Performance improvement of Li-rich layer-structured Li1.2Mn0.54Ni0.13Co0.13O2 by integration with spinel LiNi0.5Mn1.5O4

• DOI: 10.1039/c4cp04087b
• Publication Date: 2014-11-05T13:04:13Z
• Authors: Xin Feng; Zhenzhong Yang; Daichun Tang; Qingyu Kong; Lin Gu; Zhaoxiang Wang; Liquan Chen
• Keywords: Degradation

Li-rich layered Li1+xMnyM1-x-yO2 (or denoted xLi2MnO3·(1 -x)LiMO2, M = Ni, Co, Mn, etc.) are promising cathode materials for high energy-density Li-ion batteries. However, their commercial applications suffer from problems such as a drop in the capacity and discharge voltage during cycling. In this work, cycling performance of oxide Li1.2Ni0.13Co0.13Mn0.54O2 is improved by integration with spinel LiNi0.5Mn1.5O4 to obtain layered-spinel composite. Characterization powder X-ray diffraction (XRD), resolution transmission electron microscopy (HRTEM) well cyclic voltammetry (CV) indicates that delayed degradation Li2MnO3 suppressed growth LiMn2O4-like responsible improvement.