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A lithium���tellurium rechargeable battery with exceptional cycling stability

Journal Article


Abstract


  • Abstract: A Li���Te rechargeable cell with exceptionally high specific capacity and cycling stability at high charge/discharge rates is presented. The cell was composed of a Te/mesoporous carbon CMK-3 composite positive electrode and a Li metal negative electrode. The Te/CMK-3 electrode was prepared using a melt diffusion process and characterized using scanning electron microscope, X-ray diffraction, and Brunauer���Emmett���Teller surface area analysis. Cyclic voltammograms of the Te/CMK-3 electrode suggested reversible (de)lithiation of Te at 1.63/1.88 VLi+/Li combined with irreversible formation processes. Initial cell cycling for formation process revealed voltage plateaus consistent with the cyclic voltammograms until a stationary capacity of about 400��mA��h g���1 at 1C with 100��% coulombic efficiency was reached. Discharge capacities retained 96��% (0.5C), 86��% (1C), 78��% (2C), and 69��% (5C) of the theoretical specific capacity. Long-term cyclability tests involving 1000 charge/discharge cycles at 10C rate delivered an unprecedented specific capacity of 286��mA��h g���1 at essentially 100��% coulombic efficiency (85��% capacity retention). The study bears testimony to the favorable high-rate stability of the Li���Te/CMK-3 cell design outperforming previously reported chalcogen-based electrode systems. Graphical Abstract: [Figure not available: see fulltext.]

Publication Date


  • 2016

Citation


  • Koketsu, T., Paul, B., Wu, C., Kraehnert, R., Huang, Y., & Strasser, P. (2016). A lithium���tellurium rechargeable battery with exceptional cycling stability. Journal of Applied Electrochemistry, 46(6), 627-633. doi:10.1007/s10800-016-0959-8

Scopus Eid


  • 2-s2.0-84964089825

Web Of Science Accession Number


Start Page


  • 627

End Page


  • 633

Volume


  • 46

Issue


  • 6

Place Of Publication


Abstract


  • Abstract: A Li���Te rechargeable cell with exceptionally high specific capacity and cycling stability at high charge/discharge rates is presented. The cell was composed of a Te/mesoporous carbon CMK-3 composite positive electrode and a Li metal negative electrode. The Te/CMK-3 electrode was prepared using a melt diffusion process and characterized using scanning electron microscope, X-ray diffraction, and Brunauer���Emmett���Teller surface area analysis. Cyclic voltammograms of the Te/CMK-3 electrode suggested reversible (de)lithiation of Te at 1.63/1.88 VLi+/Li combined with irreversible formation processes. Initial cell cycling for formation process revealed voltage plateaus consistent with the cyclic voltammograms until a stationary capacity of about 400��mA��h g���1 at 1C with 100��% coulombic efficiency was reached. Discharge capacities retained 96��% (0.5C), 86��% (1C), 78��% (2C), and 69��% (5C) of the theoretical specific capacity. Long-term cyclability tests involving 1000 charge/discharge cycles at 10C rate delivered an unprecedented specific capacity of 286��mA��h g���1 at essentially 100��% coulombic efficiency (85��% capacity retention). The study bears testimony to the favorable high-rate stability of the Li���Te/CMK-3 cell design outperforming previously reported chalcogen-based electrode systems. Graphical Abstract: [Figure not available: see fulltext.]

Publication Date


  • 2016

Citation


  • Koketsu, T., Paul, B., Wu, C., Kraehnert, R., Huang, Y., & Strasser, P. (2016). A lithium���tellurium rechargeable battery with exceptional cycling stability. Journal of Applied Electrochemistry, 46(6), 627-633. doi:10.1007/s10800-016-0959-8

Scopus Eid


  • 2-s2.0-84964089825

Web Of Science Accession Number


Start Page


  • 627

End Page


  • 633

Volume


  • 46

Issue


  • 6

Place Of Publication