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Electrochemical Performance of Sn/SnO/Ni3Sn Composite Anodes for Lithium-Ion Batteries
Tuan Loi Nguyen1, Ji Hyeon Kim1, Il Tae Kim1
1Department of Chemical and Biological Engineering, Gachon University, Seongnam-si, Gyeonggi-do, 13120, Republic of Korea.
Abstract:
We have synthesized a novel composite material Sn/SnO/Ni₃Sn via galvanic replacement reaction between Sn and Ni2+ ions in triethylene glycol medium and at high temperature. The reaction time affected structure, particle size, and composition of Sn/SnO/Ni₃Sn composites, which were analyzed by high resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. The active component (Sn) reacts with Li+ ions while inactive component (Ni) acts as a metal framework to support the electrochemically active Sn, a buffer to reduce volume change during cycling, and the electron conductor. Among electrodes, the Sn/SnO/Ni₃Sn-6h electrode demonstrated stable cycling and reversible capacity of 246 mAh g-1 even after 300 cycles owing to the advantages from the unique hybrid structure.
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