Promoting interfacial reaction kinetics is highly desirable for achieving high-performances of anode material in alkali-ion batteries.Herein,flower-like MoSe_(2)/MoO_(3-x)@r GO composites are fabricated by a facile so...Promoting interfacial reaction kinetics is highly desirable for achieving high-performances of anode material in alkali-ion batteries.Herein,flower-like MoSe_(2)/MoO_(3-x)@r GO composites are fabricated by a facile solvothermal method involving a thermal-treatment at 800°C.When evaluated as an anode material for potassium ion batteries,MoSe_(2)/MoO_(3-x)@r GO delivers 248.2 m A h g^(-1)after 50 cycles at 0.2 A g^(-1) with a capacity retention of 84.6%and 182.9 m A h g^(-1)after 150 cycles at 1.0 A g^(-1) with a capacity retention of almost 61.2%,superior to those of bare MoSe_(2)or MoSe_(2)@r GO composites.Analysis from electrochemical measurements,the amorphous MoO_(3-x)containing oxygen vacancies could not only effectively buffer the self-aggregation of MoSe_(2)nanosheets but also provides lots of accessible active sites for potassium ion storage.Additionally,the open channels in the amorphous MoO_(3-x) phase lead to easier ion hopping and smaller diffusion barriers.Furthermore,the built-in electric field at the interface would be beneficial for electron transfer and K-ion migration across the hetero-junction interface.Moreover,larger dielectric polarization induced by the high relative permittivity of amorphous MoO_(3-x) would reduce charge transfer resistance and enhance K-ion migration across electric double-layer.Our work provides new insight into the enhanced performance of anode material coated by an amorphous layer with large relative permittivity.展开更多
The design with intent(DwI)toolkit assists designers in creating novel designs and interfaces.DwI,however,is not constrained to any degree,making it impossible to know whether the produced designs adequately account f...The design with intent(DwI)toolkit assists designers in creating novel designs and interfaces.DwI,however,is not constrained to any degree,making it impossible to know whether the produced designs adequately account for users’needs.In contrast,cognitive work analysis(CWA)is a human factors research tool that seeks to map a system and account for users’needs,yet does not provide clear guidelines for progressing such analysis into workable designs with which users can interact.This paper seeks to present a proof-of-concept investigation to demonstrate that DwI can be suitably constrained and validated by insights gained from CWA.CWA,in turn,benefits by having a suitable toolkit for progressing insights.Two teams of individuals without design backgrounds were able to develop mock-up in-vehicle interfaces aimed at reducing fuel use.The teams were able to use DwI toolkit to articulate the genesis of their ideas,which in turn could be directly linked to system needs identified within CWA.展开更多
基金the Natural Science Foundations of China(Nos.12174057,22179020)Natural Science Foundation of Fuccccjian Province(No.2021L3011)Fujian Natural Science Foundation for Distinguished Young Scholars(No.2020J06042)。
文摘Promoting interfacial reaction kinetics is highly desirable for achieving high-performances of anode material in alkali-ion batteries.Herein,flower-like MoSe_(2)/MoO_(3-x)@r GO composites are fabricated by a facile solvothermal method involving a thermal-treatment at 800°C.When evaluated as an anode material for potassium ion batteries,MoSe_(2)/MoO_(3-x)@r GO delivers 248.2 m A h g^(-1)after 50 cycles at 0.2 A g^(-1) with a capacity retention of 84.6%and 182.9 m A h g^(-1)after 150 cycles at 1.0 A g^(-1) with a capacity retention of almost 61.2%,superior to those of bare MoSe_(2)or MoSe_(2)@r GO composites.Analysis from electrochemical measurements,the amorphous MoO_(3-x)containing oxygen vacancies could not only effectively buffer the self-aggregation of MoSe_(2)nanosheets but also provides lots of accessible active sites for potassium ion storage.Additionally,the open channels in the amorphous MoO_(3-x) phase lead to easier ion hopping and smaller diffusion barriers.Furthermore,the built-in electric field at the interface would be beneficial for electron transfer and K-ion migration across the hetero-junction interface.Moreover,larger dielectric polarization induced by the high relative permittivity of amorphous MoO_(3-x) would reduce charge transfer resistance and enhance K-ion migration across electric double-layer.Our work provides new insight into the enhanced performance of anode material coated by an amorphous layer with large relative permittivity.
基金funded by the UK Engineering and Physical Sciences Research Council(EPSRC)Grant EP/N022262/1“Green Adaptive Control for Future Interconnected Vehicles”(www.gactiv e.uk).
文摘The design with intent(DwI)toolkit assists designers in creating novel designs and interfaces.DwI,however,is not constrained to any degree,making it impossible to know whether the produced designs adequately account for users’needs.In contrast,cognitive work analysis(CWA)is a human factors research tool that seeks to map a system and account for users’needs,yet does not provide clear guidelines for progressing such analysis into workable designs with which users can interact.This paper seeks to present a proof-of-concept investigation to demonstrate that DwI can be suitably constrained and validated by insights gained from CWA.CWA,in turn,benefits by having a suitable toolkit for progressing insights.Two teams of individuals without design backgrounds were able to develop mock-up in-vehicle interfaces aimed at reducing fuel use.The teams were able to use DwI toolkit to articulate the genesis of their ideas,which in turn could be directly linked to system needs identified within CWA.
