Synthesis of Double-Layer Nitrogen-Doped Microporous Hollow Carbon@MoS₂/MoO₂ Nanospheres for Supercapacitors

Abstract

In this work, a double-layer nitrogen-doped microporous hollow carbon@MoS/MoO nanosphere (NCs@MoS/MoO) is prepared via a facile method utilizing Mo-mediated in situ growth on polyaniline-coated polystyrene spheres and carbonization process. Because of its unique structure, the as-obtained NCs@MoS/MoO exhibits a high specific capacitance (569 F g at 1 A g) and excellent rate performance (54.8% capacitance retention) from 1 A g (569 F g) to 20 A g (312 F g) when directly used as a supercapacitor electrode. In a two-electrode system, it exhibits 81% capacitance retention and 91.4% Coulombic efficiency even after 5000 cycles at 5 A g. Therefore, the prepared NCs@MoS/MoO shows to be an outstanding material for supercapacitor electrodes.

Molybdenum Disulphide Heterointerfaces as Potential Materials for Solar Cells, Energy Storage, and Hydrogen Evolution

“…The carbon layers in this core–shell exhibit a superior and large area curves. Here the specific capacitances close to 569 F g −1 at 1 A g −1 with rate performance close to 54.8% were observed, as shown in Figure d . Similarly, such core–shells covered with CNTs also have been reported, which were rapidly deposited by a microwave approach.…”

“…d) The variation of specific capacitance as a function of current density of supercapcitor using NCs@MoS 2 /MoO 2. electrode. Reproduced with permission . Copyright 2018, American Chemical Society.…”

Designing an Advanced Supercapattery Based on CuCo2S4@Ni−Mo−S Nanosheet Arrays

“…It has been proved that the electrochemical behavior of an electrode is affected by the morphology and structure of its materials . Accordingly, scientists introduced different types of architectures such as nanowires, nanosheets, and nanotubes, which reflected high Cs owing to their exclusive porous networks and remarkable surface area (SA).…”

“…[27,28] It has been proved that the electrochemical behavior of an electrode is affected by the morphology and structure of its materials. [29,30] Accordingly, scientists introduced different types of architectures such as nanowires, [31] nanosheets, [32] and nanotubes, [33] which reflected high Cs owing to their exclusive porous networks and remarkable surface area (SA). Among which, nanosheet arrays have reflected excellent potential as desirable electrode materials for ESDs owing to their exclusive structural merits containing rich reaction sites and shortened diffusion pathways for quick charge and discharge.…”

3D Mesoporous Ni(OH)2/WS2 Nanofibers with Highly Enhanced Performances for Hybrid Supercapacitors

“…However, the obtainable specific capacity is still limited, and the related performance of SCs is far from expectation. Because of the high theoretical capacity of transition metal compounds, [23][24][25][26][27] some novel composite structures of TMDs have been widely reported as electrode materials for SCs, such as NCs@MoS 2 /MoO (569 F g À1 at 1 A g À1 ), [28] CoS 2 @MoS 2 -NG (198 F g À1 at A g À1 ), [29] and MoS 2 /Ni 3 S 4 (502.4 F g À1 at 2 A À1 ). [30] Unfortunately, the performance of these composite structures is not optimistic.…”