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Fabrication and Characterization of SnO2/Graphene Composites as High Capacity Anodes for Li-Ion Batteries
Department of Mechanical and Materials Engineering, Florida International University, Miami 33174, FL, USA
* Author to whom correspondence should be addressed.
Received: 18 October 2013; in revised form: 8 November 2013 / Accepted: 12 November 2013 / Published: 15 November 2013
Abstract: Tin-oxide and graphene (TG) composites were fabricated using the Electrostatic Spray Deposition (ESD) technique, and tested as anode materials for Li-ion batteries. The electrochemical performance of the as-deposited TG composites were compared to heat-treated TG composites along with pure tin-oxide films. The heat-treated composites exhibited superior specific capacity and energy density than both the as-deposited TG composites and tin oxide samples. At the 70th cycle, the specific capacities of the as-deposited and post heat-treated samples were 534 and 737 mA·h/g, respectively, and the corresponding energy densities of the as-deposited and heat-treated composites were 1240 and 1760 W·h/kg, respectively. This improvement in the electrochemical performance of the TG composite anodes as compared to the pure tin oxide samples is attributed to the synergy between tin oxide and graphene, which increases the electrical conductivity of tin oxide and helps alleviate volumetric changes in tin-oxide during cycling.
Keywords: tin oxide; graphene; composites; lithium ion battery; anodes
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Dhanabalan, A.; Li, X.; Agrawal, R.; Chen, C.; Wang, C. Fabrication and Characterization of SnO2/Graphene Composites as High Capacity Anodes for Li-Ion Batteries. Nanomaterials 2013, 3, 606-614.
Dhanabalan A, Li X, Agrawal R, Chen C, Wang C. Fabrication and Characterization of SnO2/Graphene Composites as High Capacity Anodes for Li-Ion Batteries. Nanomaterials. 2013; 3(4):606-614.
Dhanabalan, Abirami; Li, Xifei; Agrawal, Richa; Chen, Chunhui; Wang, Chunlei. 2013. "Fabrication and Characterization of SnO2/Graphene Composites as High Capacity Anodes for Li-Ion Batteries." Nanomaterials 3, no. 4: 606-614.