We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Core-Shell LiFePO<sub>4</sub>/Carbon-Coated Reduced Graphene Oxide Hybrids for High-Power Lithium-Ion Battery Cathodes.
- Authors
Ha, Sung Hoon; Lee, Yun Jung
- Abstract
Core-shell carbon-coated LiFePO4 nanoparticles were hybridized with reduced graphene (rGO) for high-power lithium-ion battery cathodes. Spontaneous aggregation of hydrophobic graphene in aqueous solutions during the formation of composite materials was precluded by employing hydrophilic graphene oxide (GO) as starting templates. The fabrication of true nanoscale carbon-coated LiFePO4-rGO (LFP/C-rGO) hybrids were ascribed to three factors: 1) In-situ polymerization of polypyrrole for constrained nanoparticle synthesis of LiFePO4, 2) enhanced dispersion of conducting 2D networks endowed by colloidal stability of GO, and 3) intimate contact between active materials and rGO. The importance of conducting template dispersion was demonstrated by contrasting LFP/C-rGO hybrids with LFP/C-rGO composites in which agglomerated rGO solution was used as the starting templates. The fabricated hybrid cathodes showed superior rate capability and cyclability with rates from 0.1 to 60 C. This study demonstrated the synergistic combination of nanosizing with efficient conducting templates to afford facile Li+ ion and electron transport for high power applications.
- Subjects
GRAPHENE; LITHIUM cells; NANOPARTICLE synthesis; LITHIUM cell electrodes; GRAPHENE oxide; LITHIUM compounds
- Publication
Chemistry - A European Journal, 2015, Vol 21, Issue 5, p2132
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201404952