Improved Li storage performance in SnO2 nanocrystals by a synergetic doping

Ning Wan, Xia Lu, Yuesheng Wang, Weifeng Zhang, Ying Bai, Yong Sheng Hu, Sheng Dai

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83 Scopus citations

Abstract

Tin dioxide (SnO is a widely investigated lithium (Li) storage material because of its easy preparation, two-step storage mechanism and high specific capacity for lithium-ion batteries (LIBs). In this contribution, a phase-pure cobalt-doped SnO(Co/SnO and a cobalt and nitrogen co-doped SnO2(Co-N/SnO2 nanocrystals are prepared to explore their Li storage behaviors. It is found that the morphology, specific surface area, and electrochemical properties could be largely modulated in the doped and co-doped SnOnanocrystals. Gavalnostatic cycling results indicate that the Co-N/SnOelectrode delivers a specific capacity as high as 716 mAh g â'1 after 50 cycles, and the same outstanding rate performance can be observed in subsequent cycles due to the ionic/electronic conductivity enhancement by co-doping effect. Further, microstructure observation indicates the existence of intermediate phase of Li 3 N with high ionic conductivity upon cycling, which probably accounts for the improvements of Co-N/SnOelectrodes. The method of synergetic doping into SnOwith Co and N, with which the electrochemical performances is enhanced remarkably, undoubtedly, will have an important influence on the material itself and community of LIBs as well.

Original languageEnglish
Article number18978
JournalScientific Reports
Volume6
DOIs
StatePublished - Jan 6 2016

Funding

This work was supported by the National Natural Science Foundation of China (50902044), the 863 Program of China (2015AA034201), the Program for Innovative Research Team in Science and Technology in University of Henan Province (IRTSTHN) (2012IRTSTHN004), the Innovation Scientists and Technicians Troop Construction Projects of Henan Province (124200510004), the State Scholarship Fund from China Scholarship Council, and the U.S. Department of Energy’s Office of Basic Energy Science, Division of Materials Sciences and Engineering, under contract with UT-Battelle, LLC (SD).

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