Synthesis and properties of morphology controllable copper sulphide nanosheets for supercapacitor application

Fabrication of polyaniline/copper sulfide/poly(ethylene terephthalate) thread electrode for flexible fiber‐shaped supercapacitors

“…It has drawn worldwide attention to Li‐ion batteries, chemical sensors, catalyst, solar cells, and so on . There have been some reports that CuS was used as an electrode material for Li‐ion batteries and supercapacitors because of its metal‐like electronic conductivity and high theoretical capacity . This provides a good idea to use CuS‐coated PET fibers to prepare conductive fibers with high capacity.…”

Facile synthesis of novel CuCo2S4 nanospheres for coaxial fiber supercapacitors

“…However, oxides usually have low electrical conductivity, which limits their rate capability, another key parameter of supercapacitor. 5,6 In contrast, metal suldes have excellent chemical stability, rich valence, [7][8][9] and better electrical conductivity. [10][11][12] Compared to the single-component metal suldes, binary metal suldes show richer redox reactions and higher electronic conductivity, resulting in the enhancement of the electrochemical performances.…”

Approaching High‐Performance Supercapacitors via Enhancing Pseudocapacitive Nickel Oxide‐Based Materials

“…The substitution of S for O atoms, however, can form a more accommodating structure because S has lower electronegativity than that of O, which can avert the collapse of the structure by allowing expansion between the layers and promote the transport of electrons in the structure 52. Therefore, the corresponding sulfides are particularly attractive substitutes as pseudocapacitor materials due to their excellent chemical stability, rich valence,53 excellent electronic conductivity, and high electrochemical activity, which are propitious for speeding up the inherently sluggish oxygen reduction reaction 54. What is more, the crystal lattice spacing of sulfides is commonly larger than for their corresponding oxides, which is beneficial to fast and rich Faradaic reactions 55.…”

“…It benefits from the formation of nickel sulfide/oxide heterostructures, which may induce rich defects and vacancies at the interfaces, leading to more active sites. In addition, S 2− ions originating from Na 2 S react with metal ions via Kirkendall effects on the surfaces of NiO, which leads to various tunable morphologies, such as nanoparticles, NWs/nanotubes, and nanosheets 53b,60. For example, Liu et al61 prepared NiO/Ni 3 S 2 hetero‐nanosheets grown on nickel foam substrate via anion exchange reactions.…”