Journal
ELECTROCHIMICA ACTA
Volume 137, Issue -, Pages 352-358Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.05.151
Keywords
alpha-Ni(OH)(2); Metal ions doping; Graphene; Ultrahigh capacitance; Supercapacitors
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Funding
- National Science Foundation of China [51077014, 21003028, 51202043]
- Fundamental Research funds for the Central Universities
- Program for New Century Excellent Talents in University [NCET-10-0050]
- Excellent Youth Foundation of Heilongjiang Province of China
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education, Heilongjiang University)
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Metal ions (Al3+ and Co2+) co-doped alpha-Ni(OH)(2)/graphene hybrid materials had been successfully synthesized by a facile chemical co-precipitation route. X-ray diffraction (XRD) patterns revealed the successful phase transmission from beta-Ni(OH)(2) to alpha-Ni(OH)(2) after Al3+ doping and the continuously enlarged interlayer distance of alpha-Ni(OH)(2) after subsequent Co2+ doping. Due to its large interlayer distance, mesoporous structure and highly conductively graphene (GNS), the as-obtained Al-Co co-doped alpha-Ni(OH)(2)/GNS composite (Al-Co-Ni/GNS) showed an ultrahigh specific capacitance of 2257 F g(-1) at 2 mV s(-1) as well as good cycling stability with 77% of the initial capacitance retention after 1000 cycles in 6 M KOH aqueous solution. (C) 2014 Elsevier Ltd. All rights reserved.
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