About the project
Currently commercially available lithium-ion battery (LIB) uses graphite as anode material which has a specific capacity around 372 mAhg-1 and is not enough for the growing demand of high-performance batteries. Silicon on the other hand has around 12 times higher specific capacity of 4200 mAhg-1 and is abundant in nature but the major challenge in implementation of Silicon as anode material in LIB are its large volume expansion during lithiation and de lithiation of ions causing pulverization, unstable solid electrolyte interface (SEI) which results in low columbic efficiency and a smaller number of charge discharge cycle.
The most probable solution for eliminating the above-mentioned issue is the use of Si nanoparticles in a composite with carbon. This project focuses on the same direction with the two most efficient technique: (i) Si Nanoparticles as core with graphene shell attached to graphene nano sheet. (ii) Si nanoparticles anode composite with triple modification of GO, CNT, CNF with the hope of achieving high specific capacity of anode over large number of charge discharge cycles.
Figure 1: Electrospinning of polyacrylo nitrile fibers having finely dispersed Si nanoparticles on graphene sheets and carbon nanotubes.
Figure 2: Picture showing ultrasonication of Si nanoparticles ethanol and deionized water.
Figure 3: Sample of Si nanoparticle on magnetic stirring with syringe infuser system injecting 2.57ml of TES over 12 hours.
Figure 4: Vacuum filter of Si@SiO2@GNS to drain out the water.
Project members
Mochan Mishra
Nihal Raj Shrivastava
About the client
Østfold University College
Supervisor
Anna-Lena Kjøniksen