Heterogeneous structured Mn2O3/Fe2O3 composite as anode material for high performance lithium ion batteries

Abstract

As the anode materials for lithium ion batteries, manganese-based oxides draw great attention due to the abundant mineral reserves and high specific capacity. Nonetheless, severe volume expansion and structural collapse during the charging/discharging process hindered their commercial application. To solve these problems, the heterogeneous Mn2O3/Fe2O3 composite are designed in this study and structure influence on the lithium ion storage performance is studied. As anode material for lithium ion batteries, heterogeneous structured Mn2O3/Fe2O3 composites have a superior specific capacity (750 mAh·g−1 at 1 A g−1), excellent cycling stability (85.2% after 500 cycles), and outstanding rate capability (435 mAh g−1 at 2.0 A g−1). Additionally, this article also verified the feasibility of full lithium ion battery with heterostructure Mn2O3/Fe2O3 as anode and LiFePO4 as cathode, and the full battery display great performance. The results show that the heterogeneous structured Mn2O3/Fe2O3 plays a vital role in improving the electrochemical properties.