Journal
JOURNAL OF POWER SOURCES
Volume 385, Issue -, Pages 114-121Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2018.03.031
Keywords
Reduced graphene oxide; Sb2O3; Nanocomposites; Anode; Li-ion battery; Na-ion battery
Funding
- National Key Basic Research Program of China [2014CB932400]
- Joint Fund of the National Natural Science Foundation of China [U1401243]
- National Nature Science Foundation of China [51232005]
- Shenzhen Technical Plan Project [JCYJ20150529164918735, KQJSCX20160226191136, JCYJ20170412170911187]
- Guangdong Technical Plan Project [2015TX01N011]
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The antimony oxide/reduced graphene oxide (Sb2O3/rGO) nanocomposites are used as anode of Li-ion and Na-ion batteries (LIBs and NIBs). However, it is unclear about Li-ion and Na-ion storage mechanism in Sb2O3/rGO nanocomposites. Herein, the conversion-alloying mechanisms of Sb2O3/rGO anodes for Na-ion and Li-ion storage are comparatively studied with a combined in-situ XRD and quasi in-situ XPS method. The distinct behaviours are monitored during (de)lithiation and (de)sodiation with respect to crystal structure and chemical composition evolution. It is evidenced that the Na-ion can be easily transported to the inner part of the Sb2O3, where the Li-ion almost cannot reach, leading to a fully transformation during sodiation. In addition, the conversion reaction product of amorphous Na2O display their better chemical stability than amorphous Li2O during electrochemical cycles, which contribute to a stable and long cycling life of NIBs. This work gain insight into the high-capacity anodes with conversation-alloying mechanism for NIBs.
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