Title

Si/SiOx-conductive polymer core-shell nanospheres with an improved conducting path preservation for lithium-ion battery

RIS ID

109444

Publication Details

Park, E., Kim, J., Chung, D., Park, M., Kim, H. & Kim, J. (2016). Si/SiOx-conductive polymer core-shell nanospheres with an improved conducting path preservation for lithium-ion battery. ChemSusChem: chemistry and sustainability, energy and materials, 9 (19), 2754-2758.

Abstract

Non-stoichiometric SiOx based materials have gained much attention as high capacity lithium storage materials. However, their anode performance of these materials should be further improved for their commercial success. A conductive polymer, poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS), is employed as a flexible electrical interconnector to improve the electrochemical performance of Si/SiOx nanosphere anode materials for lithium ion batteries (LIBs). The resulting Si/SiOx-PEDOT:PSS core-shell structured material with the small amount (1 wt %) of PEDOT:PSS shows the improved initial reversible capacity of 968.2 mA h g−1 with excellent long-term cycle performance over 200 cycles. These promising properties can be attributed to the use of the electroconductive and flexible PEDOT:PSS shell layer, which protects the electrical conduction pathways in the electrode from the large volume changes of silicon during cycling.

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Link to publisher version (DOI)

http://dx.doi.org/10.1002/cssc.201600798