Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 4, Issue 7, Pages 3459-3464Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am3005237
Keywords
Kirkendall effect; hollow core; volume expansion; SnO2; anode; lithium rechargeable battery
Funding
- National Research Foundation of Korea
- Ministry of Education, Science, and Technology [NRF-2010-C1AAA001-0029018]
- Fundamental R&D Program for Technology of World Premier Materials
- Ministry of Knowledge Economy [10037918]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10037918] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Hollow spheres have been constructed by applying the Kirkendall effect to Sn nanocrystals. This not only accommodates the detrimental volume expansion but also reduces the Li+ transport distance enabling homogeneous Li-Sn alloying. Hollow Sn-SnO2 nanocrystals show a significantly enhanced cyclic performance compared to Sn nanocrystal alone due to its typical structure with hollow core. Sn-SnO2/graphite nanocomposites obtained by the chemical reduction and oxidation of Sn nano crystals onto graphite displayed very stable cyclic performance thanks to the role of graphite as an aggregation preventer as well as an electronic conductor.
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