Utilization of metal-organic frameworks (MOFs) as electrodes for energy storage/conversion is challenging because of the low chemical stability and poor electrical conductivity of MOFs in electrolytes.Ananoscale MOF, Co 0.24 Ni 0.76 -bpa-200, possessing ultrahigh stability with uncommon semiconductor behavior (s = 4.2 10 À3 Sm À1 )w as fabricated. The MOF comprises ar obust hydrophobic paddlewheel and an optimized Co/Ni ratio,with consequent control over MOF size and the degree of conjugation of the coligand. AD FT study revealed that appropriate Ni 2+ doping reduces the activation energy of the system, thus providing ah igher carrier concentration, and the strongly delocalized N-donor ligand notably increases the metal-ligand orbital overlap to achieve efficient charge migration, leading to continuous through-bond (-CoNi-N-CoNi-) 1 conduction paths.These structural features endow the MOF with agood cycling stability of 86.5 %(10 000 cycles) and ahigh specific capacitance of 1927.14 Fg À1 among pristine MOF-based electrodes.
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