Thermally-driven reactivity of Li_0.35La_0.55TiO₃solid electrolyte with LiCoO₂cathode

Abstract

A critical bottleneck for developing successful solid-state batteries is minimizing the interfacial impedances between the solid electrolyte and the active electrode materials. Advancing our understanding of the chemically and electro-chemically...

Fluorinated carbon encapsulated NiO cluster/TiO2 nanotubes as a robust photocatalyst for hydrogen evolution

“…7d) was performed by using Zview soware, where R s represents the electrolyte solution resistance, and R ct is the charge-transfer resistance and CPE indicates the double layer capacitance. [45][46][47] The semicircular Nyquist curve radius reects the charge transfer capacity. 44,45 This radius decreases in the order of TiO 2 nanotubes (9.6 kU), NT-1 (4.0 kU) and FNT-1 (1.74 kU), implying a decrease in the charge transfer resistance at the electrode/electrolyte interface.…”

Unveiling crystal orientation-dependent interface property in composite cathodes for solid-state batteries by in situ microscopic probe

“…A crystal orientation-controlled NCM/LLTO model system The perovskite-type LLTO is one of the most widely-studied solid electrolytes for its high ionic conductivity (10 − 4 ~10 − 3 S cm − 1 ) and chemical stability with high oxidation potential, thus was chosen for this investigation 11,21,22 . In the standard process of fabricating composite cathodes for ASSBs, a mixture of solid electrolyte and cathode active powders is co-sintered at high temperatures.…”

“…This nding underscores a previously unrecognized link between the interfacial resistance and crystal orientation-dependent thermal reactions in composite cathodes. Moreover, they imply that the varying onset temperatures of thermal degradation reported in earlier studies of composite cathodes may have resulted from a mix of different reaction onsets across various crystallographic planes 17,[19][20][21] .…”

“…Moreover, these approaches are not eligible for oxide-based electrolytes (e.g., perovskite, NASICON, and garnet-type electrolytes) 2,[9][10][11][12] , which are typically rigid and fragile. The brittle mechanical properties of oxide electrolytes inherently result in inferior interfacial contact between particles in composite cathodes when fabricated at ambient temperature [13][14][15][16] , thus requiring co-sintering process at high temperatures (e.g., above 1000 ℃ with the garnet-type [14][15][16][17] , NASICON solid electrolyte [18][19][20] , and perovskite 21,22 ). However, these high-temperature treatments often exacerbate unwanted reactions at the interface, such as cation interdiffusion, interphase formation, and decomposition of coating materials, subsequently leading to a high-resistance interface.…”

“…However, these high-temperature treatments often exacerbate unwanted reactions at the interface, such as cation interdiffusion, interphase formation, and decomposition of coating materials, subsequently leading to a high-resistance interface. While numerous efforts have been made to optimize the processing conditions to mitigate the trade-off between sintering and side reactions, the results have been inconsistent and often limited in success even for identical materials [18][19][20][21][22][23][24] .…”