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论文类型：期刊论文
发表时间：2015-02-04
发表刊物：ACS APPLIED MATERIALS & INTERFACES
收录刊物：SCIE、EI、PubMed、Scopus、ESI高被引论文
卷号：7
期号：4
页面范围：2444-2451
ISSN号：1944-8244
关键字：tin dioxide; graphene; polyaniline; phytic acid; Li-ion batteries
摘要：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 Sn2+ 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).