Si/SiO_x-Conductive Polymer Core-Shell Nanospheres with an Improved Conducting Path Preservation for Lithium-Ion Battery

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• 作者：Eunjun Park ; Dr. Jeonghun Kim ; Dong Jae Chung ; Prof. Min-Sik Park ; Prof. Hansu Kim and Prof. Jung Ho Kim
• 刊名：ChemSusChem
• 出版年：2016
• 出版时间：October 6, 2016
• 年：2016
• 卷：9
• 期：19
• 页码：2754-2758
• 全文大小：1732K
• ISSN：1864-564X

文摘

Non-stoichiometric SiO_x 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/SiO_x nanosphere anode materials for lithium ion batteries (LIBs). The resulting Si/SiO_x-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.