Core-branched NiCo2S4@CoNi-LDH heterostructure as advanced electrode with superior energy storage performance

Zhu, Yuanyi; An, Shengli; Sun, Xuejiao; Lan, Dawei; Cui, Jinlong; Zhang, Yongqiang; He, Wenxiu

doi:10.1016/j.cej.2019.123206

Cited by 92 publications

(50 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the characteristic peak corresponding to the A 1g stretching pattern is observed at 662 cm −1 . [12] Compared with NiCo 2 S 4 and Ru-NiCo 2 S 4 , the Raman peaks of NiCo 2 S 4-x and Ru-NiCo 2 S 4-x show a trend of moving to a lower direction, which can be attributed to the unit cell expansion caused by the generation of sulfur vacancies. [13] Finally, no additional Raman peaks are observed in the as-synthesized samples, further confirming that no impurities other than NiCo 2 S 4 are produced.…”

Section: Experimental Verification: Catalyst Synthesis and Characteri...mentioning

confidence: 99%

In Situ Electronic Redistribution Tuning of NiCo₂S₄ Nanosheets for Enhanced Electrocatalysis

Song

Gao

et al. 2021

Adv Funct Materials

140

View full text Add to dashboard Cite

Metal Ru and vacancy engineering play an important role in oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). However, there are few reports targeted on electrocatalysts by simultaneously employing these two strategies. Herein, theoretical calculation firstly predicts that Ru and VS can regulate the adsorption energy of OER/HER intermediates for NiCo2S4 electrocatalysts. Then, a facile solvothermal‐photochemical strategy is utilized to synthesis series NiCo2S4 samples: through filling the solvothermal‐created VS in NiCo2S4–x with Ru single atoms (Ru‐NiCo2S4–x) under ultraviolet irradiation as OER catalysts. Besides, Ru nanoclusters are introduced into NiCo2S4 without VS (Ru‐NiCo2S4) for HER. As a result, the OER exchange current density of NiCo2S4–x is prominently boosted after decoration of Ru single atom, which possesses an eminently low overpotential of 190 mV@50 mA cm−2, while Ru‐NiCo2S4 shows superior HER performance (32 mV@10 mA cm−2) compared with Ru‐NiCo2S4–x, surpassing most reported electrocatalytic materials. Moreover, Ru‐NiCo2S4–x//Ru‐NiCo2S4 exhibits remarkable stability and catalytic performance in the overall water splitting, with a cell voltage value of 1.46 V at 10 mA cm−2 in 1.0 m KOH. Bader charge analysis unravels the “restricted‐delocalized‐restricted” phenomenon between electrons promote the electron interactions, which in turn improves electrochemical performance.

show abstract

Section: Experimental Verification: Catalyst Synthesis and Characteri...mentioning

confidence: 99%

In Situ Electronic Redistribution Tuning of NiCo₂S₄ Nanosheets for Enhanced Electrocatalysis

Song

Gao

et al. 2021

Adv Funct Materials

140

View full text Add to dashboard Cite

show abstract

“…Figure 6F displays the Ragone plot associating the specific energy and power of this work to other similar devices on cobalt‐nickel layered double hydroxide/spinel composites in the literature. The plot shows that the specific energy and power of the device in this work is mostly better than other reported related work 18,30,40,49‐51 . The maximum power is transferred when the resistance of the load is equal to the ESR.…”

Section: Results and Analysismentioning

confidence: 42%

“…Figure 3 indicates the Raman spectrum of CN, MO/RGO-S-X@CN where X denotes the various mass loading of RGO-S. CN shows the E 1g at 479 cm À1 which reveals the presence of O-Ni-O and O-Co-O while F 2g and A 1g at 546 and 673 cm À1 respectively reveal the presence of Ni-OH and Co-OH bonds. 30 The peak at 645 cm À1 in MO/RGO-S-X@CN relates to the A 1g stretching of the Mn-O bond of the Hausmannite spinel. 31,32 The G and D peaks at 1595 and 1354 cm À1 , respectively confirm the successful integration of RGO-S in the composite's material.…”

Section: Microstructural Characterisation and Analysismentioning

confidence: 99%

“…The plot shows that the specific energy and power of the device in this work is mostly better than other reported related work. 18,30,40,[49][50][51] The maximum power is transferred when the resistance of the load is equal to the ESR. The maximum specific power P MAX of the device is obtained by employing equation 52 :…”

Section: Electrochemical Properties Of the Asymmetric Supercapacitormentioning

confidence: 99%

See 1 more Smart Citation

Two‐step electrodeposition of Hausmannite sulphur reduced graphene oxide and cobalt‐nickel layered double hydroxide heterostructure for high‐performance supercapacitor

Rutavi

Tarimo

Maphiri

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary Hausmannite/sulphur reduced graphene oxide (MO/RGO‐S) and cobalt‐nickel layered double hydroxide (CN) composite was synthesized through a two‐step electrodeposition approach. This process began with galvanostatic electrodeposition of MO/RGO‐Son a nickel foam, followed by cyclic voltammetry electrodeposition of CN. The inclusion of RGO‐S increases the electrical conductivity of the active material (AM) and its wettability while Mn3O4 (MO) enhances the pseudocapacitive active sites which help to increase the specific capacity of CN. The materials' electrochemical evaluations were carried out via three‐ and two‐electrode configurations using 2 M KOH electrolyte. An enhanced composite material (MO/RGO‐S‐50@CN) produced a phenomenal specific capacity of 582.1 mA h g−1 in a three‐electrode configuration at 0.5 A g−1. The device (MO/RGO‐S‐50@CN//CCBW) consisting of MO/RGO‐S‐50@CN and activated carbon from cooked chicken bone waste (CCBW) as positive and negative electrodes, respectively delivered specific energy of 56.0 Wh kg−1 with a specific power of 515.0 W kg−1 at a specific current of 0.5 A g−1. The device produced capacity retention of 85.1% and coulombic efficiency of 99.7% at 10 000 galvanostatic charge‐discharges cycles at 6 A g−1. Because of these excellent results, the fabricated materials demonstrated great potential for application as a high specific energy supercapacitor.

show abstract

“…Binary transition metal sulde composites are composed of binary transition metal suldes with oxides, 100 hydroxides, 101 suldes, [102][103][104] etc. The oxides, hydroxides, and suldes take place different electrochemical redox reactions, which enrich the species of electrochemical redox reactions for achieving higher capacity and rate performance.…”

Section: Binary Transition Metal Sulde Compositesmentioning

confidence: 99%

Overview of transition metal-based composite materials for supercapacitor electrodes

2020

View full text Add to dashboard Cite

show abstract

Core-branched NiCo2S4@CoNi-LDH heterostructure as advanced electrode with superior energy storage performance

Cited by 92 publications

References 56 publications

In Situ Electronic Redistribution Tuning of NiCo₂S₄ Nanosheets for Enhanced Electrocatalysis

In Situ Electronic Redistribution Tuning of NiCo₂S₄ Nanosheets for Enhanced Electrocatalysis

Two‐step electrodeposition of Hausmannite sulphur reduced graphene oxide and cobalt‐nickel layered double hydroxide heterostructure for high‐performance supercapacitor

Overview of transition metal-based composite materials for supercapacitor electrodes

Contact Info

Product

Resources

About

Core-branched NiCo2S4@CoNi-LDH heterostructure as advanced electrode with superior energy storage performance

Cited by 92 publications

References 56 publications

In Situ Electronic Redistribution Tuning of NiCo2S4 Nanosheets for Enhanced Electrocatalysis

In Situ Electronic Redistribution Tuning of NiCo2S4 Nanosheets for Enhanced Electrocatalysis

Two‐step electrodeposition of Hausmannite sulphur reduced graphene oxide and cobalt‐nickel layered double hydroxide heterostructure for high‐performance supercapacitor

Overview of transition metal-based composite materials for supercapacitor electrodes

Contact Info

Product

Resources

About

In Situ Electronic Redistribution Tuning of NiCo₂S₄ Nanosheets for Enhanced Electrocatalysis

In Situ Electronic Redistribution Tuning of NiCo₂S₄ Nanosheets for Enhanced Electrocatalysis