Tin nanoparticles embedded in an N-doped microporous carbon matrix derived from ZIF-8 as an anode for ultralong-life and ultrahigh-rate lithium-ion batteries
| Autor: | Yuchang Si, Haixia Li, Qingqing Han, Lifang Jiao, Ting Jin, Yang Li, Yijing Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Doping chemistry.chemical_element Nanoparticle 02 engineering and technology Microporous material 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Anode Inorganic Chemistry chemistry Chemical engineering Electrode Lithium 0210 nano-technology Tin |
| Zdroj: | Inorganic Chemistry Frontiers. 6:1238-1244 |
| ISSN: | 2052-1553 |
| Popis: | Sn is a promising anode material for lithium-ion batteries (LIBs). However, the huge volume changes during lithiation/delithiation processes lead to the pulverization of electrodes, thus resulting in poor cycling stability and rate performance. An N-doped microporous carbon matrix (N-MCM) derived from ZIF-8 with highly porous structures and open frameworks can effectively buffer volume expansion, restrain the aggregation of Sn nanoparticles and accelerate the diffusion of electrons/Li ions, contributing to the improvement of the electrochemical performance. Herein, we firstly used a facile chemical vapor transformation (CVT) method to confine Sn (∼0.8 nm) in an N-doped microporous carbon matrix (Sn@N-MCM). The as-prepared Sn@N-MCM as an anode for LIBs displays a high specific capacity (814.3 mA h g−1 at 0.1 A g−1), an excellent rate capability (225.5 mA h g−1 even at 20 A g−1), and an outstanding cycling stability (470 mA h g−1 after 2500 cycles at 4 A g−1). This work may open up a new avenue to design energy storage materials by utilizing the facile CVT method. |
| Databáze: | OpenAIRE |
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