The　development　of　effective　and　high　capacitive　electrode　materials　for　supercapacitor　applications　is　highly　desired.　CoP　nanowires　are　prepared　by　hydrothermal-oxidation-phosphidation　method.　As　a　novel　electrode　material　for　supercapacitors　operating　in　alkaline　aqueous　electrolyte,　the　CoP　nanowire　electrode　exhibits　relatively　high　specific　capacitance　of　558　F　g(-1)　at　a　current　density　of　1　A　g(-1),　maintains　a　stable　cycling　life　with　98%　of　the　initial　capacitance　after　continuous　5000　cycles.　Furthermore,　the　CoP　nanowire　electrode　can　reach　up　to　a　high　energy　density　of　23.4　W　h　Kg(-1)　at　a　power　density　of　274　W　Kg(-1).　Moreover,　it　is　found　that　as-prepared　CoP　nanowire　electrode　delivers　substantially　enhanced　specific　capacitance　and　rate　performance　compared　with　the　Co3O4　nanowire　electrode.　These　results　demonstrate　that　the　CoP　nanowires　could　be　an　attractive　electrode　material　for　high-performance　supercapacitor　applications.