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Author Zhao, Saihua ♦ Guo, Jinxin ♦ Jiang, Fei ♦ Su, Qingmei ♦ Du, Gaohui
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ANODES ♦ CARBON ♦ COBALT OXIDES ♦ DIFFUSION ♦ DIFFUSION LENGTH ♦ ELECTROCHEMISTRY ♦ ELECTRON MICROSCOPY ♦ ELECTRONS ♦ ENERGY STORAGE ♦ FERRATES ♦ HYDROTHERMAL SYNTHESIS ♦ LITHIUM ION BATTERIES ♦ NANOWIRES ♦ PHASE STABILITY ♦ POROUS MATERIALS
Abstract Highlights: • Hierarchal CoFe{sub 2}O{sub 4} nanowire arrays are directly grown on flexible carbon cloth. • Porous CoFe{sub 2}O{sub 4} nanowires are composed of many nanocrystals of 20–40 nm. • CoFe{sub 2}O{sub 4} nanowire arrays exhibit excellent rate capability and cycling stability. • Integrated CoFe{sub 2}O{sub 4}/carbon cloth electrodes show high flexibility and areal capacity. - Abstract: A three-dimensional CoFe{sub 2}O{sub 4} nanowire array on carbon cloth was fabricated with a hydrothermal method together with a post-annealing treatment. As a binder-free and flexible anode material for LIBs, it showed an improved electrochemical performance with high cycling stability and excellent rate capability. It exhibited an initial discharge capacity of 1615 mAh g{sup −1} and retained a reversible capacity of about 1204 mAh g{sup −1} after 200 cycles at a specific current of 500 mA g{sup −1}. The high capacity, outstanding rate performance and cycling stability can be attributed to the special configuration of hierarchal porous CoFe{sub 2}O{sub 4} nanowires on carbon cloth, which possess many advantages like short diffusion length, easy strain relaxation and fast electron transport. Moreover, the integrated CoFe{sub 2}O{sub 4} nanowires/carbon cloth electrode shows high flexibility and high areal capacity (2.41 mAh cm{sup −2}), which makes it suitable for use as a binder-free anode to build flexible LIBs.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-07-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 79


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