Growth of vertically aligned Co₃S₄/CoMo₂S₄ ultrathin nanosheets on reduced graphene oxide as a high-performance supercapacitor electrode

Abstract

Ultrathin Co3S4/CoMo2S4 nanosheets vertically aligned on rGO sheets are prepared through a facile one-step hydrothermal method for supercapacitors.

Hydrothermal Synthesis of Hybrid Rod‐Like Hollow CoWO4/Co1−xS for High‐Performance Supercapacitors

“…But high C S retention indicates good stability and rate performances of the active material. The specific capacitance values calculated in the present work are comparable to those reported previously for CoWO 4 , Co 1−x S and related complexes . The C s (F ⋅ g −1 ) of Co 1−x S, CoWO 4 and CoWO 4 /Co 1−x S at different current densities are demonstrated in Table S3.…”

“…Figure (d) displays the CP curves of ASC at different current densities. All curves show the devices charge and discharge rapidly, indicating good electrochemical reversibility . According to Equation (1), at current densities of 1∼5 A ⋅ g −1 , the C s of supercapacitor was calculated as 103.1, 93.7, 86.1, 78.3 and 71.6 F⋅g −1 , respectively [Figure (e)].…”

Formation of a Flower‐Like Co−Mo−S on Reduced Graphene Oxide Composite on Nickel Foam with Enhanced Electrochemical Capacitive Properties

“…In Figure d and e, the distances of the adjacent lattice fringes were measured to be 0.282 nm and 0.571 nm, corresponding to the (004) and (002) lattice plane of CoMo 2 S 4 , while the interplanar distances of 0.231 nm can be indexed to (400) plane of Co 3 S 4 , demonstrating the ultra‐thin nanosheet is comprised of CoMo 2 S 4 and Co 3 S 4 nanoparticles. Referring to the EDS analysis, CoMo 2 S 4 and Co 3 S 4 exist in a ratio of about 1 : 1 in the CMS‐3@RGO/NF composite . In addition, the ultra‐thin nanosheet is comprised of a large number of nanoparticles, creating the unique structure via the interconnections between the CoMo 2 S 4 and Co 3 S 4 nanoparticles.…”

Mixed Metal Sulfides for Electrochemical Energy Storage and Conversion

“…In contrast, low-temperature and energy-saving solution-based methods have been demonstrated to be very powerful to obtain desired MMSs. In this regard, many solution-based synthesis methods including coprecipitation, [29,48] hot injection, [49][50][51][52][53][54] refluxing, [55][56][57][58][59] hydro/ solvothermal, [60][61][62][63][64] electrodeposition, [65][66][67][68][69] and self-template methods [27,28,31,32] have been well established to synthesize high-quality MMSs.…”

“…To understand the mechanism of the HER performance enhancement, DFT calculations were performed to verify the experimental results (Figure 11h) [266,267] HSCs: Recently, layered Mo-and W-based ternary sulfides have been assessed as electrode materials for HSCs. [64,268] For example, ultrathin CuWS 4 nanosheets have been explored as electrode materials for all-solid-state flexible HSCs. [268] In order to weaken the interlayer interaction, Li + ions are first intercalated into bulk Cu 2 WS 4 to form Li x Cu 2 WS 4 .…”