Fe2O3@SnO2 nanoparticle decorated graphene flexible films as high-performance anode materials for lithium-ion batteries

Autor:	Lian Gao, Shuo Liu, Ronghua Wang, Miaomiao Liu, Jing Sun, Xihai Jin, Jianqiang Luo
Rok vydání:	2014
Předmět:	Materials science Renewable Energy Sustainability and the Environment Graphene chemistry.chemical_element Nanoparticle Nanotechnology General Chemistry Electrolyte Microstructure Electrochemistry Anode law.invention chemistry law Electrode General Materials Science Lithium
Zdroj:	J. Mater. Chem. A. 2:4598-4604
ISSN:	2050-7496 2050-7488
DOI:	10.1039/c3ta14897a
Popis:	A flexible graphene film decorated with spindle-like Fe2O3@SnO2 nanoparticles was fabricated through vacuum filtration of Fe2O3@SnO2 and GO mixing solution, followed by thermal reduction. The core–shell structured Fe2O3@SnO2 nanoparticles were synthesized through a facile hydrothermal route, which avoided agglomeration of Fe2O3 and SnO2 nanoparticles and was beneficial for electrolyte diffusion. Microstructure characterizations showed that the spindle-like Fe2O3@SnO2 nanoparticles were uniformly dispersed between layered graphene nanosheets, forming a sandwich-like structure. The unique interleaved structure was favorable for lithium ion diffusion and electron transfer. As binder-free electrodes for lithium-ion batteries, the flexible Fe2O3@SnO2/GS films exhibited discharge and charge capacities of 2063 and 1255 mA h g−1 respectively, with an excellent cycling performance of 1015 mA h g−1 even after 200 cycles. The specific capacity of the Fe2O3@SnO2/GS electrode is higher than that of both Fe2O3/GS and SnO2/GS electrodes, indicating a positive synergistic effect of Fe2O3 and SnO2 on the improvement of electrochemical performance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cdd47ffc8f911b398eb733cae36d8f44 https://doi.org/10.1039/c3ta14897a Zobrazit plný text záznamu