期刊
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
卷 215, 期 20, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201700936
关键词
ball-in-ball hollow nanospheres; binary transition metal sulfides; Kirkendall effect; supercapacitors
资金
- GRRC program of Gyeonggi province [GRRC Sungkyunkwan 2017-B03]
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2015R1C1A2A01054433]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) of the Republic of Korea [20153030012560]
- Ministry of Trade, Industry AMP
- Energy (MOTIE) of the Republic of Korea [20153030012560]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20153030012560] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2015R1C1A2A01054433] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Highly uniform and monodispersed CuCo2S4 ball-in-ball hollow nanospheres (HNSs) are successfully synthesized from CuCo-glycerate nanospheres (NSs) precursors via a facile two-step solvothermal process. The most influential parameter in anion exchange reaction between glycerate and sulfur ion is the solvothermal time, which plays a significant role in enhancing the structural and electrochemical properties. Impressively, CuCo2S4 ball-in-ball HNSs obtained through a sulfurization reaction time of 18h show high capacitance (442Fg(-1) at current density of 0.5Ag(-1)) and superior electrochemical stability (84.5% at 5Ag(-1) after 5000 cycles), which can realize high-performance materials for supercapacitors.
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