Fe₃O₄@Carbon Nanofibers Synthesized from Cellulose Acetate and Application in Lithium-Ion Battery

Abstract

Fe 3 O 4 @CNF anode material for Li-ion batteries (LIBs) was designed and fabricated using lyotropic cellulose acetate as the carbon nanofiber (CNF) phase and Fe(acac) 3 as the Fe 3 O 4 phase through the electrospinning approach. Because the CNFs could retard the change of Fe 3 O 4 volume during the electrochemical cycling and improve the electrical conductivity and the introduction of Fe 3 O 4 could offer a larger specific surface area and more mesopores to promote electrolyte penetration and Li + diffusion, the Fe 3 O 4 @CNFs electrode showed high reversible capacities (RCs) of 773.6 and 596.5 mAh g −1 after 300 cycles and capacity residuals of 98.0 and 99.0% at high current densities 1 and 2 A g −1 , respectively. This simple method to fabricate Fe 3 O 4 @ CNFs composite as anode material can be widely applied to fabricate metal oxides and bio-carbon composite nanofibers for highperformance energy storage materials.

Stabilization of Ultra-Small Stannic Oxide Nanoparticles in Optimizing the Lithium Storage Kinetics

“…Graphite is commercially applied as an anode material due to its stable and small working voltage. However, the relatively low theoretical capacity (372 mA h/g) cannot satisfy the current needs. − To increase the capacity, transition-metal oxides (e.g., Co 3 O 4, − MnO 2 , − Fe 3 O 4 , − Fe 2 O 3 , − and TiO 2 − ) have been widely investigated because their theoretical capacity is over 700 mA h/g, but their relatively higher working voltage (≥1.0 V) results in a lower battery voltage. Interestingly, SnO 2 has attracted much attention due to its higher theoretical capacity (1494 mA h/g) and much lower working potential (≤0.3 V).…”

The Role of Electrospun Nanomaterials in the Future of Energy and Environment

“…Recently, a simple coaxial electrospinning approach was adopted for the fabrication of Fe 3 O 4 @CNFs by using lyotropic cellulose acetate as the carbon nanofiber phase. Fe 3 O 4 @CNFs electrode showed high reversible capacities (RCs) of 773.6 and 596.5 mAh/g −1 after 300 cycles can be widely used for high performance energy storage materials [91]. In addition, Li et al prepared a flexible TiO 2 @C/N composite nanofibers through electrospinning, sol-gel transcription, low-temperature solution precipitation and subsequent carbonization process.…”

A study on Ti-doped Fe3O4 anode for Li ion battery using machine learning, electrochemical and distribution function of relaxation times (DFRTs) analyses

“…It is well documented that the structure of the electrode is difficult to maintain after several charge–discharge cycles 17 . Therefore, extensive studies have been carried out using Fe 3 O 4 nanoparticles modified with carbon in its various forms including sheet 18 , sphere 19 , nanotube 20 and carbon fiber 21 , to stabilize the cycle-life and rate capacity. Graphene based Fe 3 O 4 nanocomposites as anode material in LIBs show enhancement in electrochemical properties with a capacity loss of 5% after 100th cycles at 1 C rate 22 .…”