A　novel　Ni　foam-Ni3S2@Ni(OH)(2)-graphene　sandwich-　structured　electrode　(NF-NN-G)　with　high　areal　mass　loading　(8.33　mgcm(-2))　has　been　developed　by　sulfidation　and　hydrolysis　reactions.　The　conductivity　of　Ni3S2　and　Ni(OH)(2)　were　both　improved.　The　upper　layer　of　Ni(OH)(2),　covered　with　a　thin　graphene　film,　is　formed　in　situ　from　the　surface　of　the　lower　layer　of　Ni3S2,　whereas　the　Ni3S2　grown　on　Ni　foam　substrate　mainly　acts　as　a　rough　support　bridging　the　Ni(OH)(2)　and　Ni　foam.　The　graphene　stabilized　the　Ni(OH)(2)　and　the　electrochemical　properties　were　effectively　enhanced.　The　as-synthesized　NF-NN-G-5mg　electrode　shows　a　high　specific　capacitance　(2258　Fg(-1)　at　1　Ag-1　or　18.81　F　cm(-2)　at　8.33　mAcm(-2))　and　an　outstanding　rate　property　(1010　Fg(-1)　at　20　Ag-1　or　8.413　Fcm(-2)　at　166.6　mAcm(-2)).　This　result　is　around　double　the　capacitance　achieved　in　previous　research　on　Ni3S2@　Ni(OH)(2)/3　DGN　composites　(3DGN=　three-dimensional　graphene　network).　In　addition,　the　asfabricated　NF-NN-G-5mg　composite　electrode　has　an　excellent　cycle　life　with　no　capacitance　loss　after　3000　cycles,　indicating　a　potential　application　as　an　efficient　electrode.