Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 19, Issue 2, Pages 1001-1005Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2019.15956
Keywords
Galvanic Replacement; Anodes; Alloy Composites; Lithium-Ion Batteries
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Funding
- Korea Institute of Energy Technology valuation and Planning (KETEP)
- Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea [20162010104190, 20174030201470]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
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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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