Hydrothermal fabrication of three-dimensional secondary battery anodes

Jinyun Liu, Hui Gang Zhang, Junjie Wang, Jiung Cho, James H. Pikul, Eric S. Epstein, Xingjiu Huang, Jinhuai Liu, William P. King, Paul V. Braun

Research output: Contribution to journalArticlepeer-review

Abstract

A generalized hydrothermal strategy for fabricating 3D battery electrodes was developed. Ni inverse opals coated with SnO2NPs or Co3O4 nanoplatelets, as well as SiO2 inverse opals coated with Fe3O4 were hydrothermally fabricated. For the Ni@SnO2 NP electrodes, the Ni inverse opal was fabricated on a tungsten foil. Before PS opal growth, the tungsten substrates were cleaned by ultrasonication in acetone, ethanol, and Millipore water for 30 min each. To enlarge the pore size of the final Ni inverse opal, and to enhance the bonding between PS spheres, the PS opal was sintered at 95°C for 3 h. The Ni inverse opal was cleaned with ethanol and deionized water, and dried in an oven. For the Ni@Co3O4 and SiO2@Fe3O4 electrodes, the Ni inverse opal was fabricated on gold-coated glass substrates. This Ni@SnO2NPs@SiO2 electrode retains a stable capacity of 615 mA h g even after 45 cycles, while still possessing a good C-rate performance. The Ni@Co3O4 and SiO2@Fe3 O4 electrodes also exhibit attractive properties including good C-rate performances and high Coulombic efficiencies. These results show that a hydrothermal strategy is a promising general approach for fabricating mesostructured battery electrodes.

Original languageEnglish (US)
Pages (from-to)7096-7101
Number of pages6
JournalAdvanced Materials
Volume26
Issue number41
DOIs
StatePublished - Nov 2014

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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