PODCAST

▌PODCAST

	Tracking Electrolyte Breakdown in Real Time: Insights from Operando Spectroscopy on Li6PS5Cl \| ACS Energy Lett 2024/11/06｜ 00:19:02｜
	In Episode 5 of Electrochemistry with Elango, we explore groundbreaking research into the decomposition reactions within sulfide-based Li6PS5Cl solid electrolytes in solid-state batteries. Using an innovative approach with operando hard X-ray photoelectron spectroscopy (HAXPES), this study investigates the formation and dynamics of the solid electrolyte interphase (SEI) under varying voltages. By employing a thin nickel layer as the working electrode, researchers could closely observe the SEI’s layered microstructure and analyze the chemical transformations occurring during cycling. We’ll discuss the onset of decomposition reactions at 1.75 V and the significant Li₂S formation between 1.5–1.0 V, as well as the reversibility observed as these species decompose and oxidize in higher voltage ranges. This episode sheds light on the stability challenges of sulfide electrolytes and provides a detailed look at how SEI composition affects battery performance and longevity. For those interested in understanding electrolyte decomposition mechanisms in advanced batteries, this episode is essential listening. Source: https://doi.org/10.1021/acsenergylett.4c01072

	Managing Volume Swings in Li₂S-Based Electrodes: The Role of Pressure in Battery Performance\| CHEM MATER 2024/11/06｜ 00:10:28｜
	In Episode 4 of Electrochemistry with Elango, we delve into a significant challenge in all-solid-state lithium/sulfur (Li/S) batteries: the dynamic volume changes in Li₂S-based composite positive electrodes and how stacking pressure impacts their capacity and stability. As Li₂S is converted to sulfur during charging, it experiences a dramatic 45% shrinkage, leading to a loss of particle contact and eventual mechanical degradation over cycles. This study uses in situ scanning electron microscopy to capture these volume shifts in real time, providing a clearer understanding of how they affect battery performance. We’ll discuss the correlation between charge-discharge capacities and stack pressure, highlighting how optimized stacking pressure could help mitigate deterioration. Additionally, the study explores Li4Ti5O12 as a stable counter electrode and discusses promising negative electrode candidates for full-cell applications. Join us as we uncover strategies for enhancing the durability and efficiency of all-solid-state Li/S batteries, making strides toward safer, high-capacity energy storage solutions. Source: https://doi.org/10.1021/acs.chemmater.4c01514

	Choosing the Right Mix: Compatibility of Halide and Sulfide Electrolytes in Solid-State Batteries\| ACS Energy Lett 2024/11/06｜ 00:15:59｜
	In this episode of Electrochemistry with Elango, we explore the chemical compatibility of halide solid electrolytes (HSEs) with sulfide solid electrolytes (SSEs) in all-solid-state batteries (ASSBs). While HSEs offer high oxidative stability for high-voltage cathodes, their reduced stability with lithium metal necessitates pairing them with SSEs like Li6PS5Cl in bilayer separators. But what happens when these two electrolytes interact? Using advanced techniques like operando electrochemical impedance spectroscopy, temperature-dependent X-ray diffraction, and X-ray photoelectron spectroscopy, this study examines how the central metal of HSEs influences reactivity with SSEs, affecting cell performance. We’ll discuss how metals like Li3InCl6 and Li2ZrCl6 show high reactivity, while others such as Li3YCl6, Li3ScCl6, and Li3ErCl6 exhibit stability—key insights for choosing optimal HSE-SSE pairs in ASSBs. This episode provides a practical framework for designing stable, high-performance batteries with balanced electrolyte interfaces. If you’re invested in solid-state battery innovation and electrolyte compatibility, this discussion is essential listening!

	Unlocking Stability in Sulfide Solid Electrolytes: Multiphase SEI Growth and Kinetics\| Joule 2024/11/06｜ 00:13:50｜
	In this episode of Electrochemistry with Elango, we dive into the complexities of multiphase SEI (solid-electrolyte interphase) growth in sulfide-based solid electrolytes—a key challenge in advancing lithium metal anodes for solid-state batteries (SSBs). This study introduces a novel approach to simulate and quantify SEI degradation on sulfide solid electrolytes, providing critical insights into ionic and electronic conductivity at the Li\|SE interface. We discuss how a Wagner-type diffusion model sheds light on SEI growth kinetics, as well as design guidelines that could enable improved long-term stability. By exploring transport properties like ionic and electronic conductivity (σion and σel) in Li6PS5Cl-based SEIs, we uncover how these findings contribute to a more accurate understanding of SEI behavior and inform the future design of solid-state battery materials. If you’re interested in the science behind battery stability and interface optimization, this episode is packed with insights you won’t want to miss!

