Accession Number : ADA621984


Title :   High Efficiency Flexible Battery Based on Graphene-carbon Nanotube Hybrid Structure


Descriptive Note : Final rept. 1 Jul 2011-30 Nov 2014


Corporate Author : FLORIDA INTERNATIONAL UNIV MIAMI


Personal Author(s) : Chen, Jiuhua ; Choi, Wonbong


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a621984.pdf


Report Date : 26 Feb 2015


Pagination or Media Count : 10


Abstract : The following achievements have been make during tb.is project: ** A binder-free interface controlled CNTs based anode on Cu were synthesized-very high 1st cycle capacity(- 2500 mAh/g), at 1C (- 900 mAh/g) and at 3C rates (767 mAhlg), and high capacity retention at 1C rate for 50 cycles. ** Demonstrated a large scale flexible graphene electrode ** Fabricated an array structure of 30 CNTs-graphene on transparent and flexible polyethylene terephthalate (PET) film through a simple lamination process- structural integrity, low contact resistance, excellent C-rate capability and high Coulombic efficiency of over 99%. ** Multi-layered structure of Gr/Si-QDs anodes have been successfully fabricated - initial discharge capacity of2869 n1.Ah/g at 0.5 C and 895 mAh/g, 1 Cover 200 cycles. ** Graduated 2 Ph.D. students, 2 undergraduate students. Students received awards from intemational conferences: Awarded Graduate Excellence in Materials Science (GEMS) Award American Ceramic.


Descriptors :   *CARBON NANOTUBES , *GRAPHENE , *QUANTUM DOTS , *STORAGE BATTERIES , ELECTROCHEMISTRY , ELECTRODES , FLEXIBLE STRUCTURES , HYBRID SYSTEMS , POLYETHYLENE TEREPHTHALATE


Subject Categories : Physical Chemistry
      Electrochemical Energy Storage
      Ceramics, Refractories and Glass
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE