Forcespinning: A new method for the mass production of Sn/C composite nanofiber anodes for lithium ion batteries

Abstract

The development of nanostructured anode materials for rechargeable Lithium-ion Batteries has seen a growing interest. We herein report the use of a new scalable technique, Forcespinning (FS) to produce binder-free porous Sn/C composite nanofibers with different Sn particle size loading. The preparation process involves the FS of Sn/PAN precursor nanofibers and subsequently stabilizing in air at 280 o C followed by carbonization at 800 o C under an inert atmosphere. The Sn/C composite nanofibers are highly flexible and were directly used as binder-free anodes for lithiumion batteries. The produced Sn/C composite nanofibers showed an improved discharge capacity of about 724 mAhg-1 at a current density of 100 mAg-1 for over 50 cycles compared to most nanofiber electrodes prepared by electrospinning and centrifugal spinning. The FS method clearly produces Sn/C nanofiber composite electrodes that have a high specific capacity and excellent cyclic performance, owing to the unique structure and properties of the nanofibers. The FS technology is thus a viable method for the large scale production of nano/micro fibers for battery electrodes, separators, and other applications. To the best of our knowledge, this is the first time to report results on the use of Forcespinning technology to produce composite nanofiber anodes for lithiumion batteries.

Coaxial MoS₂@carbon Hybrid Fibers: A Low-Cost Anode Material for High-Performance Li-Ion Batteries

“…It can be seen that the MoS2@carbon anode delivers an initial discharge and charge capacities of 1246 and 820 mAh·g −1 , respectively, which are higher than those of the pure MoS2 electrode (i.e., 1100 and 689 mAh·g −1 ) and comparable to the reported MoS2/graphene (i.e., 1160 and 896 mAh·g −1 ) [41]. The initial capacity loss is mainly caused by the irreversible processes such as the inevitable formation of a solid-electrolyte interface (SEI) film on the electrode surface and some side reactions between Li + and active materials [42][43][44][45][46]. The Coulombic efficiency is as high as 67.6% in the first cycle (vs. 62.6% for the pure MoS2), which increases to >98% from the second cycles.…”

PA6 Nanofibre Production: A Comparison between Rotary Jet Spinning and Electrospinning

“…Many reviews [2][3][4][5] into nanofibres have been published which investigate ever more uses for these amazing materials from many production methods. The applications that show significant promise for these materials include biomedical applications (drug delivery and tissue engineering scaffolds) [6][7][8][9], energy storage devices (lithium ion batteries) [10][11][12], and also air and water filtration applications [13][14][15]. Polymer nanofibres possess a very high surface area to volume ratio resulting in attractive applications where this property is advantageous.…”

Freestanding Nanoengineered [001] Preferentially Oriented TiO2 Nanosheets−Graphene Planarly Aligned Nanohybrids with Enhanced Li‐Storage Properties

“…At this rate, these three electrodes deliver specific capacities of 218.5, 211.9 and 205.0 mA h g −1 with first coulombic efficiency of 96.0 %, 95.4 %, and 92.8 %, respectively. The initial coulombic efficiency of our TiO 2 and TiO 2 ‐rGO paper electrode is much higher than most other transition metal oxides, alloys and carbon based anodes . Generally, the large initial capacity loss is a common phenomenon for metal oxide‐based anodes due to the formation of unstable solid‐electrolyte interphase (SEI) and poorly conductive Li 2 O.…”