Cobalt–nickel sulfide nanosheets modified by nitrogen-doped porous reduced graphene oxide as high-conductivity cathode materials for supercapacitor

Hong, Xianyong; Li, Jinghua; Zhu, Guisheng; Xu, Hui; Zhang, Xiuyun; Zhao, Yunyun; Zhang, Jian; Yan, Dongliang; Yu, Aibing

doi:10.1016/j.electacta.2020.137156

Cited by 35 publications

(14 citation statements)

References 62 publications

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“…The radius of semicircle represents charge transfer resistance, and the slope of straight line refers diffusion resistance, that is the rate of electrolyte ion transfer. 36 Semicircle of NiCo 2 S 4 @PPy-50 product is significantly smaller than those of other three electrodes. Its slope is the largest, indicating that it possesses the smallest resistance.…”

Section: Resultsmentioning

confidence: 77%

Realizing high performance flexible supercapacitors by electrode modification

et al. 2021

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Section: Resultsmentioning

confidence: 77%

Realizing high performance flexible supercapacitors by electrode modification

et al. 2021

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“…As shown in Figure 9a, in the absence of hydrogen and oxygen evolution, the operating voltage window can be extended to 1.6 V. Therefore, the CV test of NiCo‐LDH‐CQDs‐20//AC ASC at different scanning rates was carried out under a 1.6 V voltage window (Figure 9b). With the increase of scanning rate, the curve remains in good shape, indicating that it could adapt to the current potential response of large scanning rate [34] . The GCD curves of NiCo‐LDH‐CQDs‐20//AC ASC at different current densities are shown in Figure 9(c‐d), all curves show typical pseudocapacitance performance.…”

Section: Resultsmentioning

confidence: 90%

“…With the increase of scanning rate, the curve remains in good shape, indicating that it could adapt to the current potential response of large scanning rate. [34] The GCD curves of NiCo-LDH-CQDs-20//AC ASC at different current densities are shown in Figure 9(c-d), all curves show typical pseudocapacitance performance. The continuous cycling stability of the NiCo-LDH-CQDs-20//AC ASC is evaluated at the current density of 7 A g À 1 for 2000 cycles (Figure 9e), the specific capacitance retention is about 82.7 %, which may be due to the swelling of the electrode materials during repeated charging and discharging process, resulting in structural changes.…”

Section: Chemelectrochemmentioning

confidence: 95%

Biomass‐Derived Carbon Quantum Dots‐Induced Self‐Assembly of 3D Networks of Nickel‐Cobalt Double Hydroxide Nanorods as High‐Performance Electrode Materials for Supercapacitors

Zhuang

Wang

et al. 2022

ChemElectroChem

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The nickel-cobalt double hydroxide hybrid materials induced by biomass-derived carbon quantum dots (CQDs) have a threedimensional network structure of cross-linked nanorods. The results demonstrate that the functional groups on the CQDs derived from pomelo peel promoted the nucleation and confined the growth of nickel-cobalt double hydroxide. The assynthesized NiCo-LDH-CQDs-20 exhibits the high specific capacitance of 1814 F g À 1 at 1 A g À 1 . When the current density is increased to 15 A g À 1 , the specific capacitance value remains 75.5 % of the initial one, which indicates that NiCo-LDH-CQDs-20 has an extremely high-rate performance. Furthermore, the asymmetric supercapacitor NiCo-LDH-CQDs-20//AC provides a high energy density of 46.47 Wh kg À 1 in 2 M KOH solution with a power density of 800 W kg À 1 and maintains an initial specific capacitance of 82.7 % after 2000 cycles. Therefore, this study provides a promising approach for the development of anode active materials in supercapacitor energy storage devices.

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“…In the low frequency region, the slope of the straight line shows the ion diffusion resistance. Among the three samples, α-Fe 2 O 3 @MnO 2 sample presents the largest slope, which expresses fast diffusion of ions in electrolyte [34]. The intersection with the real axis represents the equivalent resistance (Rs) [35].…”

Section: Resultsmentioning

confidence: 99%

Micro/Nano Energy Storage Devices Based on Composite Electrode Materials

Niu

Shang

2022

Nanomaterials

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It is vital to improve the electrochemical performance of negative materials for energy storage devices. The synergistic effect between the composites can improve the total performance. In this work, we prepare α-Fe2O3@MnO2 on carbon cloth through hydrothermal strategies and subsequent electrochemical deposition. The α-Fe2O3@MnO2 hybrid structure benefits electron transfer efficiency and avoids the rapid decay of capacitance caused by volume expansion. The specific capacitance of the as-obtained product is 615 mF cm−2 at 2 mA cm−2. Moreover, a flexible supercapacitor presents an energy density of 0.102 mWh cm−3 at 4.2 W cm−2. Bending tests of the device at different angles show excellent mechanical flexibility.

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Cobalt–nickel sulfide nanosheets modified by nitrogen-doped porous reduced graphene oxide as high-conductivity cathode materials for supercapacitor

Cited by 35 publications

References 62 publications

Realizing high performance flexible supercapacitors by electrode modification

Realizing high performance flexible supercapacitors by electrode modification

Biomass‐Derived Carbon Quantum Dots‐Induced Self‐Assembly of 3D Networks of Nickel‐Cobalt Double Hydroxide Nanorods as High‐Performance Electrode Materials for Supercapacitors

Micro/Nano Energy Storage Devices Based on Composite Electrode Materials

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