Designed MnS/Co9S8 micro-flowers composites with serrate edges as high-performance electrodes for asymmetric supercapacitor

Liu, Hanmeng; Li, Zhen; Yao, Zhixia; Liu, Yaosheng; Zhang, Qifang; Sun, Yulong; Li, Zhuang

doi:10.1016/j.jcis.2019.05.024

Cited by 45 publications

(17 citation statements)

References 50 publications

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“…The CV curves of CoMCNFs@MnO 2 -2.5//CNFs are shown from 20 to 100 mV s –1 (Figure e). The CV curves behave similarly in shape, confirming that the ASC has excellent rate performance . The GCD curves are carried out from 0 to 1.45 V at 0.3–5 A g –1 (Figure f).…”

Section: Resultsmentioning

confidence: 96%

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MnO₂ Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

Sun

Bai

et al. 2019

ACS Appl. Energy Mater.

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In this study, MnO2 nanosheets grown on the multichannel carbon nanofibers containing amorphous cobalt oxide (CoMCNFs@MnO2) are prepared via electrospinning technology followed by carbonization and a facile chemical bath deposition process. The as-obtained CoMCNFs@MnO2 shows flexible features, which could serve as freestanding electrodes applied in supercapacitors. As a result, CoMCNFs@MnO2-2.5 exhibits the specific capacitance of 265 F g–1 at 0.5 A g–1, which surpasses those of their individual counterparts (135 and 143 F g–1 at 0.5 A g–1 for MCNFs@MnO2 and CoMCNFs, respectively). Moreover, After 10000 cycles, the specific capacitance of CoMCNFs@MnO2-2.5 also maintained 98.7%. Most importantly, the asymmetric supercapacitor (ASC) is assembled with CoMCNFs@MnO2-2.5 and the electrospinning carbon nanofibers (CNFs), which exhibit a high E of 19.27 Wh kg–1 with a P of 217.51 W kg–1 at 0.3 A g–1 and outstanding cycle ability of capacitance retention of 94.9% after 10000 cycles. This work paves a way to develop high-performance wearable asymmetric supercapacitors.

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Section: Resultsmentioning

confidence: 96%

“…The CV curves behave similarly in shape, confirming that the ASC has excellent rate performance. 52 The GCD curves are carried out from 0 to 1.45 V at 0.3−5 A g −1 (Figure 5f). All of the shape of the GCD curves is almost symmetric, indicative of the well-reversible redox reaction.…”

Section: Acs Applied Energy Materialsmentioning

confidence: 99%

MnO₂ Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

Sun

Bai

et al. 2019

ACS Appl. Energy Mater.

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“…By observing TEM images (Figure 2d–j), the diameters of CNFs and CNTs are about 400 nm and 20–50 nm, respectively, while the length of most of the CNTs is more than 1 μm. A typical straight CNT with a long strip catalyst particle at its center is featured in Figure 2f, in which the lattice fringes of the particle of 0.192 nm are well‐matched with the (511) plane of Co 9 S 8 , [19] which proves that Co 9 S 8 NPs can efficiently catalyze the growth of CNTs. Meanwhile, the catalyst NPs are wrapped by multi‐layer graphitized carbon layers of CNTs, which have obvious interplanar distances of 0.332 nm indexed to the graphitic carbon (002) plane [20] .…”

Section: Resultsmentioning

confidence: 79%

Sulfur‐Induced Growth of Coordination Polymer Derived‐Straight Carbon Nanotubes on Carbon Nanofiber Network for Zn‐Air Batteries

Wang

Chai

et al. 2021

Chemistry A European J

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Low‐cost heteroatom‐doped carbon nanomaterials have been widely studied for efficient oxygen reduction reaction and energy storage and conversion in metal‐air batteries. A Masson pine twigs‐like 3‐dimensional network construction of carbon nanofibers (CNFs) with abundant straight long Co, N, and S‐doped carbon nanotubes (CNTs) is developed by thermal treatment of Co‐based polymer coated onto polyacrylonitrile nanofiber network together with thiourea at 900 °C, denoted as CNFT‐Co9S8‐900. It is interesting to note that the introduction of a high concentration of sulfur does not lead to the complete toxicity of catalysts, but promotes the axial growth to selectively form straight CNTs instead of curly bamboo‐like CNTs. The highly graphitized in‐situ grown Co, N, S‐doped CNTs and the 3‐dimensional N‐doped CNF network provide both active catalytic sites and highly conductive paths, which are beneficial for oxygen reduction reaction (ORR). Thus, the optimal CNFT‐Co9S8‐900 performs the excellent ORR catalytic activity with a half‐wave potential of 0.84 V and a diffusion‐limited current density of 5.49 mA cm−2. Furthermore, the CNFT‐Co9S8‐900‐based Zn‐air devices also possess a high power density of 136.9 mW cm−2 better than commercial Pt/C.

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“…One method is to directly synthesize electrochemically active materials on conductive substrates such as nickel foam, copper foam, and carbon cloth by in situ growth. [8][9][10] This method can not only avoid the addition of a binder to increase the "dead weight" of the electrode, but also promote the transmission of electrons. Another noteworthy approach is to design electrode materials with a core-shell structure [11][12][13] and utilize the synergistic effect between the core and shell to achieve high specific capacitance.…”

Section: Introductionmentioning

confidence: 99%

Core–shell CuO@NiCoMn-LDH supported by copper foam for high-performance supercapacitors

et al. 2022

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Designed MnS/Co9S8 micro-flowers composites with serrate edges as high-performance electrodes for asymmetric supercapacitor

Cited by 45 publications

References 50 publications

MnO₂ Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

MnO₂ Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

Sulfur‐Induced Growth of Coordination Polymer Derived‐Straight Carbon Nanotubes on Carbon Nanofiber Network for Zn‐Air Batteries

Core–shell CuO@NiCoMn-LDH supported by copper foam for high-performance supercapacitors

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Designed MnS/Co9S8 micro-flowers composites with serrate edges as high-performance electrodes for asymmetric supercapacitor

Cited by 45 publications

References 50 publications

MnO2 Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

MnO2 Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

Sulfur‐Induced Growth of Coordination Polymer Derived‐Straight Carbon Nanotubes on Carbon Nanofiber Network for Zn‐Air Batteries

Core–shell CuO@NiCoMn-LDH supported by copper foam for high-performance supercapacitors

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MnO₂ Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors

MnO₂ Nanosheets Grown on Multichannel Carbon Nanofibers Containing Amorphous Cobalt Oxide as a Flexible Electrode for Supercapacitors