Effect of surface carbonates on the cyclability of LiNbO3-coated NCM622 in all-solid-state batteries with lithium thiophosphate electrolytes

While still premature as an energy storage technology, bulk solid-state batteries are attracting much attention in the academic and industrial communities lately. In particular, layered lithium metal oxides and lithium thiophosphates hold promise as cathode materials and superionic solid electrolytes, respectively. However, interfacial side reactions between the individual components during battery operation usually result in accelerated performance degradation. Hence, effective surface coatings are required to mitigate or ideally prevent detrimental reactions from occurring and having an impact on the cyclability. In the present work, we examine how surface carbonates incorporated into the sol–gel-derived LiNbO3 protective coating on NCM622 [Li1+x(Ni0.6Co0.2Mn0.2)1–xO2] cathode material affect the efficiency and rate capability of pellet-stack solid-state battery cells with β-Li3PS4 or argyrodite Li6PS5Cl solid electrolyte and a Li4Ti5O12 anode. Our research data indicate that a hybrid coating may in fact be beneficial to the kinetics and the cycling performance strongly depends on the solid electrolyte used.

Selectivity switching resulting in the formation of benzene by surface carbonates on ceria in catalytic gas-phase oxidation of benzyl alcohol

The carbonate deposits on CeO2 cause the formation of benzene in gas-phase aerobic oxidation of benzyl alcohol via easy trapping of CO fragments.

An Infrared Spectroscopic Flow Reactor for in Situ Studies of Heterogeneous Catalytic Reactions at High Temperature and the Reactions of CO2 and Benzyl Benzoate on Alumina

A simple infrared spectroscopic flow reactor has been fabricated for studying hetereogeneous catalytic reactions at elevated temperatures. Adsorption of CO2 on alumina and modified alumina catalysts shows the formation of several different surface carbonates. The hydrogen carbonate on alumina has a fast equilibrium with the gas phase. During the reduction of benzoic acid esters in this reactor, the formation of surface benzoate and carbonate has been observed. The desorption rate of the surface benzoate depends on the composition of the catalyst.