Abstract
Conductive additives are receiving much attention as they can play an important role in the challenging intrinsic properties of Si anode in lithium-ion batteries. Hence, these carbonaceous materials not only facilitate electrical percolating pathways but also secure structural integrity within the electrode. However, the intrinsic properties of conventional conductive materials such as point-to-point contact of carbon spheres and severe entanglement of CNT make it difficult to achieve an efficient conductive network in the electrode. Here, we use well-dispersed CNT ink as an additive for a homogeneous conductive network in silicon microparticle/graphite (SiMP/Gra) electrodes. By using the CNT ink with Super P particles, a unique hybrid conductive network, composed of 0D and 1D carbon materials, was formed in the SiMP/Gra electrode. To find an optimized conductive structure, a series of electrodes with different weight ratios between CNT and Super P was prepared and electrochemically tested. Through the investigation, the 1 wt% of CNT ink addition makes the best electrochemical performance. The superior performance of SiMP/Gra CNT ink 1.0 wt% electrode can be explained by the optimized hybrid conductive network with Super P cluster bridges between CNT strands. Furthermore, the optimal CNT-Super P hybrid network effectively grasps SiMP/Gra particles and connects electrode components, resulting in improved electrical conductivity and structural integrity upon repeated cycles. The described CNT ink additive concept and the hybrid conductive network could be useful suggestions in electrode design, considering conductive structure and electrochemical performance.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.