Facile synthesis of a hierarchical manganese oxide hydrate for superior lithium-ion battery anode

Manganese oxides have always been considered as promising high-performance electrodes due to the high specific capacity, low cost, and environmental benignity. Here, we have synthesized a hierarchical manganese oxide hydrate for superior lithium-ion battery anode via a facile liquid precipitation reaction and low-temperature heat treatment. The 2D layered structure with hydration water provides a smooth ion transfer path, while the porous hierarchical architecture constructed of nanosheets with high surface area increases active contact areas, Li+ transportation channels, and structural stability. Upon cycling, the oxidation of manganese and enhanced reaction kinetics can further contribute to the obvious rising capacity, cycling stability, and high-rate capability. Therefore, the manganese oxide hydrate can directly be the desirable products as superior electrodes without high-temperature heat treatment. The comprehensive utilization of structural hydration and hierarchical design offers more insights into the electrochemical reaction mechanisms and more possibilities to develop new materials for lithium-ion batteries.