Ni(OH)2/CoS heterostructure grown on carbon cloth for robust supercapacitor and methanol electrocatalytic oxidation

•Ni(OH)2/CoS hybrid is successfully immobilized on carbon cloth (Ni(OH)2/CoS /CC).•CoS mediation greatly boosts the electrochemical performance of Ni(OH)2/CC.•Ni(OH)2/CoS/CC has a ultra-high specific capacity and excellent capacity retention.•Ni(OH)2/CoS/CC//AC device possesses a marvelous energy density.•Ni(OH)2/CoS/CC has an enhanced catalytic activity toward methanol electro-oxidation.