https://scholars.lib.ntu.edu.tw/handle/123456789/409035
標題: | Micrometer-Sized Nanoporous Sb/C Anode with High Volumetric Capacity and Fast Charging Performance for Sodium-Ion Batteries | 作者: | Selvaraj B. Huang S.-S. Wu C.-E. Lin Y.-H. Wang C.-C. Song Y.-F. Lu M.-L. Sheu H.-S. Wu N.-L. |
關鍵字: | high-energy ball-milling;porous Sb anode;sodium-ion battery;tap density;volumetric capacity density | 公開日期: | 2018 | 卷: | 1 | 期: | 5 | 起(迄)頁: | 2317-2325 | 來源出版物: | ACS Applied Energy Materials | 摘要: | Designing metal/C nanocomposites has been a prevalent strategy to address the volume expansion issue of alloying metal Na-ion battery (NIB) anodes but typically suffers from poor volumetric capacity. Here, micrometer-sized nanoporous Sb/C anode with high volumetric capacity and outstanding electrochemical performance is successfully synthesized using facile synthesis of a new class of solid-state reduction chemistry. The resulting Sb/C composite, containing 10 wt % C, possesses the combination of unique structural characteristics, including (1) micrometer-sized secondary particle, enabling high particle density; (2) nanoscale Sb crystallites, permitting reversible phase transformation during cycling; and (3) uniformly distributed nanoporosity, providing accommodation for Sb expansion and facile Na-ion diffusion. The Sb/C composite anode, showing outstanding cycling stability, exhibits a gravimetric capacity of 436 mAh g -1 -(Sb+C), a volumetric capacity of 427 mAh cm -3 and over 80% capacity retention at nearly 5 C rate, all of which substantially excel those of the conventional C-based anodes. In situ transmission X-ray microscopy analysis reveals fracture-free reversible and considerably reduced deformation of the composite particles during the sodiation/desodiation cycle. The synthesis method demonstrates general applicability to developing other alloying metal anodes for NIBs, as well as Li-ion batteries. ? 2018 American Chemical Society. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/409035 | ISSN: | 25740962 | DOI: | 10.1021/acsaem.8b00416 | SDG/關鍵字: | Alloying; Anodes; Antimony; Ball milling; Charging (batteries); Crystallites; In situ processing; Lithium-ion batteries; Metal ions; Micrometers; Sodium alloys; Electrochemical performance; High-energy ball milling; In-situ transmission; Reversible phase transformations; Solid state reduction; Structural characteristics; Tap density; Volumetric capacity; Sodium-ion batteries |
顯示於: | 化學工程學系 |
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