Aqueous ammonium-ion batteries(AAIBs)showed great potential in large-scale energy storage systems due to their low-cost,ultrafast kinetics,plentiful resources,inherent security and environmental friendliness.Herein,th...Aqueous ammonium-ion batteries(AAIBs)showed great potential in large-scale energy storage systems due to their low-cost,ultrafast kinetics,plentiful resources,inherent security and environmental friendliness.Herein,the well-dispersed Zn_(3)V_(3)O_(8)nanorods and agglomerated MnV_(2)O_(4)nanoparticles were prepared and firstly used as anodes for AAIBs.The ultrafast reaction kinetics and NH_(4)^(+)diffusion kinetics of Zn_(3)V_(3)O_(8)were confirmed by systematically contrasting with MnV_(2)O_(4).Specifically,Zn_(3)V_(3)O_(8)delivered perfect cyclic performances with 82.6%capacity retention after 500 cycles.When coupled with theβ-MnO_(2)cathode,theβ-MnO_(2)//Zn_(3)V_(3)O_(8)full batteries submitted a maximum energy density of 86 Wh.kg^(-1)and a maximum power density of 677W.kg^(-1).The phase transformation from Zn_(3)V_(3)O_(8)to Zn_(3)(OH)_(2)V_(2)O_(7).2H_(2)O during the first charge process and the reversible building/breaking behaviors of hydrogen bonds during the NH_(4)^(+)insertion/extraction processes were discussed by ex situ technology analyses.Thus,the fresh perceptions on the phase transformation laws and the hydrogen bonds evolution mechanisms could enrich the fundamental understanding of the NH_(4)^(+)storage mechanism,and promote the development of the practical applications for Zn_(3)V_(3)O_(8)in aqueous ammonium-ion batteries.展开更多
基金financially supported by the National Nature Science Foundation of China(Nos.52171200 and52371211)Changsha Special Project(No.kh2301006)+2 种基金Hunan Provincial Innovation Foundation for Postgraduate(No.CX20211073)Natural Science Foundation of Hunan Province(No.2024JJ7145)the National Sustainable Development Innovation Demonstration Zone project(No.2022sfq09)。
文摘Aqueous ammonium-ion batteries(AAIBs)showed great potential in large-scale energy storage systems due to their low-cost,ultrafast kinetics,plentiful resources,inherent security and environmental friendliness.Herein,the well-dispersed Zn_(3)V_(3)O_(8)nanorods and agglomerated MnV_(2)O_(4)nanoparticles were prepared and firstly used as anodes for AAIBs.The ultrafast reaction kinetics and NH_(4)^(+)diffusion kinetics of Zn_(3)V_(3)O_(8)were confirmed by systematically contrasting with MnV_(2)O_(4).Specifically,Zn_(3)V_(3)O_(8)delivered perfect cyclic performances with 82.6%capacity retention after 500 cycles.When coupled with theβ-MnO_(2)cathode,theβ-MnO_(2)//Zn_(3)V_(3)O_(8)full batteries submitted a maximum energy density of 86 Wh.kg^(-1)and a maximum power density of 677W.kg^(-1).The phase transformation from Zn_(3)V_(3)O_(8)to Zn_(3)(OH)_(2)V_(2)O_(7).2H_(2)O during the first charge process and the reversible building/breaking behaviors of hydrogen bonds during the NH_(4)^(+)insertion/extraction processes were discussed by ex situ technology analyses.Thus,the fresh perceptions on the phase transformation laws and the hydrogen bonds evolution mechanisms could enrich the fundamental understanding of the NH_(4)^(+)storage mechanism,and promote the development of the practical applications for Zn_(3)V_(3)O_(8)in aqueous ammonium-ion batteries.
