Pseudocapacitive　materials　are　critical　to　the　development　of　supercapacitors　but　usually　suffer　from　poor　conductivity　and　bad　cycling　property.　Here,　we　describe　the　production　of　novel　graphene　oxide　nanofibers　(GONFs)　via　a　partial　oxidization　and　exfoliation　method　and　concurrently　report　that　highly　crystallized　Ni(OH)2　nanoplates　uniformly　grow　on　reduced　GONFs＇　outer　graphene　nanosheets　through　the　hydrothermal　method.　Because　of　their　unique　structure　with　high　electric　conductivity,　the　rGONF/Ni(OH)2　composite　exhibits　superior　specific　capacitance　(SC),　favorable　rate　capability　and　enhanced　cycling　stability　relative　to　other　composites　or　hybrids,　e.g.,　1433　F　g-1　at　5　mV　s-1　scan　rate,　986　F　g-1　at　40　mV　s-1,　and　90.5%　capacitance　retention　after　2000　cycles,　and　as-fabricated　rGONF/Ni(OH)2//active　carbon　asymmetric　supercapacitor　(ASC)　exhibits　a　remarkable　energy　density　and　a　85.3%　high　retention　(44.1　Wh　kg-1　at　467　W　kg-1　and　37.6　Wh　kg-1　at　3185　W　kg-1)　with　a　wide　potential　window　of　0-1.7　V.　Therefore,　this　study　shows　that　rGONFs　offers　an　exciting　opportunity　as　substrate　materials　for　supercapacior　applications　and　opens　up　a　new　pathway　for　design　and　manufacture　of　novel　supercapacitor　electrode　materials.　©　2016　American　Chemical　Society.