Conformal construction of polyaniline shell on cobalt oxide nanoflake core for enhanced Li ion storage
- Guangdong University of Technology, Guangzhou, 510006 (China)
- State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (China)
Highlights: • Construct non-axial polyaniline shell on Co{sub 3}O{sub 4} nanoflake core. • Non-axial core/shell arrays show enhanced Li storage properties. • Ultrathin PANI shell is favorable for fast ion and electron transfer. - Abstract: It is of great importance to controllably synthesize non-axial metal oxide/conducting polymers arrays for construction of high-performance electrochemical devices. In this work, we develop a facile electro-polymerization method to conformally coat interwoven polyaniline (PANI) shell on the preformed porous Co{sub 3}O{sub 4} nanoflakes forming non-axial Co{sub 3}O{sub 4}/PANI core/shell arrays. Uniform conductive PANI network and high porosity are realized in the non-axial core/shell arrays. As active materials for Li ion storage, the Co{sub 3}O{sub 4}/PANI core/shell arrays show superior high-rate performance including lower polarization, higher reactivity and better cycling life, as compared to the unmodified Co{sub 3}O{sub 4} nanoflake arrays. The capacity deterioration of the Co{sub 3}O{sub 4}/PANI arrays is restricted to a very lower level with a capacity of 871 mAh g{sup −1} at 0.25 A g{sup −1} after 100 cycles, better than the Co{sub 3}O{sub 4} counterpart (669 mAh g{sup −1} at 0.25 A g{sup −1}). This non-axial combination opens up a new door for developing advanced composite arrays for energy storage.
- OSTI ID:
- 22730416
- Journal Information:
- Materials Research Bulletin, Vol. 94; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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