title: Dually fixed SnO2 nanoparticles on graphene nanosheets by polyaniline coating for superior lithium storage.
abstract: Dually fixed SnO2 nanoparticles (DF-SnO2 NPs) on graphene nanosheets by a polyaniline (Pani) coating was successfully fabricated via two facile wet chemistry processes, including anchoring SnO2 NPs onto graphene nanosheets via reducing graphene oxide by Sn(2+) ion, followed by in situ surface sealing with the Pani coating. Such a configuration is very appealing anode materials in LIBs due to several structural merits: (1) it prevents the aggregation of SnO2 NPs, (2) accommodates the structural expanding of SnO2 NPs during lithiation, (3) ensures the stable as-formed solid electrolyte interface films, and (4) effectively enhances the electronic conductivity of the overall electrode. Therefore, the final DF-SnO2 anode exhibits stable cycle performance, such as a high capacity retention of over 90% for 400 cycles at a current density of 200 mA g(-1) and a long cycle life up to 700 times at a higher current density of 1000 mA g(-1).
authors.affiliation: Carbon Research Laboratory, Liaoning Key Lab for Energy Materials and Chemical Engineering, State Key Lab of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology , Dalian 116023, China.
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Dong
authors.forename: Zongbin
authors.initials: Z
authors.lastname: Zhao
authors.forename: Zhiyu
authors.initials: Z
authors.lastname: Wang
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Xuzhen
authors.initials: X
authors.lastname: Wang
authors.forename: Jieshan
authors.initials: J
authors.lastname: Qiu
keywords: Li-ion batteries; graphene; phytic acid; polyaniline; tin dioxide