Sundeep Vema
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View article: Locating Impurity Phases in the Lithium-Ion Conductor Al-Doped Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> through Dynamic Nuclear Polarization and Nuclear Magnetic Resonance Spectroscopy
Locating Impurity Phases in the Lithium-Ion Conductor Al-Doped Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> through Dynamic Nuclear Polarization and Nuclear Magnetic Resonance Spectroscopy Open
An understanding of the nature of the grain boundaries and impurity phases contained in complex mixed metal oxide solid electrolytes is key to the development of improved and more stable solid-state batteries with reduced grain boundary re…
View article: Contact loss in all solid-state Li-ion batteries via deposition of impurities
Contact loss in all solid-state Li-ion batteries via deposition of impurities Open
Solid-state batteries promise high energy storage with enhanced safety but suffer from contact loss at the lithium (Li) metal anode-solid electrolyte interface as Li is stripped into the ionically-conducting solid electrolyte. Contrary to …
View article: Void growth in the lithium anode of a solid state battery
Void growth in the lithium anode of a solid state battery Open
View article: Locating the impurity phases in the lithium-ion conductor Al-doped Li7La3Zr2O12 through dynamic nuclear polarization and nuclear magnetic resonance spectroscopy
Locating the impurity phases in the lithium-ion conductor Al-doped Li7La3Zr2O12 through dynamic nuclear polarization and nuclear magnetic resonance spectroscopy Open
An understanding of the nature of the grain boundaries and impurity phases contained in complex mixed metal oxide solid electrolytes is key to the development of improved and more stable solid-state batteries with reduced grain boundary re…
View article: Cation-ordering in low-temperature niobium-rich NbWO bronzes: New anodes for high rate Li-ion batteries
Cation-ordering in low-temperature niobium-rich NbWO bronzes: New anodes for high rate Li-ion batteries Open
Niobium tungsten oxide phases, as anodes for lithium-ion batteries, have gained considerable attention due to their high volumetric charge storage densities at high rates. Here we report the microwave-assisted solution-based synthesis and …
View article: Clarifying the Dopant Local Structure and Effect on Ionic Conductivity in Garnet Solid-State Electrolytes for Lithium-Ion Batteries
Clarifying the Dopant Local Structure and Effect on Ionic Conductivity in Garnet Solid-State Electrolytes for Lithium-Ion Batteries Open
The high Li-ion conductivity and wide electrochemical stability of Li-rich garnets (Li7La3Zr2O12) make them one of the leading solid electrolyte candidates for solid-state batteries. Dopants such as Al and Ga are typically used to enable s…
View article: The strength of a constrained lithium layer
The strength of a constrained lithium layer Open
A constrained compression test is developed to replicate the mechanical state of a lithium filament within a solid state battery. Lithium microspheres are compressed between parallel quartz plates into a pancake shape of thickness on the o…
View article: Clarifying the local structure of dopants in garnet solid-state electrolytes for lithium-ion batteries
Clarifying the local structure of dopants in garnet solid-state electrolytes for lithium-ion batteries Open
The high Li-ion conductivity and wide electrochemical stability of Li-rich garnets (Li7La3Zr2O12) make them one of the leading solid electrolyte candidates for solid-state batteries. Dopants such as Al and Ga are typically used to enable s…
View article: Understanding the Surface Regeneration and Reactivity of Garnet Solid-State Electrolytes
Understanding the Surface Regeneration and Reactivity of Garnet Solid-State Electrolytes Open
Garnet solid-electrolyte-based Li-metal batteries can be used in energy storage devices with high energy densities and thermal stability. However, the tendency of garnets to form lithium hydroxide and carbonate on the surface in an ambient…
View article: Mapping structure heterogeneities and visualizing moisture degradation of perovskite films with nano-focus WAXS
Mapping structure heterogeneities and visualizing moisture degradation of perovskite films with nano-focus WAXS Open
View article: Forced Disorder in the Solid Solution Li<sub>3</sub>P–Li<sub>2</sub>S: A New Class of Fully Reduced Solid Electrolytes for Lithium Metal Anodes
Forced Disorder in the Solid Solution Li<sub>3</sub>P–Li<sub>2</sub>S: A New Class of Fully Reduced Solid Electrolytes for Lithium Metal Anodes Open
All-solid-state batteries based on non-combustible solid electrolytes are promising candidates for safe energy storage systems. In addition, they offer the opportunity to utilize metallic lithium as an anode. However, it has proven to be a…
View article: Effect of Lithiation upon the Shear Strength of NMC811 Single Crystals
Effect of Lithiation upon the Shear Strength of NMC811 Single Crystals Open
An experimental protocol is developed to measure the shear strength of NMC811 single crystals within the cathode of a lithium-ion cell. The cathode is placed upon a set of thick metallic substrates that possess a wide range of indentation …
View article: Correction: Investigating the effect of a fluoroethylene carbonate additive on lithium deposition and the solid electrolyte interphase in lithium metal batteries using <i>in situ</i> NMR spectroscopy
Correction: Investigating the effect of a fluoroethylene carbonate additive on lithium deposition and the solid electrolyte interphase in lithium metal batteries using <i>in situ</i> NMR spectroscopy Open
Correction for ‘Investigating the effect of a fluoroethylene carbonate additive on lithium deposition and the solid electrolyte interphase in lithium metal batteries using in situ NMR spectroscopy’ by Anna B. Gunnarsdóttir et al., J. Mater…
View article: Investigating the effect of a fluoroethylene carbonate additive on lithium deposition and the solid electrolyte interphase in lithium metal batteries using <i>in situ</i> NMR spectroscopy
Investigating the effect of a fluoroethylene carbonate additive on lithium deposition and the solid electrolyte interphase in lithium metal batteries using <i>in situ</i> NMR spectroscopy Open
An in situ NMR study of Li deposition and the SEI on Li metal. Isotope exchange measurements reveal the fast transport properties in the SEI formed with FEC and the accelerated SEI formation rate, in part explaining the homogeneous electro…