期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 5, 页码 3258-3267出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b11001
关键词
supercapacitors; copper cobaltite; hydrothermal method; nanosheets; glucose sensor
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2013R1A1A2007365]
- Start-up Research Grant from Research & Development Office at University of Macau [SRG2015-00057-FST]
- National Research Foundation of Korea [2013R1A1A2007365] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Flower-like copper cobaltite (CuCo2O4) nanosheets anchored on graphite paper have been synthesized using a facile hydrothermal method followed by a postannealing treatment. Supercapacitor electrodes employing CuCo2O4 nanosheets exhibit an enhanced capacitance of 1131 F g(-1) at a current density of 1 A g(-1) compared with previously reported supercapacitor electrodes. The CuCo2O4 electrode delivers a specific capacitance of up to 409 F g(-1) at a current density of as high as 50 A g(-1), and a good long-term cycling stability, with 79.7% of its specific capacitance retained after 5000 cycles at 10 A g(-1). Furthermore, the as-prepared CuCo2O4 nanosheets on graphite paper can be fabricated as electrodes and used as enzymeless glucose sensors, which exhibit good sensitivity (3.625 mu A mu M-1 cm(-2)) and an extraordinary linear response ranging up to 320 mu M with a low detection limit (5 mu M).
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