Novel Method Based on Spin-Coating for the Preparation of 2D and 3D Si-Based Anodes for Lithium Ion Batteries

Abstract

Abstract:The present study describes a novel strategy for preparing thin Silicon 2D and 3D electrodes for lithium ion batteries by a spin coating method. A homogeneous and stable suspension of Si nanoparticles (SiNPs) was prepared by dispersing the nanoparticles in 1-methyl-2-pyrrolidone (NMP) or in the room temperature ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Pyr14TFSI). This proposed methodology was successfully employed to prepare 2D and 3D with different aspect ratios electrodes. Both 2D and 3D materials were then used as anode materials. The 2D SiNPs anodes exhibit a high reversible capacity, which is close to 3500 mAh·g −1 at C/10. For a higher discharge rate, the capacity of the 2D anode is considerably improved by dispersing the nanoparticles in Pyr14TFSI instead of NMP solvent. In order to further improve the anode performances, graphene particles were added to the SiNPs suspension. The anodes prepared using this suspension method exhibit relatively low columbic efficiency during the first few cycles (less than 30%) and low reversible capacity (2800 mAh·g −1 at C/10). The 3D SiNPs (NMP) electrode shows a higher intensity during cyclic voltammograms and a better stability under galvanostatic cycling than the 2D SiNPs (NMP) electrode.

Conformal Coating by Liquid Route on Three-Dimensional Topology

“…The same procedure has been used by A. Vincent et al for precursors solutions preparation with polyester addition and not PEG or glycerol [26]. For adjust the viscosity, M. Gabard et al have add to Si nanoparticles the same polymer [27].…”

Sustainable Approach for the Development of TiO2-Based 3D Electrodes for Microsupercapacitors

“…These sols were magnetically stirred for a few minutes. The sols were deposited on the 2D or 3D Si substrate via spin-coating using a particular method we developed for other materials [51][52][53]. The procedure includes adding a polyester resin (PE-NORSODYNE S 2010 V) to the S1, S2 or S3 solutions in a 4:1 mass ratio.…”

“…A unique strategy for using the spin-coating technique to prepare 3D nanotextured electrodes with a conformal active material layer was reported previously [51][52][53]. This strategy based on soft chemical routes for preparing 3D electrodes is followed in this study to prepare TiO 2 -based electrodes for being used in microsupercapacitors operating in an organic electrolyte.…”

Facile formulation and fabrication of the cathode using a self-lithiated carbon for all-solid-state batteries

“…Electrode fabrication can be achieved using different techniques such as three-dimensional printing 7 , spin coating 8 , paste generating method 9 , freeze-casting 10 , electrospinning 11 , solvent-based electrostatic spray deposition 12 , solvent-free dry powder coating 13 , pulsed laser deposition 14 , sputtering deposition 15 , dry painting 16 , screen printing 17 , filtration 18 , extrusion 19 or recently the solvent-free roll-to-roll manufacturing technique 20 . However, the most commonly used fabrication technique is the so-called web-coating method or doctor-blading that consists to spread an electrode slurry on a current collector foil 21 .…”