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|Title:||A novel strategy to construct high performance lithium-ion cells using one dimensional electrospun nanofibers, electrodes and separators|
|Source:||Aravindan, V., Sundaramurthy, J., Kumar, P.S., Shubha, N., Ling, W.C., Ramakrishna, S., Madhavi, S. (2013-11-07). A novel strategy to construct high performance lithium-ion cells using one dimensional electrospun nanofibers, electrodes and separators. Nanoscale 5 (21) : 10636-10645. ScholarBank@NUS Repository. https://doi.org/10.1039/c3nr04486f|
|Abstract:||We successfully demonstrated the performance of novel, one-dimensional electrospun nanofibers as cathode, anode and separator-cum-electrolyte in full-cell Li-ion configuration. The cathode, LiMn2O4 delivered excellent cycle life over 800 cycles at current density of 150 mA g-1 with capacity retention of ∼93% in half-cell assembly (Li/LiMn2O4). Under the same current rate, the anode, anatase phase TiO2, rendered ∼77% initial reversible capacity after 500 cycles in half-cell configuration (Li/TiO2). Gelled electrospun PVdF-HFP exhibits liquid-like conductivity of ∼3.2 mS cm -1 at ambient temperature conditions (30°C). For the first time, a full-cell is fabricated with enitrely electrospun one-dimensional materials by adjusting the mass loading of cathode with respect to anode in the presence of gelled PVdF-HFP membrane as a separator-cum-electrolyte. Full-cell LiMn 2O4'gelled PVdF-HFP'TiO2 delivered good capacity characteristics and excellent cyclability with an operating potential of ∼2.2 V at a current density of 150 mA g-1. Under harsh conditions (16 C rate), the full-cell showed a very stable capacity behavior with good calendar life. This clearly showed that electrospinning is an efficient technique for producing high performance electro-active materials to fabricate a high performance Li-ion assembly for commercialization without compromising the eco-friendliness and raw material cost. © 2013 The Royal Society of Chemistry.|
|Appears in Collections:||Staff Publications|
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