Mechanism of Contrasting Ionic Conductivities in LiZrCl via I and Br Substitution.

Understanding the complex structural and chemical factors that influence ionic conduction mechanisms is paramount for developing advanced inorganic superionic conductors in all-solid-state batteries, particularly halide solid electrolytes with excellent electrochemical oxidative stability and mechanical sinterability. Herein, contrasting ionic conduction behaviors in I and Br substituted LiZrCl are revealed by combining experimental structural analyses and theoretical calculations. The inter-slab distance along the c-axis, which varies with the anion substitution and M2-M3 site disorder, is a key factor for opening the ab-plane conduction and facilitating the overall Li conduction.

Structural Disorder of a Layered Lithium Manganese Oxide Cathode Paving a Reversible Phase Transition Route toward Its Theoretical Capacity.

Layered lithium manganese oxides suffer from irreversible phase transitions induced by Mn migration and/or dissolution associated with the Jahn-Teller effect (JTE) of Mn, leading to inevitable capacity fading during cycling. The popular doping strategy of oxidizing Mn to Mn to relieve the JTE cannot completely eliminate the detrimental structural collapse from the cooperative JTE. Therefore, they are considered to be impractical for commercial use as cathode materials.

Tuning the Properties of Halide Nanocomposite Solid Electrolytes with Diverse Oxides for All-Solid-State Batteries.

Herein, we report halide nanocomposite solid electrolytes (HNSEs) that integrate diverse oxides with alterations that allow tuning of their ionic conductivity, (electro)chemical stability, and specific density. A two-step mechanochemical process enabled the synthesis of multimetal (or nonmetal) HNSEs, MO-2LiZrCl, as verified by pair distribution function and X-ray diffraction analyses. The multimetal (or nonmetal) HNSE strategy increases the ionic conductivity of LiZrCl from 0.

Electrochemical Storage Behavior of a High-Capacity Mg-Doped P2-Type NaFeMnO Cathode Material Synthesized by a Sol-Gel Method.

Grid-scale energy storage applications can benefit from rechargeable sodium-ion batteries. As a potential material for making non-cobalt, nickel-free, cost-effective cathodes, earth-abundant NaFeMnO is of particular interest. However, Mn ions are particularly susceptible to the Jahn-Teller effect, which can lead to an unstable structure and continuous capacity degradation.

Scalable Precursor-Assisted Synthesis of a High Voltage LiNiCoPO Cathode for Li-Ion Batteries.

A solid-solution cathode of LiCoPO-LiNiPO was investigated as a potential candidate for use with the LiTiO (LTO) anode in Li-ion batteries. A pre-synthesized nickel-cobalt hydroxide precursor is mixed with lithium and phosphate sources by wet ball milling, which results in the final product, LiNiCoPO (LNCP) by subsequent heat treatment. Crystal structure and morphology of the product were analyzed by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM).

Boosting the interfacial superionic conduction of halide solid electrolytes for all-solid-state batteries.

Designing highly conductive and (electro)chemical stable inorganic solid electrolytes using cost-effective materials is crucial for developing all-solid-state batteries. Here, we report halide nanocomposite solid electrolytes (HNSEs) ZrO(-ACl)-AZrCl (A = Li or Na) that demonstrate improved ionic conductivities at 30 °C, from 0.40 to 1.

MoO@MoS Core-Shell Structured Hybrid Anode Materials for Lithium-Ion Batteries.

We explore a phase engineering strategy to improve the electrochemical performance of transition metal sulfides (TMSs) in anode materials for lithium-ion batteries (LIBs). A one-pot hydrothermal approach has been employed to synthesize MoS nanostructures. MoS and MoO phases can be readily controlled by straightforward calcination in the (200-300) °C temperature range.

Hysteresis Induced by Incomplete Cationic Redox in Li-Rich 3d-Transition-Metal Layered Oxides Cathodes.

Activation of oxygen redox during the first cycle has been reported as the main trigger of voltage hysteresis during further cycles in high-energy-density Li-rich 3d-transition-metal layered oxides. However, it remains unclear whether hysteresis only occurs due to oxygen redox. Here, it is identified that the voltage hysteresis can highly correlate to cationic reduction during discharge in the Li-rich layered oxide, Li Ni Mn O .

Tailoring Solution-Processable Li Argyrodites LiPMSI (M = Ge, Sn) and Their Microstructural Evolution Revealed by Cryo-TEM for All-Solid-State Batteries.

Owing to their high Li conductivities, mechanical sinterability, and solution processability, sulfide Li argyrodites have attracted much attention as enablers in the development of high-performance all-solid-state batteries with practicability. However, solution-processable Li argyrodites have been developed only for a composition of LiPSX (X = Cl, Br, I) with insufficiently high Li conductivities (∼10 S cm). Herein, we report the highest Li conductivity of 0.