@article{14afbe2f6d7e40de8d13cff59260a5a9,
title = "Cu3Si enhanced crystallinity and dopamine derived nitrogen doping into carbon coated micron-sized Si/Cu3Si as anode material in lithium-ion batteries",
abstract = "A chemical vapor decomposition (CVD) enhanced carbon coated Si/Cu3Si composite aggregate (C-Si/Cu3Si@C) is prepared as anode material to alleviate volume expansion and improve the electrochemical performance for lithium-ion batteries (LIBs). In this work, micron-sized C-Si/Cu3Si@C is fabricated through self-assembling of dopamine as first carbon precursor on irregularly shaped and sub-micron-sized Si/Cu3Si composite, followed by CVD with ethylene (C2H4) as second carbon precursor. Besides, dopamine not only self-assembles on the surface of Si/Cu3Si composite but also grows into sheet-like film that supports and connects Si/Cu3Si composite into micron-sized aggregate. In addition to CVD, Cu3Si induces catalytic chemical vapor deposition (CCVD), which enhances integrality of the carbon shell as well as reinforce nitrogen doping into carbon shell to enhance conductivity. Therefore, the C-Si/Cu3Si@C composite performs in optimum condition when the cycle is stable, attaining delithiation capacity of 2101 mAh g−1, coulombic efficiency of 84.7% for the 1st cycle and achieves capacity retention of 82.9% after 100 cycles.",
author = "Wu, {Yu Hsien} and Huang, {Jow Lay} and Hou, {Shang Chieh} and Tsai, {Mi Ching} and Chang, {Chia Chin}",
note = "Funding Information: This work was financially supported by the Ministry of Science and Technology (MOST), Taiwan (Grant No. MOST 109-2622-8-006-005, MOST 109-2923-E-007-005, MOST 109-2622-8-024-001-TE4, MOST 109-3116-F-006-018, and MOST 109-2622-E-024-003-CC2) and by the Hierarchical Green-Energy Materials (Hi-GEM) Research Center, from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE). The authors gratefully acknowledge the use of analytical field emission scanning electron microscope (Carl Zeiss AURIGA CrossBeam), ultrahigh resolution transmission electron microscope (JEOL JEM-2100F Cs STEM) and electron spectroscopy for chemical analysis (PHI-5000) belonging to the Instrument Center of National Cheng Kung University. Funding Information: This work was financially supported by the Ministry of Science and Technology (MOST) , Taiwan (Grant No. MOST 109-2622-8-006-005 , MOST 109-2923-E-007-005 , MOST 109-2622-8-024-001-TE4 , MOST 109-3116-F-006-018 , and MOST 109-2622-E-024-003-CC2 ) and by the Hierarchical Green-Energy Materials (Hi-GEM) Research Center , from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE). Publisher Copyright: {\textcopyright} 2021",
year = "2021",
month = aug,
day = "10",
doi = "10.1016/j.electacta.2021.138495",
language = "English",
volume = "387",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",
}