A g-1,and cell 2 shows a high energy density of 324 Wh kg-1 and a high power density of 7481 W kg-1.Subsequently,the proposed binding mechanism and the bipolar reactivity of CuTAPc have been revealed by the detailed reaction kinetic analysis and ex-situ techniques as well as the density functional theory (DFT) calculations.This work could open a pathway to develop the advanced SDIBs constructed by elemental abundant and environmentally friendly organic materials.
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