Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7732995 | Journal of Power Sources | 2015 | 7 Pages |
Abstract
Electrospinning is utilized to prepare composite fiber Li-ion battery anodes containing titania and carbon nanoparticles with a poly (acrylic acid) binder. The electrospun material exhibits a stable charge/discharge capacity with only 5% capacity fade over 450 cycles at 0.5 C. Compared to a conventional slurry cast electrode of the same composition, the electrospun anode demonstrates 4-fold higher capacity retention (31% vs. 7.9%) at a charge/discharge rate of 5 C. Electrospinning is also used to prepare ultrathick anodes (>1 mm) with areal capacities up to 3.9 mAh cmâ2. Notably, the thick electrodes exhibit areal capacities of 2.5 and 1.3 mAh cmâ2 at 1 C and 2 C, respectively. Electrospun anodes with densely packed fibers have a 2 C volumetric capacity which exceeds that of the slurry cast material (21.2 and 17.5 mAh cmâ3, respectively). The excellent performance of the electrospun anodes is attributed to interfiber voids which provide complete electrolyte intrusion, a large electrode/electrolyte interface, and short Li+ transport pathways between the electrolyte and titania nanoparticles.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Ethan C. Self, Ryszard Wycisk, Peter N. Pintauro,