Facile Green Synthesis of Pseudocapacitance-Contributed Ultrahigh Capacity Fe₂(MoO₄)₃ as an Anode for Lithium-Ion Batteries

Abstract

The investigation into the use of earth-abundant elements as electrode materials for lithium-ion batteries (LIBs) is becoming more urgent because of the high demand for electric vehicles and portable devices. Herein, a new green synthesis strategy, based on a facile solid-state reaction with the assistance of water droplets' vapor, was conducted to prepare Fe 2 (MoO 4 ) 3 nanosheets as anode materials for LIBs. The obtained sample possesses a two-dimensional stacked nanosheet construction with open gaps providing a much higher surface area compared to the bulk sample conventionally synthesized. The nanosheet sample delivers an ultrahigh reversible capacity (1983.6 mA h g −1 ) at a current density of 100 mA g −1 after 400 cycles, which could be related to the contribution of pseudocapacitance. The enhancement in cyclability and rated performance with an interesting increased capacity could be caused by the effect of electrochemical milling and the in situ formation of metallic particles in its lithium-ion storage mechanism.

Oxygen Vacancy Engineering of Molybdenum Oxide Nanobelts by Fe Ion Intercalation for Aerobic Oxidative Desulfurization

“…According to the XRD results, the Fe 0.107 MoO x sample contained a lot of Fe 2 (MoO 4 ) 3 phase, which is suspected to be a reason for the decay of the catalytic effect. To verify this assumption, neat Fe 2 (MoO 4 ) 3 was prepared according to literature, and tested for its AODS activity, as shown in Figure b. The result revealed that Fe 2 (MoO 4 ) 3 was barely capable of catalytic activity, either.…”

The Role of Critical Raw Materials for Novel Strategies in Sustainable Secondary Batteries

“…In terms of green chemical synthesis, a novel approach based on water droplets vapor‐assisted solid‐state reaction has been implemented for the fabrication of Fe 2 (MoO 4 ) 3 nanosheets as anodes. [ 186 ] This methodology allows to get elevated surface area nanosheets with high reversible capacity at 100 mA g −1 under cycling (1983 mAh g −1 ) and may be caused by a pseudocapacitive effect. [ 186 ] Another promising material for anodes based on Li 2 Fe 3 O 5 microcrystals has been synthesized via single‐pot molten salt method for the obtention of octahedral crystals, a low cost method that is scalable and sustainable, [ 187 ] showing good values of capacity (604 mAh g −1 ) under cycling and high rate capability.…”

“…[ 186 ] This methodology allows to get elevated surface area nanosheets with high reversible capacity at 100 mA g −1 under cycling (1983 mAh g −1 ) and may be caused by a pseudocapacitive effect. [ 186 ] Another promising material for anodes based on Li 2 Fe 3 O 5 microcrystals has been synthesized via single‐pot molten salt method for the obtention of octahedral crystals, a low cost method that is scalable and sustainable, [ 187 ] showing good values of capacity (604 mAh g −1 ) under cycling and high rate capability. In addition, a green hydrothermal synthesis route has been reported to fabricate spherical SiO/hard carbon SOHC nanocomposites and its nitrogenates for anodes, showing enhanced electrochemical properties like high capacity (1398 mAh g −1 ) and very high cycling stability in the nitrogenated SOHCs (1248 mAh g −1 for 500 cycles).…”

Nano and Battery Anode: A Review

“…These cells are the opposite of galvanic cells (batteries), called electrolyte cells. In these cells, unlike the battery, we give energy to force a reaction that is not thermodynamically desirable [ 60 ].…”

“…It has been shown that using silicon nanotubes instead of nanowires is more effective. In nanotubes, the necessary space is provided for volume change on both sides of the inner and outer walls [34,[59][60][61]. In addition, nanotubes are usually thinner than nanowires, so transmitters are better, because silicon is a semiconductor and is also amorphous during the duty cycle due to stresses, it does not conduct well electronically during the duty cycle [47,48,54].…”