title: The application of catalyst-recovered SnO2 as an anode material for lithium secondary batteries.
abstract: We studied the electrochemical characteristics of tin dioxide (SnO2) recovered from waste catalyst material which had been previously used in a polymer synthesis reaction. In order to improve the electrochemical performance of the SnO2 anode electrode, we synthesized a nanocomposite of recovered SnO2 and commercial iron oxide (Fe2O3) (weight ratio 95:5) using a solid state method. X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) analyses revealed an additional iron oxide phase within a porous nanocomposite architecture. The electrochemical characterizations were based on galvanostatic charge-discharge (CD) curves, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). In the first discharge, the capacity of the SnO2-Fe2O3 nanocomposite was 1700 mAh g(-1), but was reduced to about 1200 mAh g(-1) in the second discharge. Thereafter, a discharge capacity of about 1000 mAh g(-1)was maintained up to the 20th cycle. The SnO2-Fe2O3 nanocomposite showed better reversible capacities and rate capabilities than either the recovered SnO2 or commercial Fe2O3 nanoparticle samples.
authors.affiliation: Department of Chemistry, University of Ulsan, Ulsan, 680-749, Korea.
authors.forename: Da-Jeong
authors.initials: DJ
authors.lastname: Ryu
authors.affiliation: Department of Chemistry, University of Ulsan, Ulsan, 680-749, Korea.
authors.forename: Hee-Won
authors.initials: HW
authors.lastname: Jung
authors.affiliation: Department of Chemistry, University of Ulsan, Ulsan, 680-749, Korea.
authors.forename: Sung-Hun
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Department of Chemistry, University of Ulsan, Ulsan, 680-749, Korea.
authors.forename: Da-Jeong
authors.initials: DJ
authors.lastname: Park
authors.affiliation: Department of Chemistry, University of Ulsan, Ulsan, 680-749, Korea. ryuks@ulsan.ac.kr.
authors.forename: Kwang-Sun
authors.initials: KS
authors.lastname: Ryu
mesh_terms: D002384:Catalysis; D011211:Electric Power Supplies; D004566:Electrodes; D005290:Ferric Compounds / Q000737:chemistry; D008094:Lithium / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry; D016062:Porosity; D017971:Tin Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D005290:Ferric Compounds; D017971:Tin Compounds; C000499:ferric oxide; D008094:Lithium; C045358:stannic oxide
keywords: Anode; Fe2O3; Lithium secondary battery; Nanocomposite; Recovery; SnO2