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Germanium Nanotubes Prepared by Using the Kirkendall Effect as Anodes for High‐Rate Lithium Batteries
Author(s) -
Park MiHee,
Cho YongHyun,
Kim Kitae,
Kim Jeyoung,
Liu Meilin,
Cho Jaephil
Publication year - 2011
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201103062
Subject(s) - kirkendall effect , germanium , materials science , anode , lithium (medication) , cathode , nanowire , nanotechnology , chemical engineering , yield (engineering) , optoelectronics , composite material , metallurgy , silicon , chemistry , electrode , medicine , engineering , endocrinology
Ultralong germanium nanotubes (Ge NTs; see picture) are synthesized in high yield from core–shell Ge–Sb nanowires by utilizing the Kirkendall effect at 700 °C. The Ge NTs have an exceptionally high rate capability (40 Ag −1 ) while maintaining a reversible capacity of more than 1000 mAhg −1 over 400 cycles, with minimal capacity fading when paired with a LiCoO 2 cathode in a lithium‐ion cell.