Fabrication and characterization of boron-doped silicon microchannel plates as lithium-ion microbatteries anodes

A three-dimensional (3D) anode using boron-doped Si microchannel plate (Si-MCP) as matrix and active material was proposed. Using lithium foils as the counter electrodes, typical half-cells were fabricated and tested. Galvanostatic charge-discharge (C-D) measurements were conducted between 0.05 and 1.5 V, boron-doped Si-MCP anode exhibited a charge capacity of 3250 mAh g^-1 with a coulombic efficiency close to 46% in the initial cycle, but above 79.6% in the second cycle. Moreover, it could keep reversible discharge capacities above 500 mAh g^-1 after the 10th cycle. Based on cyclic voltammetry (CV) data, the mechanism about the lithiation of boron-doped Si-MCP was also proposed.