Gurunathan, P. and Pedda Masthanaiah, E. and Ramesha, K. (2014) Synthesis of Hierarchically Porous SnO2 Microspheres and Performance Evaluation as Li-Ion Battery Anode by Using Different Binders. Applied Materials and Interfaces, 6. pp. 16556-64.

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We have prepared nanoporous SnO2 hollow microspheres (HMS) by employing the resorcinol-formaldehyde (RF) gel method. Further, we have investigated the electrochemical property of SnO2−HMS as negative electrode material in rechargeable Li-ion batteries by employing three different binderspolyvinylidene difluoride (PVDF), Na salt of carboxy methyl cellulose (Na-CMC), and Na-alginate. At 1C rate, SnO2 electrode with Na-alginate binder exhibits discharge capacity of 800 mA h g−1, higher than when Na- CMC (605 mA h g−1) and PVDF (571 mA h g−1) are used as binders. After 50 cycles, observed discharge capacities were 725 mA h g−1, 495 mA h g−1, and 47 mA h g−1, respectively, for electrodes with Na-alginate, Na-CMC, and PVDF binders that amounts to a capacity retention of 92%, 82%, and 8% . Electrochemical impedance spectroscopy (EIS) results confirm that the SnO2 electrode with Na-alginate as binder had much lower charge transfer resistance than the electrode with Na-CMC and PVDF binders. The superior electrochemical property of the SnO2 electrode containing Na-alginate can be attributed to the cumulative effects arising from integration of nanoarchitecture with a suitable binder; the hierarchical porous structure would accommodate large volume changes during the Li interaclation− deintercalation process, and the Na-alginate binder provides a stronger adhesion betweeen electrode film and current collector

Item Type: Article
Uncontrolled Keywords: Lithium Ion Battery; Microspheres
Subjects: Lithium batteries
Electrochemical Power Sources
Depositing User: Dr. N Meyyappan
Date Deposited: 26 Dec 2014 08:12
Last Modified: 26 Dec 2014 08:12

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