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Carbon/binder free 3D Si@Cu2O anode for high performance lithium ion battery


Author(s): Ren, YB (Ren, Yanbiao); He, XW (He, Xiaowu); Sui, WB (Sui, Wubin); Zhang, LC (Zhang, Lincai); Zhang, H (Zhang, Han); Xia, YQ (Xia, Yanqing); Shi, TS (Shi, Tiesheng); Song, MY (Song, Mengyuan); Wang, KP (Wang, Kunpeng); Li, GC (Li, Guichen)

Source: JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T Volume: 9 Issue: 4 Pages: 8081-8091 DOI: 10.1016/j.mrt.2020.05.086 Published: JUL-AUG 2020

Abstract: A liquid-phase reduction method was applied to the synthesis of Cu2O microspheres as a 3D array current collector. An active silicon film with a tunable thickness was then deposited on the 3D Cu2O microspheres by magnetic sputtering as the carbon/binder free anode for lithium ion battery (LIB). As a comparison, Si-Cu2O composite electrode was also prepared via a solvothermal method. The specific capacity of Si@Cu2O-15 anode gradually decreased from 1596.8 mA h.g(-1) to 1526.9 mA h square g(-1) after 100 cycles with an average loss of specific capacity at 0.24% per cycle. Moreover, the coulomb efficiency of the electrode remained at about 98%. Furthermore, the reversible capacity of the Si@Cu2O-15 anode still maintained above 709.0 mA h.g(-1) after 60 cycles at a higher rate of 2 C, being ascribed to the improved diffusion rate of charge at the solid-liquid interface and to the collection efficiency of electrons in the 3D current collector, which was higher than that of Si-Cu2O composite anode(remained as 448 mA h.g(-1) after 60 cycles at 2 C). (C) 2020 The Author(s). Published by Elsevier B.V.

Accession Number: WOS:000560999400001

ISSN: 2238-7854

eISSN: 2214-0697

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