Journal Article Li‐rich layered cathodes Pyr13TFSI ionic liquid all‐solid‐state batteries dielectric materials fast charging high voltage lithium metal battery high‐entropy high‐entropy electrolyte high‐voltage polymer electrolytes ion transport ion‐dipole interaction lithium‐ion batteries localized high concentration electrolyte low‐temperature electrolyte size effect solvation structure space charge layer structural degradation transition metal migration voltage decay