Understanding the charge/discharge mechanism of batteries plays an important role in the development of high-performance systems,but extremely complicated reactions are involved.Because these complex phenomena are als...Understanding the charge/discharge mechanism of batteries plays an important role in the development of high-performance systems,but extremely complicated reactions are involved.Because these complex phenomena are also bottlenecks for the establishment of all-sol id-state batteries(ASSB),we conducted multi-scale analysis using combined multi-measurement techniques,to directly observe charge/discharge reactions at hierarchical scales for the oxide-type ASSB using Na as the carrier cation.In particular,all of measurement techniques are applied to cross-section ASSB in the same cell,to complementarily evaluate the elemental distributions and structural changes.From Operando scanning electron microscopy-energy-dispersive X-ray spectroscopy,the Na concentration in the electrode layers changes on the micrometer scale under charge/discharge reactions in the first cycle.Furthermore,Operando Raman spectroscopy reveal changes in the bonding states at the atomic scale in the active material,including changes in reversible structural changes.After cycling the ASSB,the elemental distributions are clearly observed along with the particle shapes and can reveal the Na migration mechanism at the nanometer scale,by time-of-flight secondary ion mass spectrometry.Therefore,this study can provide a fundamental and comprehensive understanding of the charge/discharge mechanism by observing reaction processes at multiple scales.展开更多
1 Results Room-temperature Ionic liquids (RTILs) are special class of compounds, where a combination of cations and anions produces neutral, stable and viscous liquids with high ionic conductivity. Widely spread appli...1 Results Room-temperature Ionic liquids (RTILs) are special class of compounds, where a combination of cations and anions produces neutral, stable and viscous liquids with high ionic conductivity. Widely spread applications are proposed to use conductors, electrolytes, clean solvents and others. Especially, RTILs are expected to be safe electrolytes in the ion-lithium batteries. In this study, NMR methods are used to clarify the basic properties of the individual movements of the anions and cations of ...展开更多
基金This article is based on results obtained from a project,Grant JPNP14004,commissioned by the New Energy and Industrial Technology Development Organization(NEDO)。
文摘Understanding the charge/discharge mechanism of batteries plays an important role in the development of high-performance systems,but extremely complicated reactions are involved.Because these complex phenomena are also bottlenecks for the establishment of all-sol id-state batteries(ASSB),we conducted multi-scale analysis using combined multi-measurement techniques,to directly observe charge/discharge reactions at hierarchical scales for the oxide-type ASSB using Na as the carrier cation.In particular,all of measurement techniques are applied to cross-section ASSB in the same cell,to complementarily evaluate the elemental distributions and structural changes.From Operando scanning electron microscopy-energy-dispersive X-ray spectroscopy,the Na concentration in the electrode layers changes on the micrometer scale under charge/discharge reactions in the first cycle.Furthermore,Operando Raman spectroscopy reveal changes in the bonding states at the atomic scale in the active material,including changes in reversible structural changes.After cycling the ASSB,the elemental distributions are clearly observed along with the particle shapes and can reveal the Na migration mechanism at the nanometer scale,by time-of-flight secondary ion mass spectrometry.Therefore,this study can provide a fundamental and comprehensive understanding of the charge/discharge mechanism by observing reaction processes at multiple scales.
文摘1 Results Room-temperature Ionic liquids (RTILs) are special class of compounds, where a combination of cations and anions produces neutral, stable and viscous liquids with high ionic conductivity. Widely spread applications are proposed to use conductors, electrolytes, clean solvents and others. Especially, RTILs are expected to be safe electrolytes in the ion-lithium batteries. In this study, NMR methods are used to clarify the basic properties of the individual movements of the anions and cations of ...
