Biotemplate Synthesis of Fe3O4/Polyaniline for Supercapacitor

Fundamental Insight into the Degradation Mechanism of an rGO-Fe3O4 Supercapacitor and Improving Its Capacity Behavior via Adding an Electrolyte Additive

“…Transition-metal oxides (TMOs) such as NiO, Co 3 O 4 , and TiO 2 have shown remarkable capability in electrochemical performance and electric capacitance. − In addition, TMO nanostructured compounds combined with graphene, carbon nanotubes, and fullerenes have attracted attention in the field of energy storage. − Among them, nanosized magnetite (Fe 3 O 4 ) exhibits potentially attractive properties in applications such as high-efficiency energy storage devices and supercapacitors with high specific capacitance. To solve the problem of the low conductivity and the agglomeration of Fe 3 O 4 nanoparticles (NPs) strategically, carbon-based materials (such as graphene) are commonly used to improve the electrochemical properties of Fe 3 O 4 electrode in an aqueous environment due to the low dynamic viscosity of aqueous electrolytes. − The reduced graphene oxide (rGO)-Fe 3 O 4 composites prepared by Huang can reach a high specific capacity of 1065 mAh·g –1 at a current density of 0.1 A·g –1 . The prepared rGO-Fe 3 O 4 carbon (AC) lithium-ion capacitor has an excellent energy density of 98.8 Wh·kg –1 and a power density of 3.4 kW·kg –1 .…”

Advances in pseudocapacitive and battery-like electrode materials for high performance supercapacitors

“…Iron oxides (FeO, Fe 2 O 3 , and Fe 3 O 4 ) have generated a great deal of research interest in energy storage applications due to their high theoretical capacity, easy availability, and low cost. [139][140][141][142][143][144][145][146][147][148][149][150][151][152][153][154][155][156] However, it has been observed that FeO is unstable and hard to isolate, and for these reasons, mainly Fe 2 O 3 and Fe 3 O 4 have been considered for SC applications. These oxides have been synthesized in different morphologies, including nanowires, nanoparticles, thin lms, nanorods, nanotubes, microspheres, etc.…”

A sequential process to synthesize Fe3O4@MnO2 hollow nanospheres for high performance supercapacitors

“…Constructing or hybridizing with other materials is demonstrated to be one of the most effective ones. [23][24][25] Recently, the combination of MnO 2 and iron oxide has been extensively researched to further boost the electrochemical properties of iron oxide. 26,27 Zhu et al reported MnO 2 microspheres doped with Fe 3 O 4 nanoparticles with a hierarchical porous structure, which yielded a high specific capacitance of 448 F g À1 at 5 mV s À1 .…”