A new form of LiMn2O4 is reported. The structure is the CaFe2O4-type and 6% denser than the spinel. The structure transformation was achieved by heating at 6 GPa. Analysis of the neutron diffraction pattern confirmed an average of the structure; the unit cell was orthorhombic at a = 8.8336(5) angstroms, b = 2.83387(18) angstroms, and c = 10.6535(7) angstroms (Pnma). Electron diffraction pattern...

Zinc (Zn) metal anodes have enticed substantial curiosity for large-scale energy storage owing to inherent safety, high specific and volumetric capacities of Zn anodes. However, the aqueous electrolyte traditionally employed in batteries suffers severe decomposition due narrow voltage stability window. Herein, we introduce N-methylformamide (NMF) as an organic solvent modulate solvation structu...

Water-in-salt (WIS) electrolytes using super-concentrated organic lithium (Li) salts are of interest for aqueous Li-ion batteries. However, the high salt cost, viscosity, poor wettability, and environmental hazards remain a great challenge. Herein, we present localized water-in-salt (LWIS) electrolyte based on low-cost nitrate (LiNO3) 1,5-pentanediol (PD) as inert diluent. The addition PD maint...

Ultrathin film coatings on battery materials via atomic layer deposition (ALD) have been demonstrated as an efficient technology for performance enhancement. However, the fundamental understanding lithium intercalation into active through interface between coating and is unclear, which makes it difficult to optimize ALD strategies. Further, like most materials, a can undergo volume change durin...

A mechanically coupled diffusion model combined with finite element formulation is developed to study the influence of dislocations on ion in lithium-ion batteries. The dislocation modeled by regularized eigenstrain based a non-singular continuum theory. validated analytical solution stress field edge and for stress-dependent equilibrium concentration around dislocation. Simulation results LiMn...