	Measuring SEI Growth on Lithium Metal Anodes: A New Method for Solid-State Batteries \| Nat. Comm 2024/11/06｜ 00:13:27｜
	In this episode of Electrochemistry with Elango, we explore a novel electrochemical method designed to measure SEI (solid-electrolyte interphase) growth and parasitic reactions on lithium metal anodes—essential for advancing solid-state battery technology. Discover how this cutting-edge technique enables precise analysis of charge consumption and side reactions on active metal surfaces, shedding light on critical issues like dendritic lithium growth and dead lithium formation. Join us as we break down the study’s experimental approach using an anode-free cell configuration and the exciting potential of this method for a range of battery chemistries. Whether you’re interested in battery science, electrochemistry, or sustainable energy, this episode offers key insights into a tool that could shape the future of lithium metal batteries and beyond

	Tracking Electrolyte Breakdown in Real Time: Insights from Operando Spectroscopy on Li6PS5Cl \| ACS Energy Lett 2024/11/06｜ 00:19:02｜
	In Episode 5 of Electrochemistry with Elango, we explore groundbreaking research into the decomposition reactions within sulfide-based Li6PS5Cl solid electrolytes in solid-state batteries. Using an innovative approach with operando hard X-ray photoelectron spectroscopy (HAXPES), this study investigates the formation and dynamics of the solid electrolyte interphase (SEI) under varying voltages. By employing a thin nickel layer as the working electrode, researchers could closely observe the SEI’s layered microstructure and analyze the chemical transformations occurring during cycling. We’ll discuss the onset of decomposition reactions at 1.75 V and the significant Li₂S formation between 1.5–1.0 V, as well as the reversibility observed as these species decompose and oxidize in higher voltage ranges. This episode sheds light on the stability challenges of sulfide electrolytes and provides a detailed look at how SEI composition affects battery performance and longevity. For those interested in understanding electrolyte decomposition mechanisms in advanced batteries, this episode is essential listening. Source: https://doi.org/10.1021/acsenergylett.4c01072

	Managing Volume Swings in Li₂S-Based Electrodes: The Role of Pressure in Battery Performance\| CHEM MATER 2024/11/06｜ 00:10:28｜
	In Episode 4 of Electrochemistry with Elango, we delve into a significant challenge in all-solid-state lithium/sulfur (Li/S) batteries: the dynamic volume changes in Li₂S-based composite positive electrodes and how stacking pressure impacts their capacity and stability. As Li₂S is converted to sulfur during charging, it experiences a dramatic 45% shrinkage, leading to a loss of particle contact and eventual mechanical degradation over cycles. This study uses in situ scanning electron microscopy to capture these volume shifts in real time, providing a clearer understanding of how they affect battery performance. We’ll discuss the correlation between charge-discharge capacities and stack pressure, highlighting how optimized stacking pressure could help mitigate deterioration. Additionally, the study explores Li4Ti5O12 as a stable counter electrode and discusses promising negative electrode candidates for full-cell applications. Join us as we uncover strategies for enhancing the durability and efficiency of all-solid-state Li/S batteries, making strides toward safer, high-capacity energy storage solutions. Source: https://doi.org/10.1021/acs.chemmater.4c01514

	Choosing the Right Mix: Compatibility of Halide and Sulfide Electrolytes in Solid-State Batteries\| ACS Energy Lett 2024/11/06｜ 00:15:59｜
	In this episode of Electrochemistry with Elango, we explore the chemical compatibility of halide solid electrolytes (HSEs) with sulfide solid electrolytes (SSEs) in all-solid-state batteries (ASSBs). While HSEs offer high oxidative stability for high-voltage cathodes, their reduced stability with lithium metal necessitates pairing them with SSEs like Li6PS5Cl in bilayer separators. But what happens when these two electrolytes interact? Using advanced techniques like operando electrochemical impedance spectroscopy, temperature-dependent X-ray diffraction, and X-ray photoelectron spectroscopy, this study examines how the central metal of HSEs influences reactivity with SSEs, affecting cell performance. We’ll discuss how metals like Li3InCl6 and Li2ZrCl6 show high reactivity, while others such as Li3YCl6, Li3ScCl6, and Li3ErCl6 exhibit stability—key insights for choosing optimal HSE-SSE pairs in ASSBs. This episode provides a practical framework for designing stable, high-performance batteries with balanced electrolyte interfaces. If you’re invested in solid-state battery innovation and electrolyte compatibility, this discussion is essential listening!

	Unlocking Stability in Sulfide Solid Electrolytes: Multiphase SEI Growth and Kinetics\| Joule 2024/11/06｜ 00:13:50｜
	In this episode of Electrochemistry with Elango, we dive into the complexities of multiphase SEI (solid-electrolyte interphase) growth in sulfide-based solid electrolytes—a key challenge in advancing lithium metal anodes for solid-state batteries (SSBs). This study introduces a novel approach to simulate and quantify SEI degradation on sulfide solid electrolytes, providing critical insights into ionic and electronic conductivity at the Li\|SE interface. We discuss how a Wagner-type diffusion model sheds light on SEI growth kinetics, as well as design guidelines that could enable improved long-term stability. By exploring transport properties like ionic and electronic conductivity (σion and σel) in Li6PS5Cl-based SEIs, we uncover how these findings contribute to a more accurate understanding of SEI behavior and inform the future design of solid-state battery materials. If you’re interested in the science behind battery stability and interface optimization, this episode is packed with insights you won’t want to miss!

	Measuring SEI Growth on Lithium Metal Anodes: A New Method for Solid-State Batteries \| Nat. Comm 2024/11/06｜ 00:13:27｜
	In this episode of Electrochemistry with Elango, we explore a novel electrochemical method designed to measure SEI (solid-electrolyte interphase) growth and parasitic reactions on lithium metal anodes—essential for advancing solid-state battery technology. Discover how this cutting-edge technique enables precise analysis of charge consumption and side reactions on active metal surfaces, shedding light on critical issues like dendritic lithium growth and dead lithium formation. Join us as we break down the study’s experimental approach using an anode-free cell configuration and the exciting potential of this method for a range of battery chemistries. Whether you’re interested in battery science, electrochemistry, or sustainable energy, this episode offers key insights into a tool that could shape the future of lithium metal batteries and beyond