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

Zhao H., Yang Q., Yuca N., Ling M., Higa K., Battaglia V. S., ...More

NANO LETTERS, vol.16, no.7, pp.4686-4690, 2016 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 7
  • Publication Date: 2016
  • Doi Number: 10.1021/acs.nanolett.6b02156
  • Journal Name: NANO LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4686-4690
  • Keywords: Porosity, high-capacity anode, conductive polymer binder, X-ray tomography, high loading, lithium-ion battery, CONDUCTIVE POLYMER BINDER, PERFORMANCE SILICON ANODES, HIGH-CAPACITY, DESIGN
  • Istanbul Technical University Affiliated: Yes

Abstract

Control over porous electrode microstructure is critical for the continued improvement of electrochemical performance of lithium ion batteries. 6 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 similar to 4 mAh/cm(2) at a C/10 rate (0.51 mA/cm(2)) and an areal capacity of 3 mAh/cm(2) at a C/3 rate (1.7 mA/cm(2)), 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.