Electrical transport properties in LiMn2O4, Li0.95Mn2O4, and LiMn1.95B0.05O4 (B=Al or Ga) around room temperature
作者： E. Iguchi , Y. Tokuda , H. Nakatsugawa , F. Munakata
DOI: 10.1063/1.1432123
关键词: Conductivity 、 Ion 、 Relaxation (physics) 、 Condensed matter physics 、 Polaron 、 Ionic conductivity 、 Materials science 、 Electron 、 Dielectric 、 Thermal conduction
摘要: In order to identify the carrier responsible for electrical transport at room temperature in LiMn2O4 from viewpoint of practical applications as a cathode material, bulk conductivity measurements by complex-plane impedance analyses have been carried out on LiMn2O4, Li0.95Mn2O4, and LiMn1.95B0.05O4 (B=Al3+ or Ga3+) together with four-probe dc conductivities dielectric relaxation processes, because these are two candidates carrier, Li ion nonadiabatic small polaron an eg electron Mn3+. The comparison ionic estimated numerically parameters obtained experimentally Li-diffusion indicates that seems difficult play primary role conduction. Instead, hopping-process polarons electrons is likely dominate predominantly properties. process, activation energies pre-exponential factors Li0.95Mn2O4 explained self-consistently terms polaronic
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