Issue 20, 2019

Modified SiO hierarchical structure materials with improved initial coulombic efficiency for advanced lithium-ion battery anodes

Abstract

Silicon-based anode materials are indispensable components in developing high energy density lithium-ion batteries, yet their practical application still faces great challenges, such as large volume change during the lithiation and delithiation process that causes the pulverization of silicon particles, and continuous formation and reformation of the solid electrolyte interfaces (SEI) which results in a low initial coulombic efficiency. As an endeavor to address these problems, in this study, Si/SiO/Li2SiO3@C structures were prepared via a facile method using SiO, pitch powder and Li2CO3/PVA solution followed by annealing treatment. The Si/SiO/Li2SiO3@C composite shows a great improvement in lithium storage where a high discharge capacity of 1645.47 mA h g−1 was delivered with the 1st C.E. of 69.05% at 100 mA g−1. These results indicate that the designed method of integrating prelithiation and carbon coating for SiO and the as-prepared macro scale Si/SiO/Li2SiO3@C structures are practical for implementation in lithium-ion battery technology.

Graphical abstract: Modified SiO hierarchical structure materials with improved initial coulombic efficiency for advanced lithium-ion battery anodes

Supplementary files

Article information

Article type
Paper
Submitted
29 Jan 2019
Accepted
01 Apr 2019
First published
12 Apr 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 11369-11376

Modified SiO hierarchical structure materials with improved initial coulombic efficiency for advanced lithium-ion battery anodes

L. Xie, H. Liu, S. Lin, X. Yang, M. Qi, L. Zhu, Y. Guo and G. Guo, RSC Adv., 2019, 9, 11369 DOI: 10.1039/C9RA00778D

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