A high-performance Li-ion anode from direct deposition of Si nanoparticles

Journal article (2017)

Authors

Y. Xu ChemE/Materials for Energy Conversion and Storage - AS
Ellie Swaans Meyer Burger (Netherlands)
S. Basak QN/Zandbergen Lab , Kavli institute of nanoscience Delft
P.P.R.M.L. Harks ChemE/Materials for Energy Conversion and Storage - AS
B. Peng ChemE/Materials for Energy Conversion and Storage - AS
H.W. Zandbergen QN/Zandbergen Lab , Kavli institute of nanoscience Delft
Dana M. Borsa Meyer Burger (Netherlands)
F.M. Mulder ChemE/Materials for Energy Conversion and Storage - AS
Research Group
ChemE/Materials for Energy Conversion and Storage (AS) (TU Delft)
Si nanoparticles Li ion battery Direct deposition One-off SEI formation
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Published Date

01-08-2017

Language

English

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Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Research Group

ChemE/Materials for Energy Conversion and Storage

Abstract

Nanostructured silicon has been intensively investigated as a high capacity Li-ion battery anode. However, the commercial introduction still requires advances in the scalable synthesis of sophisticated Si nanomaterials and electrodes. Moreover, the electrode degradation due to volume changes upon de-/lithiation, low areal electrode capacity, and application of large amounts of advanced conductive additives are some of the challenging aspects. Here we report a Si electrode, prepared from direct deposition of Si nanoparticles on a current collector without any binder or conducting additives, that addresses all of the above issues. It exhibits an excellent cycling stability and a high capacity retention taking advantages of what appears to be a locally protective, yolk-shell reminiscent, solid electrolyte interphase (SEI) formation. Cycling an electrode with a Si nanoparticle loading of 2.2 mg cm−2 achieved an unrivalled areal capacity retention, specifically, up to 4.2 mAh cm−2 and ~ 1.5 mAh cm−2 at 0.8 mA cm−2 and 1.6 mA cm−2, respectively.