Sb-AlxCy-C Nanocomposite Alloy Anodes for Lithium-Ion Batteries
- Authors
- Hung, Nguyen Thanh; Park, Sung-Hoon; Bae, Joonwon; Yoon, Young Soo; Kim, Ji Hyeon; Son, Hyung Bin; Lee, Daeho; Kim, Il Tae; Hur, Jaehyun
- Issue Date
- Aug-2016
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Nanocomposite; Antimony; Aluminium; Hybrid matrix; Anode
- Citation
- ELECTROCHIMICA ACTA, v.210, pp 567 - 574
- Pages
- 8
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 210
- Start Page
- 567
- End Page
- 574
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/19026
- DOI
- 10.1016/j.electacta.2016.05.019
- ISSN
- 0013-4686
1873-3859
- Abstract
- We present a facile approach to making Al-Sb, carbon-modified (Al-Sb-C) nanocomposites for use as new anode materials in lithium-ion batteries (LIB). Alloying is achieved by one step synthesis using high energy mechanical milling (HEMM), producing nanometer-sized alloy particles of Sb-AlxCyC. Based on electrochemical analyses, we determined that Sb acts as an active material, and both Al and carbon create a hybrid buffering matrix that mitigates the volume expansion of the active material during lithiation/delithiation to a greater degree than that by a pure metallic matrix (AlSb). In addition, we optimized the stoichiometric ratio of Al and Sb with regard to specific capacity and cycling performance. Of the ratios tested, a 1:1 molar ratio of Al and Sb exhibited the best cycling performance (302.5 mAh g (1) after 200 charge/discharge cycles). Although our Al-Sb-C composite had low initial coulombic efficiency (similar to 59%), recovery to similar to 97% occurred within three cycles, indicating that initial side reactions are quickly reduced over the course of cycling. AlSb-C anodes also showed good rate capability and volumetric capacity. Overall, the new AlSb-C composite is a promising candidate for use as negative electrodes in lithium-ion batteries, providing an alternative to commercially available graphite electrodes.
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