Boron heteroatom-doped silicon–carbon peanut-like composites enables long life lithium-ion batteries

• DOI: 10.1007/s12598-021-01741-0
• Publication Date: 2021-05-17T12:03:15Z
• Authors: Fang-Zhou Zhang; Yuan-Yuan Ma; Miao-Miao Jiang; Wei Luo; Jian-Ping Yang
• Keywords: Heteroatom; Carbon fibers; Boric acid

Carbon coated Si core–shell structures have been proposed to solve the adverse effects of Si-based anode. However, designing ideal core–shell architecture with excellent surface and interface properties is still a significant challenge. Herein, a novel peanut-like structure of B-doped silicon/carbon nanoparticle (Si@B-C) synthesized by sol–gel process and subsequent thermal reduction is reported. The peanut-like Si@B-C electrode demonstrates a superior cyclability of 534 mAh·g−1 after 1000 cycles at high current density of 1000 mA·g−1. The exceptional electrochemical performance is attributed to the boric acid-induced highly interconnected peanut-like structure and boron heteroatom framework could provide a continuous electron pathway to reduce the irreversible lithium ion loss during rapid cycling. This work provides insight into the development of the heteroatom-doped Si-based anodes with stable cycling performance for LIBs.