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나노입자 연구단
나노입자 연구단
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3D macroporous electrode and high-performance in lithium-ion batteries using SnO 2 coated on Cu foam

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Title
3D macroporous electrode and high-performance in lithium-ion batteries using SnO 2 coated on Cu foam
Author(s)
Ji Hyun Um; Choi M.; Park H.; Cho Y.-H.; Dunand D.C.; Choe H.; Yung-Eun Sung
Publication Date
2016-01
Journal
SCIENTIFIC REPORTS, v.6, no., pp.18626 -
Publisher
NATURE PUBLISHING GROUP
Abstract
A three-dimensional porous architecture makes an attractive electrode structure, as it has an intrinsic structural integrity and an ability to buffer stress in lithium-ion batteries caused by the large volume changes in high-capacity anode materials during cycling. Here we report the first demonstration of a SnO 2-coated macroporous Cu foam anode by employing a facile and scalable combination of directional freeze-casting and sol-gel coating processes. The three-dimensional interconnected anode is composed of aligned microscale channels separated by SnO 2-coated Cu walls and much finer micrometer pores, adding to surface area and providing space for volume expansion of SnO 2 coating layer. With this anode, we achieve a high reversible capacity of 750 mAh g'1 at current rate of 0.5 C after 50 cycles and an excellent rate capability of 590 mAh g'1 at 2 C, which is close to the best performance of Sn-based nanoscale material so far. Copyright © 2016, Macmillan Publishers Limited This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI
http://pr.ibs.re.kr/handle/8788114/2628
DOI
10.1038/srep18626
ISSN
2045-2322
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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