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Expanding pore sizes of ZIF-8-derived nitrogen-doped microporous carbon via C60 embedding: toward improved anode performance for lithium-ion battery

Abstract

Porous carbon and nanocarbons have been extensively applied as anode materials for high-energy density lithium-ion batteries (LIBs). However, as another representative nanocarbon, fullerenes such as C60 have been scarcely utilized in LIBs because of its poor electrochemical reversibility. Herein, we designed a novel C60-embedded nitrogen-doped microporous carbon material (denoted as C60@N-MPC), which was derived from a zeolitic imidazolate framework-8 (ZIF-8) precursor, demonstrating its promising application as a superior anode material for LIB. We first embedded C60 in-situ into a ZIF-8 matrix via a facile solid-state mechanochemical route, which acted as a precursor and was transformed to C60@N-MPC after carbonization. The C60@N-MPC was applied as a novel anode for LIBs, showing an improved reversible specific capacity of ≈1351 mAh g-1 at 0.1 A g-1 and rate capacity (≈1077 mAh g-1 at 1 A g-1 after 400 cycles) relative to those based on the unmodified N-MPC anode. The role of C60 on the superior lithium storage performance of C60@N-MPC was elucidated, revealing that C60 functioned as a pore expander for N-MPC with 3-20 nm mesopores (versus sub-1 nm micropores for the unmodified N-MPC), which facilitated the rapid diffusion of organic electrolyte.

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Publication details

The article was received on 20 Oct 2017, accepted on 26 Dec 2017 and first published on 27 Dec 2017


Article type: Paper
DOI: 10.1039/C7NR07829C
Citation: Nanoscale, 2017, Accepted Manuscript
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    Expanding pore sizes of ZIF-8-derived nitrogen-doped microporous carbon via C60 embedding: toward improved anode performance for lithium-ion battery

    S. Yang, J. Guan, X. Zhong, X. Chen, X. Zhu, P. Li, J. Wu, Y. lu and Y. Yu, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR07829C

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