Toward Positive Electrode Materials with High-Energy Density: Electrochemical and Structural Studies on LiCo _x Mn_2-x O₄ with 0 ≤ x ≤ 1.

ABSTRACT: To obtain positive electrode materials with higher energy densities (Ws), we performed systematic structural and electrochemical analyses for LiCo _x Mn_2-x O₄ (LCMO) with 0 ≤ x ≤ 1. X-ray diffraction measurements and Raman spectroscopy clarified that the samples with x ≤ 0.5 are in the single-phase of a spinel structure with the Fd3̅m space group, whereas the samples with x ≥ 0.75 are in a mixture of the spinel-phase and Li₂MnO₃ phase with the C2/m space group. The x-dependence of the discharge capacity (Q _dis) indicated a broad maximum at x = 0.5, although the average operating voltage (E _ave) monotonically increased

SUBMITTER: Mukai K 

PROVIDER: S-EPMC6641974 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature