Dual-defect surface engineering of bimetallic sulfide nanotubes towards flexible asymmetric solid-state supercapacitors

Lee, Kang; Zhang, Mengyao; Zhang, Jian; Liu, Shude; Zhang, Nan; Yao, Wenqian; Yan, Yonghong; Luo, Chen; Gong, Zhiwei; Wang, Chaolun; Zhou, Xiaofeng; Wu, Xing‐Long

doi:10.1039/d0ta08979f

Cited by 157 publications

(100 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PXRD pattern showed that in comparison to the NiS 2 , the peaks of NCoSC electrode aremore intense, indicating the homogeneous distribution of Co in NiS 2 and NiCoS 2 . In addition to the above peaks, a small peak also appeared at 2θ ≈ 18 • , which corroborated well with the characteristic (111) plane of NiCo 2 S 4 [5,13,17]. A broad hump at 2θ ≈ 23 to 26 • was detected in the PXRD pattern of all the samples due to the (002) plane of coated carbon.…”

Section: Pxrd Pattern Analysissupporting

confidence: 79%

Influence of Transition Metals (Cu and Co) on the Carbon-Coated Nickel Sulfide Used as Positive Electrode Material in Hybrid Supercapacitor Device

et al. 2021

View full text Add to dashboard Cite

Herein, a facile, environment-friendly and cost-effective approach was followed for the preparation of metal sulfide-based supercapacitor electrodes. The effect of transition metal interrogation on the morphology and electrochemical performance of carbon-coated nickel sulfide composite electrode was investigated. Physicochemical characterization showed that the enhancement in electrical conductivity and electrochemical reaction sites with the introduction of copper (Cu) and cobalt (Co) was due to the variation in morphology. Fast ionic transformation and improvement in the number of redox active sites might improve the supercapacitor performance. The electrochemical experiment showed that the NCoSC electrode exhibited the highest capacitance value of ~760 F g−1 at 2 A g−1 current density as compared to the NCuSC and NSC electrodes. Therefore, a hybrid supercapacitor (HSC) device was fabricated by using NCoSC as the positive electrode and thermally reduced graphene oxide (TRGO) as the negative electrode. The fabricated device demonstrated maximum energy density of ~38.8 Wh Kg−1 and power density of 9.8 kW Kg−1. The HSC device also showed ~89.5% retention in specific capacitance after 10,000 charge–discharge cycles at 12 A g−1 current density. So, the tuning of electronic and physical properties by the introduction of Cu and Co on nickel sulfide improved the supercapacitor performance.

show abstract

Section: Pxrd Pattern Analysissupporting

confidence: 79%

Influence of Transition Metals (Cu and Co) on the Carbon-Coated Nickel Sulfide Used as Positive Electrode Material in Hybrid Supercapacitor Device

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The lowered capacitance at higher current densities is also attributed to the insufficient electrolyte ions diffusion kinetics across the micropores owing to the narrow pore size at higher operating current densities, the reduced accumulation amount of electrolyte ions onto porous electrode interface results in the decrement in specific capacitance 56 . The presence of dual hetero atoms such as O and P greatly reduces such resistance and increases the pore utilization to achieve a high capacitance 57 . The Ragone plot of the device in KOH electrolyte calculated from discharge curves at different current densities is displayed in Figure 4e.…”

Section: Please Do Not Adjust Marginsmentioning

confidence: 99%

Celery-derived porous carbon materials for superior performance supercapacitors

Liu

et al. 2021

Nanoscale Adv.

View full text Add to dashboard Cite

show abstract

“…Kang et al. [ 127 ] incorporated P dopant and created S vacancies on the surface of NiCo 2 S 4 nanotubes via anion exchange and phosphidation processes, which reduced oxidation states of Ni and Co active sites and improved electrical conductivity. Partial substitution of S with P also increased the covalent property of the derived electrode, which promoted charge transfer kinetics and enriched faradaic redox chemistry.…”

Section: Strategies For Improving Electrochemical Activity Of Tmcsmentioning

confidence: 99%

Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials

Lyu

Antink

Kim

et al. 2021

Small

View full text Add to dashboard Cite

Flexible and stretchable supercapacitors (FS‐SCs) are promising energy storage devices for wearable electronics due to their versatile flexibility/stretchability, long cycle life, high power density, and safety. Transition metal compounds (TMCs) can deliver a high capacitance and energy density when applied as pseudocapacitive or battery‐like electrode materials owing to their large theoretical capacitance and faradaic charge‐storage mechanism. The recent development of TMCs (metal oxides/hydroxides, phosphides, sulfides, nitrides, and selenides) as electrode materials for FS‐SCs are discussed here. First, fundamental energy‐storage mechanisms of distinct TMCs, various flexible and stretchable substrates, and electrolytes for FS‐SCs are presented. Then, the electrochemical performance and features of TMC‐based electrodes for FS‐SCs are categorically analyzed. The gravimetric, areal, and volumetric energy density of SC using TMC electrodes are summarized in Ragone plots. More importantly, several recent design strategies for achieving high‐performance TMC‐based electrodes are highlighted, including material composition, current collector design, nanostructure design, doping/intercalation, defect engineering, phase control, valence tuning, and surface coating. Integrated systems that combine wearable electronics with FS‐SCs are introduced. Finally, a summary and outlook on TMCs as electrodes for FS‐SCs are provided.

show abstract

Dual-defect surface engineering of bimetallic sulfide nanotubes towards flexible asymmetric solid-state supercapacitors

Abstract: Nickel cobalt sulfide (NiCo2S4) has been known as a promising battery-type material for electrochemical energy storage. However, the slow kinetics of charge transfer and ion diffusion, as well as the...

Cited by 157 publications

References 70 publications

Influence of Transition Metals (Cu and Co) on the Carbon-Coated Nickel Sulfide Used as Positive Electrode Material in Hybrid Supercapacitor Device

Influence of Transition Metals (Cu and Co) on the Carbon-Coated Nickel Sulfide Used as Positive Electrode Material in Hybrid Supercapacitor Device

Celery-derived porous carbon materials for superior performance supercapacitors

Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials

Contact Info

Product

Resources

About