Effect of Edge-Chemistry on Graphene-Based Hybrid Electrode Materials for Energy Storage Device

Abstract

Owing to the rapid climate change, a high-performance energy storage system (ESS) for efficient energy consumption has been receiving considerable attention. ESS, such as capacitors, usually has issues with the ion diffusion of electrode materials, resulting in a decrease in their capacitance. Notably, appropriate pore diameter and large specific surface area (SSA) may result in an effective ion diffusion. Therefore, graphene and multi-walled carbon nanotube (graphene@MWCNT) hybrid nanomaterials, with covalent bonds between the graphene and MWCNT, were prepared via an edge-chemistry reaction. The properties of these materials, such as high porosity, large SSA, and high electroconductivity, make them suitable to be used as electrode materials for capacitors. The optimal ratio of graphene to MWCNT can affect the electrochemical performance of the electrode material based on its physical and electrochemical properties. The supercapacitor using optimal graphene-based hybrid electrode material exhibited highest specific capacitance value as 158 F/g and excellent cycle stability.

Recent interlayer and separator design approaches for high‐performance Li–S batteries

“…In particular, mesoporous MWCNTs with the appropriate size can help with ion diffusion. 106 Lee et al created an interlayer composed of MWCNTs that performed well enough. 107 However, the researchers went further than a single carbon material and created a hybrid interlayer and separator to further improve the effectiveness.…”

“…MWCNT is a carbon‐based material with high electrical conductivity and porous structure. In particular, mesoporous MWCNTs with the appropriate size can help with ion diffusion 106 . Lee et al created an interlayer composed of MWCNTs that performed well enough 107 .…”