High-Temperature Thermal Reactivity and Interface Evolution of the NMC-LATP-Carbon Composite Cathode.

Temperature-assisted densification methods are typically used in oxide-based solid-state batteries to suppress resistive interfaces. However, chemical reactivity among the different cathode components (which include a catholyte, the conducting additive, and the electroactive material) still represents a major challenge and processing parameters need thus to be carefully selected. In this study, we evaluate the impact of temperature and heating atmosphere in the LiNiMnCoO (NMC), LiAlTiPO (LATP), and Ketjenblack (KB) system.

New Insights on the Origin of Chemical Instabilities Between Poly(carbonate)-based Polymer and Li-containing Inorganic Materials.

Composite electrolytes, owing to their ability to combine both polymeric and ceramic properties are promising candidates for Solid-State-Batteries (SSBs). In this paper, we assess the effect of ceramic fillers (Li Al Ti P O , Li Ga La Zr O and Al O ) in a poly(ethylene oxide carbonate)-LiTFSI matrix. First, the role of the filler chemistry on thermal and electrochemical properties is evaluated: reduced polymer crystallinity leads to an increased ionic conductivity at low temperatures; and the ionic conductivity at low temperatures (<30 °C) is improved for LLZO filler particles.

Unveiling Interfacial Li-Ion Dynamics in LiLaZrO/PEO(LiTFSI) Composite Polymer-Ceramic Solid Electrolytes for All-Solid-State Lithium Batteries.

Unlocking the full potential of solid-state electrolytes (SSEs) is key to enabling safer and more-energy dense technologies than today's Li-ion batteries. In particular, composite materials comprising a conductive, flexible polymer matrix embedding ceramic filler particles are emerging as a good strategy to provide the combination of conductivity and mechanical and chemical stability demanded from SSEs. However, the electrochemical activity of these materials strongly depends on their polymer/ceramic interfacial Li-ion dynamics at the molecular scale, whose fundamental understanding remains elusive.

Designing Spinel LiTiO Electrode as Anode Material for Poly(ethylene)oxide-Based Solid-State Batteries.

The development of a promising Li metal solid-state battery (SSB) is currently hindered by the instability of Li metal during electrodeposition; which is the main cause of dendrite growth and cell failure at elevated currents. The replacement of Li metal anode by spinel LiTiO (LTO) in SSBs would avoid such problems, endowing the battery with its excellent features such as long cycling performance, high safety and easy fabrication. In the present work, we provide an evaluation of the electrochemical properties of poly(ethylene)oxide (PEO)-based solid-state batteries using LTO as the active material.

Investigating the Dendritic Growth during Full Cell Cycling of Garnet Electrolyte in Direct Contact with Li Metal.

All-solid-state batteries including a garnet ceramic as electrolyte are potential candidates to replace the currently used Li-ion technology, as they offer safer operation and higher energy storage performances. However, the development of ceramic electrolyte batteries faces several challenges at the electrode/electrolyte interfaces, which need to withstand high current densities to enable competing C-rates. In this work, we investigate the limits of the anode/electrolyte interface in a full cell that includes a Li-metal anode, LiFePO cathode, and garnet ceramic electrolyte.