High volume energy density(Ev)means more energy can be stored in a small space,which helps ease the“space anxiety”faced by electrochemical energy storage(EES)devices such as batteries.Lithium-sulfur batteries(LSBs)a...High volume energy density(Ev)means more energy can be stored in a small space,which helps ease the“space anxiety”faced by electrochemical energy storage(EES)devices such as batteries.Lithium-sulfur batteries(LSBs)are promising next-generation EES devices due to their high theoretical energy density.However,its E_(v) is unsatisfactory due to the low density of sulfur and excess use of lightweight nanocarbon in the cathode,severely limiting its practical applications.In this review,the recent progress in improving the E_(v) is summarized from the aspects of materials,electrodes,and devices.First,the key factors affecting E_(v) are discussed.Then at the material level,the design of materials with high density and rich pore structure,and the key roles of catalysts are discussed.At the electrode level,the design of the compact electrode structure is summarized.Increasing the thickness of the cathodes or reducing the use of the anodes(low N/P ratio)to improve E_(v) from the device level is highlighted.Finally,the E_(v) of solid-state LSBs system has been prospected.展开更多
Newly developed copper-iodide cluster microcubes offer a solution to the issues commonly faced by powder scintillation screens.These problems include inadequate scintillation performance and significant light scatteri...Newly developed copper-iodide cluster microcubes offer a solution to the issues commonly faced by powder scintillation screens.These problems include inadequate scintillation performance and significant light scattering,resulting in poor image quality.With the advent of monodisperse copper-iodide cluster microparticle scintillators,efficient and long-term stable scintillation is achieved,while ensuring biocompatibility.Moreover,they enable highresolution static and dynamic X-ray imaging,providing high image quality.展开更多
Single-atom catalysts(SACs)are promising in some reactions typically promoted by homogeneous catalysts.However,the leaching of active species from the support in liquid-phase reactions hinders their potential applicat...Single-atom catalysts(SACs)are promising in some reactions typically promoted by homogeneous catalysts.However,the leaching of active species from the support in liquid-phase reactions hinders their potential applications.Herein,taking the hydroformylation reaction as an example,we report ionic liquid(IL)-induced stabilization of single Rh atoms against leaching.Among the ILs examined.展开更多
基金supported by the Ministry of Education,Singapore(MOE2019-T2-1-093 and MOE-T2EP10122-0002)the Energy Market Authority of Singapore(EMA-EP009-SEGC-020)+1 种基金the Agency for Science,Technology and Research(U2102d2004 and U2102d2012)the National Research Foundation Singapore(NRF-CRP26-2021RS-0002).
基金the National Key R&D Program of China(grant no.2021YFF0500600)National Natural Science Foundation of China(grant nos.51932005 and 52022041)+4 种基金Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(grant no.2017BT01N111)Guangdong Basic and Applied Basic Research Foundation(grant no.2021B1515120079)All-Solid-State Lithium Battery Electrolyte Engineering Research Centre(grant no.XMHT20200203006)Shenzhen Science and Technology Program(grant no.JCYJ20220818101008018)Haihe Laboratory of Sustainable Chemical Transformations and the Fundamental Research Funds for the Central Universities。
文摘High volume energy density(Ev)means more energy can be stored in a small space,which helps ease the“space anxiety”faced by electrochemical energy storage(EES)devices such as batteries.Lithium-sulfur batteries(LSBs)are promising next-generation EES devices due to their high theoretical energy density.However,its E_(v) is unsatisfactory due to the low density of sulfur and excess use of lightweight nanocarbon in the cathode,severely limiting its practical applications.In this review,the recent progress in improving the E_(v) is summarized from the aspects of materials,electrodes,and devices.First,the key factors affecting E_(v) are discussed.Then at the material level,the design of materials with high density and rich pore structure,and the key roles of catalysts are discussed.At the electrode level,the design of the compact electrode structure is summarized.Increasing the thickness of the cathodes or reducing the use of the anodes(low N/P ratio)to improve E_(v) from the device level is highlighted.Finally,the E_(v) of solid-state LSBs system has been prospected.
文摘Newly developed copper-iodide cluster microcubes offer a solution to the issues commonly faced by powder scintillation screens.These problems include inadequate scintillation performance and significant light scattering,resulting in poor image quality.With the advent of monodisperse copper-iodide cluster microparticle scintillators,efficient and long-term stable scintillation is achieved,while ensuring biocompatibility.Moreover,they enable highresolution static and dynamic X-ray imaging,providing high image quality.
基金from the Singapore National Research Foundation(ANR-17-CE06-001701 and WBS:R-279-000-530-281)for their finiancial support.The XAS were collected at the beamline BL01B1 at the SPring-8(Japan Synchrotron Radiation Research Institute,Hyogo,Japan)under the approval of JASRI(Proposal No.2019A1398).Q.H.thanks the NRF Fellowship(NRF-NRFF11-2019-0002)from the National Research Foundation of Singapore.M.G.and J.H.acknowledge the MEXT Project of Integrated Research Consortium on Chemical Science(IRCCS),the Photoexcitonix Project at Hokkaido University,and JSPS KAKENHI(JP20K05217).Some of the computations were performed at RCCS(Okazaki,Japan).
文摘Single-atom catalysts(SACs)are promising in some reactions typically promoted by homogeneous catalysts.However,the leaching of active species from the support in liquid-phase reactions hinders their potential applications.Herein,taking the hydroformylation reaction as an example,we report ionic liquid(IL)-induced stabilization of single Rh atoms against leaching.Among the ILs examined.
