Ultrafine FeF₃·0.33H₂O Nanocrystal-Doped Graphene Aerogel Cathode Materials for Advanced Lithium-Ion Batteries

Abstract

FeF 3 has been extensively studied as an alternative positive material owing to its superior specific capacity and low cost, but the low conductivity, large volume variation, and slow kinetics seriously hinder its commercialization. Here, we propose the in situ growth of ultrafine FeF 3 • 0.33H 2 O NPs on a three-dimensional reduced graphene oxide (3D RGO) aerogel with abundant pores by a facile freeze drying process followed by thermal annealing and fluorination. Within the FeF 3 •0.33H 2 O/RGO composites, the three-dimensional (3D) RGO aerogel and hierarchical porous structure ensure rapid diffusion of electrons/ions within the cathode, enabling good reversibility of FeF 3 . Benefiting from these advantages, a superior cycle behavior of 232 mAh g −1 under 0.1C over 100 cycles as well as outstanding rate performance is achieved. These results provide a promising approach for advanced cathode materials for Li-ion batteries.

3D Porous MoS2-Decorated Reduced Graphene Oxide Aerogel as a Heterogeneous Catalyst for Reductive Transformation Reactions

“…Further, other properties like thermal stability and hydrophobicity lead to ease in the regeneration of catalyst. GA-based nanocomposites, as heterogeneous catalysts, can serve as a better option due to the high order of stability , to a wide range of temperatures and pressures than that of homogeneous catalysis and also generating minimal waste and having simple recovery and recycling properties …”

“…Further, other properties like thermal stability and hydrophobicity lead to ease in the regeneration of catalyst. GA-based nanocomposites, as heterogeneous catalysts, can serve as a better option due to the high order of stability 29,30 to a wide range of temperatures and pressures than that of homogeneous catalysis and also generating minimal waste and having simple recovery and recycling properties. 31 Various reports are already available related to the catalytic performance of MoS 2 −graphene nanocomposites, such as fast adsorption of organic dyes, 32 removal of oil from wastewater, 33 high-performance supercapacitors, 34 removal of electromagnetic interference pollution, 35 photocatalytic reductions of CO 2 , 36 and water splitting.…”