Cobalt pentlandite structured (Fe,Co,Ni)9S8: Fundamental insight and evaluation of hybrid supercapacitor

Liu, Ning; Peng, Zhijian; Tian, Ye; Liu, Haikun; Zhang, Yuanyuan; Deyneko, Dina V.; Mei, Lefu

doi:10.1016/j.apsusc.2022.155568

Cited by 15 publications

(6 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…observed at 731.6 and 720.2 eV are believed to correspond to Fe 2+ Sat. and Fe 3+ Sat., and similar to Co 2p, the characteristic peaks of Fe 2p 1/2 and Fe 2p 3/3 shifted to a lower energy level in V-CNFS/Ni 9 S 8 , indicating electron loss upon the introduction of vanadium atoms. − In terms of Ni 2p in Figure (d), two peaks were observed at 853.2 and 873.2 eV, corresponding to Ni 2p 3/2 and Ni 2p 1/2 , respectively, indicating the presence of Ni 2+ , while the peak located at 856.3 and 874.9 eV were assigned to Ni 2p 3/2 and Ni 2p 1/2 of Ni 3+ species, respectively. , Besides, the two peaks at 861.8 and 880.5 eV correspond to satellite peaks. Comparing V-CNFS/Ni 9 S 8 with CNFS, the binding energies of Ni 2p 1/2 in V-CNFS/Ni 9 S 8 displayed sequentially negative shifts like Co 2p and Fe 2p.…”

Section: Resultsmentioning

confidence: 95%

Internal and External Cultivation Strategy toward Efficient Electrochemical Oxygen Evolution in Cobalt Pentlandite

Liu,

Tian,

Mei

et al. 2023

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

Oxygen evolution reaction (OER) plays an important role in various renewable energy conversion scenarios for carbon neutralization. Constructing interface engineering and element doping has been extensively developed to tune the electrocatalytic OER activity of electrocatalysts. However, it is challenging to simultaneously conduct doping and interface engineering, and insights into the structure–property relationship are insufficient. Here, we designed the cobalt pentlandite OER catalyst (V-CNFS/Ni9S8) by an external and internal cultivation strategy that combines the external modulation of active sites of the catalyst surface through heterostructure construction and the internal modulation of the electronic structure of cobalt pentlandite through heteroatom doping. At the same time, this strategy also leads to the redistribution of interfacial electrons, thereby enhancing the catalytic activity. The elaborate electrocatalyst V-CNFS/Ni9S8 with optimized composition and typical hollow structure accelerates the electrochemical reactions, which can show an overpotential of 305 mV at 50 mA cm–2, and high stability for 72 h. This work reports an efficient OER electrocatalyst, which may open numerous opportunities to the development of cobalt pentlandite catalysts in renewable energy conversion and storage technology.

show abstract

Section: Resultsmentioning

confidence: 95%

Internal and External Cultivation Strategy toward Efficient Electrochemical Oxygen Evolution in Cobalt Pentlandite

Liu,

Tian,

Mei

et al. 2023

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Wo as Warburg element (open) is adopted to illuminate the diffusion method, where W-R is the diffusion resistance and W-T is correlated with the diffusion length and diffusion coefficient of ion. W-R and W-T values of the EF-CoS electrode are distinctly lower than that of bulk-CoS, suggesting the superior ion diffusion efficiency of EF-CoS. Clearly, the results reveal the rapid migration of ionic and electrons within the EF-CoS electrodes and between the electrode/electrolyte interfaces [31][32][33]. Electrochemical stability is an additional critical indicator in determining the quality of supercapacitor electrodes for many practical applications.…”

Section: Electrochemical Performancementioning

confidence: 95%

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

Tian

Sun

et al. 2023

Nanomaterials

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…36 However, the electrical conductivity and ion transfer rate of LDHs in supercapacitors are still relatively low and need to be further improved. 36,37 For the purpose of tackling the aforementioned drawbacks associated with LDHs, various approaches have been proposed, including the preparation of multi-transition metal hydroxide electrode materials with tailored microstructures by introducing other elements and fabricating binder-free monolithic electrodes. [38][39][40] Chen et al 41 successfully synthesized a unique structural morphology where the surface of organ-like Ti 3 C 2 /Mxene was coated with NiCoFe-THs with high electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

“…36 However, the electrical conductivity and ion transfer rate of LDHs in supercapacitors are still relatively low and need to be further improved. 36,37…”

Section: Introductionmentioning

confidence: 99%

Etching-induced ion exchange engineering of two-dimensional layered NiFeCo-based hydroxides for high energy charge storage

Xiong,

Cao,

Long

et al. 2024

Dalton Trans.

View full text Add to dashboard Cite

show abstract

Cobalt pentlandite structured (Fe,Co,Ni)9S8: Fundamental insight and evaluation of hybrid supercapacitor

Cited by 15 publications

References 64 publications

Internal and External Cultivation Strategy toward Efficient Electrochemical Oxygen Evolution in Cobalt Pentlandite

Internal and External Cultivation Strategy toward Efficient Electrochemical Oxygen Evolution in Cobalt Pentlandite

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

Etching-induced ion exchange engineering of two-dimensional layered NiFeCo-based hydroxides for high energy charge storage

Contact Info

Product

Resources

About