Author(s): Ren, YB (Ren, Yanbiao); Zhang, SC (Zhang, Shichao); Zhang, LC (Zhang, Lincai); He, XW (He, Xiaowu)
Source: JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T Volume: 9 Issue: 2 Pages: 1549-1558 DOI: 10.1016/j.jmrt.2019.11.081 Published: MAR-APR 2020
Abstract: In this work, Cu-Ni nano-pillars array (CNPs) with controlled morphology and compositions was synthesized via electro- deposition method as 3D current collector. Si@CNPs electrode was then prepared by magnetic sputtering with Si film thickness of 200 nm and used as the carbon/binder free anode for lithium ion battery. The coulumbic efficiency of Si@CNPs anode was 98 %-99 % after 2 cycles. The discharge capacity of Si@CNPs anode reached to 1766.5 mA h.g(-1) and the high capacity retention was 91.6 % after 60 cycles. Furthermore, the reversible capacity of Si@CNPs anode can still remain above 1090 mA h.g(-1) at 2 C due to the improved diffusion rate of charge at the solid-liquid two phase interface and the collection efficiency of electrons in current collector, which was higher than that of 2D copper foil supported Si anode (Si@CF). (C) 2019 The Authors. Published by Elsevier B.V.
Accession Number: WOS:000521952300040
ISSN: 2238-7854
eISSN: 2214-0697
Full Text: https://www.sciencedirect.com/science/article/pii/S2238785419308397?via%3Dihub