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

Autor: Wei Luo, Miao-Miao Jiang, Jianping Yang, Fangzhou Zhang, Yuanyuan Ma
Rok vydání: 2021
Předmět:
Zdroj: Rare Metals. 41:1276-1283
ISSN: 1867-7185
1001-0521
DOI: 10.1007/s12598-021-01741-0
Popis: 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.
Databáze: OpenAIRE
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