Premium
Laser Porosificated Silicon Anodes for Lithium Ion Batteries
Author(s) -
Sämann Christian,
Kelesiadou Katerina,
Hosseinioun Seyedeh Sheida,
Wachtler Mario,
Köhler Jürgen R.,
Birke Kai Peter,
Schubert Markus B.,
Werner Jürgen H.
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201701705
Subject(s) - materials science , anode , lithium (medication) , silicon , scanning electron microscope , laser , ion , layer (electronics) , cycling , optoelectronics , chemical engineering , nanotechnology , composite material , electrode , optics , medicine , chemistry , physics , archaeology , quantum mechanics , history , endocrinology , engineering
Abstract This study presents the first laser porosificated silicon anode for lithium‐ion batteries. The pulsed laser induced pore creation improves the cycling stability of the d = 210 nm thick sputtered thin film anodes compared to plain Si. Galvanostatic cycling with a charge capacity limited to C = 932 mAh g −1 and a 2 C current rate shows a stable cycling for more than N = 600 cycles. After N = 3000 cycles the laser porosificated and crystallized Si has a remaining capacity of C 3000 > 120 mAh g −1 . Postmortem scanning electron microscopy images after N = 3000 cycles prove that the laser porosification reduces cracks in the active layer.