Template-free strategy for constructing N-doped hollow carbon sphere for broad operating potential supercapacitors

Dai, Juguo; Wang, Xiaohong; Xia, Long; Xie, Hongmei; Yang, Chang‐Fa; Wang, Ruipan; Xu, Yiting; Dai, Lizong

doi:10.1016/j.matchemphys.2022.126224

Cited by 5 publications

(1 citation statement)

References 38 publications

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“…As shown in Figure 2a and Figure S3a,b (Supporting Information), MoS 2 @PANI, MoS 2 @C, and MoS 2 display a hysteresis loop in the 0.5-1 relative pressure range characteristic of a type IV N 2 adsorption/desorption isotherms that indicate the presence of mesopores. [19] The specific Brunauer-Emmett-Teller (BET) surface area and the ratio of the mesopores volume to the total pore volume (V meso /V total ) of MoS 2 @PANI are 34.8 m 2 g −1 and ≈99%, respectively (Table S2, Supporting Information). In contrast, MoS 2 @C displays a larger specific surface area, 56.5 m 2 g −1 , but a lower ratio of mesopores, ≈54% (Table S2, Supporting Information).…”

Section: Microstructure and Chemical Compositionmentioning

confidence: 99%

MoS₂@Polyaniline for Aqueous Ammonium‐Ion Supercapacitors

Dai

Yang

et al. 2023

Advanced Materials

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Ammonium‐ion aqueous supercapacitors are raising notable attention owing to their cost, safety, and environmental advantages, but the development of optimized electrode materials for ammonium‐ion storage still lacks behind expectations. To overcome current challenges, here, a sulfide‐based composite electrode based on MoS2 and polyaniline (MoS2@PANI) is proposed as an ammonium‐ion host. The optimized composite possesses specific capacitances above 450 F g−1 at 1 A g−1, and 86.3% capacitance retention after 5000 cycles in a three‐electrode configuration. PANI not only contributes to the electrochemical performance but also plays a key role in defining the final MoS2 architecture. Symmetric supercapacitors assembled with such electrodes display energy densities above 60 Wh kg−1 at a power density of 725 W kg−1. Compared with Li+ and K+ ions, the surface capacitive contribution in NH4+‐based devices is lower at every scan rate, which points to an effective generation/breaking of H‐bonds as the mechanism controlling the rate of NH4+ insertion/de‐insertion. This result is supported by density functional theory calculations, which also show that sulfur vacancies effectively enhance the NH4+ adsorption energy and improve the electrical conductivity of the whole composite. Overall, this work demonstrates the great potential of composite engineering in optimizing the performance of ammonium‐ion insertion electrodes.

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Section: Microstructure and Chemical Compositionmentioning

confidence: 99%

MoS₂@Polyaniline for Aqueous Ammonium‐Ion Supercapacitors

Dai

Yang

et al. 2023

Advanced Materials

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Wrinkled Hollow Carbon Spheres with Adjustable Diameter for High‐Performance Supercapacitors

Zhao

Huang

et al. 2023

Chemistry An Asian Journal

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Creating more pleated and collapsed structures for carbon‐based electrode materials is an important measure to enhance the performance of supercapacitors. Herein, a polymer formed by the aldimine reaction of terephthalaldehyde and aminopropyltriethoxysilane was utilized as the carbon source, and tetraethoxysilane was added as a silica additive to achieve the wrinkled structure on hollow carbon spheres. The silica had a significant modulating effect on the structure of the obtained wrinkled hollow carbon sphere (WHCS), which displayed a visible pleated structure, hollow structure, high specific surface area, and pore volume. As an electrode material for supercapacitors, WHCS exhibits excellent performance with a capacitance of 312 F ⋅ g−1 and remarkable cycle life stability, demonstrating its great potential for use in supercapacitors.

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Yolk–shell structured carbon hollow spheres (CHS)/metal-organic framework nanoparticles-holding epoxy composite inheriting smart anti-corrosion feature

Pezeshk-Fallah,

Yari,

Mahdavian

et al. 2024

Applied Materials Today

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Template-free strategy for constructing N-doped hollow carbon sphere for broad operating potential supercapacitors

Cited by 5 publications

References 38 publications

MoS₂@Polyaniline for Aqueous Ammonium‐Ion Supercapacitors

MoS₂@Polyaniline for Aqueous Ammonium‐Ion Supercapacitors

Wrinkled Hollow Carbon Spheres with Adjustable Diameter for High‐Performance Supercapacitors

Yolk–shell structured carbon hollow spheres (CHS)/metal-organic framework nanoparticles-holding epoxy composite inheriting smart anti-corrosion feature

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Template-free strategy for constructing N-doped hollow carbon sphere for broad operating potential supercapacitors

Cited by 5 publications

References 38 publications

MoS2@Polyaniline for Aqueous Ammonium‐Ion Supercapacitors

MoS2@Polyaniline for Aqueous Ammonium‐Ion Supercapacitors

Wrinkled Hollow Carbon Spheres with Adjustable Diameter for High‐Performance Supercapacitors

Yolk–shell structured carbon hollow spheres (CHS)/metal-organic framework nanoparticles-holding epoxy composite inheriting smart anti-corrosion feature

Contact Info

Product

Resources

About

MoS₂@Polyaniline for Aqueous Ammonium‐Ion Supercapacitors

MoS₂@Polyaniline for Aqueous Ammonium‐Ion Supercapacitors