TY - JOUR
T1 - Synthesis of Uniquely Structured SnO2 Hollow Nanoplates and Their Electrochemical Properties for Li-Ion Storage
AU - Park, Gi Dae
AU - Lee, Jung Kul
AU - Kang, Yun Chan
N1 - Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (NRF-2015R1A2A1A15056049). This work was supported by the Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (20153030091450).
Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/1/26
Y1 - 2017/1/26
N2 - A new mechanism for the transformation of nanostructured metal selenides into uniquely structured metal oxides via the Kirkendall effect, which results from the different diffusion rates of metal and Se ions and O2 gas, is proposed. SnSe nanoplates are selected as the first target material and transformed into SnO2 hollow nanoplates by the Kirkendall effect. SnSe-C composite powder, in which SnSe nanoplates are attached or stuck to amorphous carbon microspheres, transforms into several tens of SnO2 hollow nanoplates by a thermal oxidation process under an air atmosphere. Core–shell-structured SnSe-SnSe2@SnO2, SnSe2@SnO2, Se-SnSe2@SnO2, and Se@SnO2 and yolk–shell-structured Se@void@SnO2 intermediates are formed step-by-step during the oxidation of the SnSe nanoplates. The uniquely structured SnO2 hollow nanoplates have superior cycling and rate performance for Li-ion storage. Additionally, their discharge capacities at the 2nd and 600th cycles are 598 and 500 mA h g-1, respectively, and the corresponding capacity retention measured from the 2nd cycle is as high as 84%.
AB - A new mechanism for the transformation of nanostructured metal selenides into uniquely structured metal oxides via the Kirkendall effect, which results from the different diffusion rates of metal and Se ions and O2 gas, is proposed. SnSe nanoplates are selected as the first target material and transformed into SnO2 hollow nanoplates by the Kirkendall effect. SnSe-C composite powder, in which SnSe nanoplates are attached or stuck to amorphous carbon microspheres, transforms into several tens of SnO2 hollow nanoplates by a thermal oxidation process under an air atmosphere. Core–shell-structured SnSe-SnSe2@SnO2, SnSe2@SnO2, Se-SnSe2@SnO2, and Se@SnO2 and yolk–shell-structured Se@void@SnO2 intermediates are formed step-by-step during the oxidation of the SnSe nanoplates. The uniquely structured SnO2 hollow nanoplates have superior cycling and rate performance for Li-ion storage. Additionally, their discharge capacities at the 2nd and 600th cycles are 598 and 500 mA h g-1, respectively, and the corresponding capacity retention measured from the 2nd cycle is as high as 84%.
KW - Kirkendall diffusion
KW - hollow nanoplates
KW - lithium ion batteries
KW - spray pyrolysis
KW - tin oxide
UR - http://www.scopus.com/inward/record.url?scp=84997206776&partnerID=8YFLogxK
U2 - 10.1002/adfm.201603399
DO - 10.1002/adfm.201603399
M3 - Article
AN - SCOPUS:84997206776
SN - 1616-301X
VL - 27
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 4
M1 - 1603399
ER -
