A Convenient and Versatile Method To Control the Electrode Microstructure toward High-Energy Lithium-Ion Batteries

A Convenient and Versatile Method To Control the Electrode Microstructure toward High-Energy Lithium-Ion Batteries

TitleA Convenient and Versatile Method To Control the Electrode Microstructure toward High-Energy Lithium-Ion Batteries
Publication TypeJournal Article
Year of Publication2016
AuthorsHui Zhao, Qing Yang, Neslihan Yuca, Min Ling, Kenneth Higa, Vincent S Battaglia, Dilworth Y Parkinson, Venkat Srinivasan, Gao Liu
JournalNano Letters
Volume16
Issue7
Pagination4686 - 4690
Date Published01/2017
ISSN1530-6984
Abstract

Control over porous electrode microstructure is critical for the continued improvement of electrochemical performance of lithium ion batteries. This paper describes a convenient and economical method for controlling electrode porosity, thereby enhancing material loading and stabilizing the cycling performance. Sacrificial NaCl is added to a Si-based electrode, which demonstrates an areal capacity of ∼4 mAh/cm2 at a C/10 rate (0.51 mA/cm2) and an areal capacity of 3 mAh/cm2 at a C/3 rate (1.7 mA/cm2), one of the highest material loadings reported for a Si-based anode at such a high cycling rate. X-ray microtomography confirmed the improved porous architecture of the SiO electrode with NaCl. The method developed here is expected to be compatible with the state-of-the-art lithium ion battery industrial fabrication processes and therefore holds great promise as a practical technique for boosting the electrochemical performance of lithium ion batteries without changing material systems.

DOI10.1021/acs.nanolett.6b02156
Short TitleNano Lett.
Refereed DesignationRefereed