title: High Performance Particle/Polymer Nanofiber Anodes for Li-ion Batteries using Electrospinning.
abstract: Electrospun nanofiber mats containing carbon nanoparticles in a poly(vinylidene fluoride) binder were prepared and characterized as Li-ion battery anodes. The mats exhibited an initial capacity of 161 mAh g(-1) with 91.7% capacity retention after 510 cycles at 0.1 C (1 C=372 mA gcarbon (-1)). Whereas many nanoscale electrodes are limited to low areal and/or volumetric capacities, the particle/polymer nanofiber anodes can be made thick with a high fiber volume fraction while maintaining good rate capabilities. Thus, a nanofiber anode with a fiber volume fraction of 0.79 exhibits a volumetric capacity of 55 mAh cm(-3) at 2 C, which is twice that of a typical graphite anode. Similarly, thick nanofiber mats with a high areal capacity of 4.3 mAh cm(-2) were prepared and characterized. The excellent performance of electrospun anodes is attributed to electrolyte intrusion throughout the interfiber void space and efficient Li(+) transport between the electrolyte and carbon nanoparticles in the radial fiber direction.
authors.affiliation: Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA.
authors.forename: Ethan C
authors.initials: EC
authors.lastname: Self
authors.affiliation: Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA.
authors.forename: Emily C
authors.initials: EC
authors.lastname: McRen
authors.affiliation: Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235, USA. pn.pintauro@vanderbilt.edu.
authors.forename: Peter N
authors.initials: PN
authors.lastname: Pintauro
mesh_terms: D011211:Electric Power Supplies; D004560:Electricity; D004563:Electrochemistry; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D055595:Mechanical Phenomena; D057139:Nanofibers / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D011145:Polyvinyls / Q000737:chemistry*; D005465:Fluorocarbon Polymers
chemical_list: D008094:Lithium; D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers
keywords: Li-ion batteries; areal capacity; carbon; nanostructures; volumetric capacity