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Improvement of capacitance activity for Cu‐doped Ni‐based metal–organic frameworks by adding potassium hexacyanoferrate into KOH electrolyte
Author(s) -
Chen Xiaoye,
Wu Xuemin,
Guo Hongxu,
Fu Wei
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5193
Subject(s) - supercapacitor , capacitance , electrolyte , chemistry , nanomaterials , doping , potassium , metal organic framework , chemical engineering , electrode , hydrothermal circulation , hydrothermal synthesis , metal , inorganic chemistry , nanotechnology , materials science , optoelectronics , organic chemistry , adsorption , engineering
Cu‐doped Ni‐based metal–organic frameworks (MOFs) nanomaterials fabricated through a one‐pot hydrothermal reaction were characterized, and their performance as supercapacitor electrode materials was further studied for the first time. The results indicated that the doping of foreign metals and the introduction of K 3 [Fe(CN) 6 ] in the KOH electrolyte significantly improve the performance of the supercapacitor. The results indicated that the Ni 2.6 Cu 0.4 MOFs material shows the highest specific capacitance (1282 F g −1 at 1 A g −1 in mixed 2 M KOH and 0.1 M K 3 [Fe(CN) 6 ]) and optimal capacitance retention (85.7% after 2000 cycles). This work provides a feasible optimization strategy for the construction of MOFs‐based supercapacitor electrode materials with excellent performance, and also provides a reliable experimental and theoretical basis for practical industrial production.