Nickel sulfide wrapped by porous cobalt molybdate nanosheet arrays grown on Ni foam for oxygen evolution reaction and supercapacitor

Synthesis of porous flower‐like Ni‐Co‐Mo‐S nanostructures on Ni foam for battery‐supercapacitor hybrid devices

“…For Ni‐Co‐Mo‐S/NF, the peaks were shifted slightly due to the little polarization, as shown in Figure B. It was illustrated that Ni‐Co‐Mo‐S/NF displayed good rate performance …”

“…In Figure D, Mo 3d spectrum consisted of Mo 3d 5/2 (231.8 eV) and Mo 3d 3/2 (234.9 eV). And the energy separation between the two peaks was 3.1 eV, which was attributed to Mo 6+ . From Figure E, it was found that a metal‐oxygen bond and crystal water existed, which were related to the peaks at 530.3 and 532.2 eV, respectively .…”

“…The galvanostatic charge‐discharge (GCD) curves were tested to study the store charge ability of as‐prepared products with the potential window of 0 ~ 0.45 V (vs Hg/HgO). In Figure C, it was revealed that the three as‐prepared electrodes were all battery‐type electrodes due to the nonlinear GCD curves . Compared with others, the longer discharge time of Ni‐Co‐Mo‐S/NF indicated that its capacitance was higher.…”

“…From Figure S2(c), the diffraction peaks at 26.5 and 29.2 were ascribed to Co 1.2 MoO 4.2 ·1.3H 2 O (JCPDS. 14‐0087) . As displayed in Figure , it was illustrated a series of peaks at 34.2, 45.5, 53.2, 60.5, and 78.3, corresponding to the (101), (102), (110), (103), and (104) planes of the NiS 1.03 (JCPDS.…”

“…In Figure F, the peaks of S 2p 1/2 (164.3 eV) and S 2p 3/2 (162.8 eV) suggested the presence of metal sulfides sufficiently. Except for that, the peak of 169.1 eV was linked to SO 4 2− caused by the oxidation of sulfur surfaces exposed to air …”