Metal organic framework derived P-doping CoS@C with sulfide defect to boost high-performance asymmetric supercapacitors

Wang, Qiufan; Qu, Zaiting; Chen, Shenghui; Zhang, Daohong

doi:10.1016/j.jcis.2022.03.053

Cited by 40 publications

(17 citation statements)

References 40 publications

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“…The S 2p spectra (Fig. 1e) shows that peaks at 162.6 eV can be classi ed as S 2p 3/2 , which is attributed to metal-sulfur bonds [20]. And 164.2 eV can be assigned to the S 2p 1/2 , it could be representative of sulfur ions at low coordination normally associated with S-vacancies [32].…”

Section: Resultsmentioning

confidence: 98%

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Influence of S doping on cobalt hydroxide and nitrogen-doped carbon dots of supercapacitor electrode materials

Lin

Hong

Chen

et al. 2023

Preprint

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Recently, the supercapacitor has been used as a type of energy storage application. In this work, cobalt hydroxide adorned with nitrogen-doped carbon dots (NC) is synthesized by a hydrothermal approach. Then Co(OH)2/NC is modified by sodium sulfide to obtain S-Co(OH)2/NC, which shows an excellent specific capacitance of 730 F g− 1 at 1 A g− 1 (much higher than that of pristine Co(OH)2/NC (592 F g− 1 at 1 A g− 1)). An asymmetric supercapacitor (ASC) is assembled by S-Co(OH)2/NC (as a positive electrode) and GA/NC (as a negative electrode), which presents a specific energy density as high as 39.59 Wh kg− 1 with a power density of 639 W kg− 1. Also, the ACS manifests extraordinary cycle stability (75% capacitance retention after 8500 cycles). According to the electrochemical performance, it can be inferred that S-Co(OH)2/NC has a great practical application value in supercapacitor devices.

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Section: Resultsmentioning

confidence: 98%

“…Heteroatom doping alters electronic density by affecting the structure [20]. In addition to doping carbon quantum dots, it is reported that the S vacancy into electrode materials can enhance the electrochemical properties [21].…”

Section: Introductionmentioning

confidence: 99%

Influence of S doping on cobalt hydroxide and nitrogen-doped carbon dots of supercapacitor electrode materials

Lin

Hong

Chen

et al. 2023

Preprint

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“…Based on this, we obtain Figure 4 a–d corresponding to the valence binding energy peaks of several main elements XPS data graph after our date processing on behalf of sulfur (S 2p), carbon (C 1s), oxygen (O 1s) and cobalt (Co 2p), respectively. In Figure 4 a, the characteristic peaks of C-S or C-

appeared in the binding energy of 164 eV, 165 eV and 167.8 eV [ 31 ], while there are characteristic peaks of spin orbits corresponding to S 2

and S 2

at 161.9 eV and 163.2 eV, respectively [ 36 , 38 , 39 ]. The position and area of each binding energy peak of C 1s show that it mainly exists in the form of C-C/C=C [ 37 , 40 , 41 ], and at 285.3 eV may represent C-S binding energy [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

“…For the material doped with metal cobalt, the diffraction peaks at these two positions are greatly weakened or even disappear, indicating that the magnesium ions in the resin may be replaced by cobalt ions in the process of impregnating cobalt ions. The characteristic diffraction peaks of cobalt sulfide appear at the diffraction angles of 30.5 • , 35.2 • , 47.7 • and 54.5 • , respectively, which correspond to the (100), (101), ( 102) and (110) crystal planes [28,36] of the standard card JCPDS: 48-0826, respectively. According to the variation trend of peak type and cobalt concentration and the position of diffraction peak, we can infer that metal cobalt sintered on the surface, or inside of carbon ball, in the form of cobalt sulfide.…”

Section: Materials Characterizationmentioning

confidence: 99%

Efficient Activation of Peroxymonosulfate by Cobalt Supported Used Resin Based Carbon Ball Catalyst for the Degradation of Ibuprofen

Zhou

Zhang

et al. 2022

Materials

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The extensive use of ibuprofen (IBU) and other pharmaceuticals and personal care products (PPCPs) causes them widely to exist in nature and be frequently detected in water bodies. Advanced catalytic oxidation processes (AOPs) are often used as an efficient way to degrade them, and the research on heterogeneous catalysts has become a hot spot in the field of AOPs. Among transitional metal-based catalysts, metal cobalt has been proved to be an effective element in activating peroxymonosulfate (PMS) to produce strong oxidizing components. In this study, the used D001 resin served as the matrix material and through simple impregnation and calcination, cobalt was successfully fixed on the carbon ball in the form of cobalt sulfide. When the catalyst was used to activate persulfate to degrade IBU, it was found that under certain reaction conditions, the degradation rate in one hour could exceed 70%, which was far higher than that of PMS and resin carbon balls alone. Here, we discussed the effects of catalyst loading, PMS concentration, pH value and temperature on IBU degradation. Through quenching experiments, it was found that SO4− and ·OH played a major role in the degradation process. The material has the advantages of simple preparation, low cost and convenient recovery, as well as realizing the purpose of reuse and degrading organic pollutants efficiently.

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“…To be specific, cobalt sulfide is considered a potential supercapacitor electrode candidate because of its intrinsically multiple valence states of Co atoms, diverse morphologies and high reversible redox activity. The biggest drawbacks restricting the application of its electrochemical performance, though, are its low electrical conductivity and slow ion transport kinetics compared to carbon materials [9,10].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Performance of Metallic CoS-Based Supercapacitor by Cathodic Exfoliation

Tian

Sun

et al. 2023

Nanomaterials

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Two-dimensional nanomaterials hold great promise as electrode materials for the construction of excellent electrochemical energy storage and transformation apparatuses. In the study, metallic layered cobalt sulfide was, firstly, applied to the area of energy storage as a supercapacitor electrode. By a facile and scalable method for cathodic electrochemical exfoliation, metallic layered cobalt sulfide bulk can be exfoliated into high-quality and few-layered nanosheets with size distributions in the micrometer scale range and thickness in the order of several nanometers. With a two-dimensional thin sheet structure of metallic cobalt sulfide nanosheets, not only was a larger active surface area created, but also, the insertion/extraction of ions in the procedure of charge and discharge were enhanced. The exfoliated cobalt sulfide was applied as a supercapacitor electrode with obvious improvement compared with the original sample, and the specific capacitance increased from 307 F∙g−1 to 450 F∙g−1 at the current density of 1 A∙g−1. The capacitance retention rate of exfoliated cobalt sulfide enlarged to 84.7% from the original 81.9% of unexfoliated samples while the current density multiplied by 5 times. Moreover, a button-type asymmetric supercapacitor assembled using exfoliated cobalt sulfide as the positive electrode exhibits a maximum specific energy of 9.4 Wh∙kg−1 at the specific power of 1520 W∙kg−1.

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Metal organic framework derived P-doping CoS@C with sulfide defect to boost high-performance asymmetric supercapacitors

Cited by 40 publications

References 40 publications

Influence of S doping on cobalt hydroxide and nitrogen-doped carbon dots of supercapacitor electrode materials

Influence of S doping on cobalt hydroxide and nitrogen-doped carbon dots of supercapacitor electrode materials

Efficient Activation of Peroxymonosulfate by Cobalt Supported Used Resin Based Carbon Ball Catalyst for the Degradation of Ibuprofen

Enhanced Electrochemical Performance of Metallic CoS-Based Supercapacitor by Cathodic Exfoliation

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