Comments on stabilizing layered manganese oxide electrodes for Li batteries

An electrochemical study of structurally-integrated xLi(2)MnO(3)center dot(1-x)LiMn0.5Ni0.5O2 'composite' materials has been undertaken to investigate the stability of electrochemically-activated electrodes at the Li2MnO3-rich end of the Li2MnO3-LiMn0.5Ni0.5O2 tie-line, i.e., for 0.7 <= x <= 0.95. Excellent performance was observed for x = 0.7 in lithium half-cells; comparable to activated electrodes that have significantly lower values of x and are traditionally the preferred materials of choice. Electrodes with higher manganese content (x >= 0.8) showed significantly reduced performance. Implications for stabilizing low-cost manganese-rich, layered lithium-metaloxide electrode materials are discussed. (C) 2013 Elsevier B.V. All rights reserved.