Superior performance for lithium storage from an integrated composite anode consisting of SiO-based active material and current collector

• Published in: Frontiers of materials science 2020-09, Vol.14 (3), p.243-254
• Main Authors: HUA, Junqiang, CHU, Hailiang, ZHU, Ying, FANG, Tingting, QIU, Shujun, ZOU, Yongjin, XIANG, Cuili, ZHANG, Kexiang, LI, Bin, ZHANG, Huanzhi, XU, Fen, SUN, Lixian
• Format: Article
• Language: English
• Subjects: Anodes; Chemistry and Materials Science; Core-shell structure; Cycles; Electrochemical analysis; integrated composite anode; Lithium; Lithium-ion batteries; lithium-ion battery; Materials Science; rate performance; Rechargeable batteries; red phosphorus; Research Article; silicon monoxide
• ISSN: 2095-025X; 2095-0268
• DOI: 10.1007/s11706-020-0511-y

Silicon-based material is considered to be one of the most promising anodes for the next-generation lithium-ion batteries (LIBs) due to its rich sources, non-toxicity, low cost and high theoretical specific capacity. However, it cannot maintain a stable electrode structure during repeated charge/discharge cycles, and therefore long cycling life is difficult to be achieved. To address this problem, herein a simple and efficient method is developed for the fabrication of an integrated composite anode consisting of SiO-based active material and current collector, which exhibits a core-shell structure with nitrogen-doped carbon coating on SiO/P micro-particles. Without binder and conductive agent, the volume expansion of SiO active material in the integrated composite anode is suppressed to prevent its pulverization. At a current density of 500 mA·g −1, this integrated composite anode exhibits a reversible specific capacity of 458 mA·h·g −1 after 200 cycles. Furthermore, superior rate performance and cycling stability are also achieved. This work illustrates a potential method for the fabrication of integrated composite anodes with superior electrochemical properties for high-performance LIBs.