Carbon-coated honeycomb Ni-Mn-Co-O inverse opal: a high capacity ternary transition metal oxide anode for Li-ion batteries

Loading...
Thumbnail Image
Files
2539.pdf(2.1 MB)
Published Version
2539_1.pdf(2.42 MB)
Additional File
Date
2017-02
Authors
McNulty, David
Geaney, Hugh
O'Dwyer, Colm
Journal Title
Journal ISSN
Volume Title
Publisher
Nature Publishing Group
Published Version
Research Projects
Organizational Units
Journal Issue
Abstract
We present the formation of a carbon-coated honeycomb ternary Ni-Mn-Co-O inverse opal as a conversion mode anode material for Li-ion battery applications. In order to obtain high capacity via conversion mode reactions, a single phase crystalline honeycombed IO structure of Ni-Mn-Co-O material was first formed. This Ni-Mn-Co-O IO converts via reversible redox reactions and Li2O formation to a 3D structured matrix assembly of nanoparticles of three (MnO, CoO and NiO) oxides, that facilitates efficient reactions with Li. A carbon coating maintains the structure without clogging the open-worked IO pore morphology for electrolyte penetration and mass transport of products during cycling. The highly porous IO was compared in a Li-ion half-cell to nanoparticles of the same material and showed significant improvement in specific capacity and capacity retention. Further optimization of the system was investigated by incorporating a vinylene carbonate additive into the electrolyte solution which boosted performance, offering promising high-rate performance and good capacity retention over extended cycling. The analysis confirms the possibility of creating a ternary transition metal oxide material with binder free accessible open-worked structure to allow three conversion mode oxides to efficiently cycle as an anode material for Li-ion battery applications.
Description
Keywords
Li-ion battery applications , Nanoparticles , Honeycomb , Conversion mode oxides
Citation
McNulty, D., Geaney, H. and O’Dwyer, C. (2017) 'Carbon-Coated Honeycomb Ni-Mn-Co-O Inverse Opal: A High Capacity Ternary Transition Metal Oxide Anode for Li-ion Batteries', Scientific Reports, 7, pp. 42263. doi:10.1038/srep42263