All-manganese-based Li-ion batteries with high rate capability and ultralong cycle life

Highlights: • Core–shell [email protected] nanowires with internal void spaces are fabricated. • LiMn₂O₄∥[email protected] full cell deliver a high energy density of 397 Wh kg⁻¹. • The full cell retains 215 Wh kg⁻¹ even at a high power density of 6.2 kW kg⁻¹. • The full cell sustains a long lifetime with 13% capacity loss over 1000 cycles. High-rate and long-cycle life Li-ion batteries constructed with all-manganese-based electrode materials have been successfully realized. The key to the success is the facile green synthesis of the anode: [email protected] core–shell nanowires with internal void spaces and a uniform carbon coating shell. The unique one-dimensional nano-configuration provides reduced solid-state distance for Li-ion/electron transport, enhanced electrical conductivity for charge transfer, and effectively volumetric accommodation for Li-ion insertion/extraction, thus enabling the [email protected] nanostructures to exhibit high-rate Li-ion storage capacity and long cycling stability. When coupled with a nanostructured LiMn₂O₄ cathode, the all-manganese-based [email protected]∥LiMn₂O₄ full cell characterizes a high energy density of 397 Wh kg⁻¹, high rate capability (215 Wh kg⁻¹ at a power density of 6.2 kW kg⁻¹), and an extremely low decay rate of 0.087% per cycle over 1000 cycles. Combining with additional merits of low cost, eco-friendliness, and safe operation, our design will shed light on fabricating high-performance Li-ion batteries from all manganese-based electrode materials.