微型多孔材料
阳极
材料科学
碳化
电解质
电化学
碳纤维
介孔材料
化学工程
锂(药物)
沸石咪唑盐骨架
电极
金属有机骨架
纳米技术
复合材料
化学
复合数
吸附
扫描电子显微镜
有机化学
催化作用
物理化学
内分泌学
工程类
医学
作者
Jian Guan,Xiongwu Zhong,Xiang Chen,Xianjun Zhu,Panlong Li,Jianhua Wu,Yalin Lu,Yan Yu,Shangfeng Yang
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2017-12-27
卷期号:10 (5): 2473-2480
被引量:45
摘要
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 their 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 C60in 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 mA h g-1 at 0.1 A g-1 and a better rate capacity (≈1077 mA h g-1 at 1 A g-1 after 400 cycles) relative to those based on the unmodified N-MPC anode. The role of C60 in 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 the organic electrolyte.
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