Hierarchical porous 3D Ni3N-CoN/NC heterojunction nanosheets with nitrogen vacancies for high-performance flexible supercapacitor

Guo, Jian; Zhao, Hongbo; Yang, Zhongwei; Wang, Yawen; Liu, Xiuli; Wang, Longfei; Zhao, Zhenhuan; Ding, Longhua; Liu, Hong; Yu, Xin

doi:10.1016/j.nanoen.2023.108763

Cited by 33 publications

(7 citation statements)

References 71 publications

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“…In NiCoS/NiCo-OH, NiCoS, and NiCo-OH, both the XPS spectra of Ni 2p and Co 2p deliver two spin–orbit doublets and two satellites (marked as “Sat.″). The separation peaks at 856.10 and 873.70 eV for NiCoS/NiCo-OH can be ascribed to Ni 2p 3/2 and Ni 2p 1/2 (Figure a). , The separation peaks at 781.34 and 797.13 eV for NiCoS/NiCo-OH are attributed to Co 2p 3/2 and Co 2p 1/2 , respectively (Figure b). , The results indicate that Co and Ni in NiCoS/NiCo-OH are in the form of Co 2+ and Ni 2+ , respectively . Notably, the main peaks of Ni 2p 3/2 and Co 2p 3/2 for NiCoS/NiCo-OH are shifted by 0.27 and 0.31 eV to higher binding energies compared to that of NiCo-OH.…”

Section: Resultsmentioning

confidence: 84%

“…The TEM characterization result (Figure 2e) shows that there is intimate contact between NiCoS and NiCo-OH nanosheets, and the NiCo-OH nanosheets exhibit abundant mesopores at a diameter of 5.88 nm (Figure 2f), which is similar to the average pore size (7.6 nm) in the nitrogen 3a). 34,35 The separation peaks at 781.34 and 797.13 eV for NiCoS/NiCo-OH are attributed to Co 2p 3/2 and Co 2p 1/2 , respectively (Figure 3b). 36,37 The results indicate that Co and Ni in NiCoS/NiCo-OH are in the form of Co 2+ and Ni 2+ , respectively.…”

Section: Resultsmentioning

confidence: 99%

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NiCo-OH Nanosheets Coated with NiCoS Nanosheets for Supercapacitors and Alkaline Zinc Batteries

Huang,

Yao,

et al. 2024

ACS Appl. Nano Mater.

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Herein, a reverse bias heterojunction NiCoS/NiCo-OH with mesopores as the positive electrode was constructed by interface engineering. During the process of charging, the application of a positive bias potential by the external circuit to the reverse bias heterojunction NiCoS/NiCo-OH enhances the accumulation of charges within the NiCoS nanosheets. Under the modulation of the built-in electric field at the interface, the mesoporous interface of NiCo-OH acts as a receiver, collecting charges from NiCoS nanosheets and forming a channel leading to efficient ion diffusion and charge transfer. The specific capacity of the NiCoS/NiCo-OH electrode is up to 406.5 mA h g −1 at 1 A g −1 . It demonstrates ultrahigh rate performance, reaching 81.9% (50 A g −1 ) and 77.4% (100 A g −1 ). The hybrid supercapacitor NiCoS/ NiCo-OH//FNG shows a high energy density of 51.3 W h kg −1 at 1650 W kg −1 . Moreover, the capacity of the Zn||NiCoS/NiCo-OH battery reaches 419.1 mA h g −1 cathode at 1 A g −1 , and it can still maintain 73% (306.3 mA h g −1 cathode ) at 100 A g −1 .

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

NiCo-OH Nanosheets Coated with NiCoS Nanosheets for Supercapacitors and Alkaline Zinc Batteries

Huang,

Yao,

et al. 2024

ACS Appl. Nano Mater.

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“…The Pd ratio changes from 0.63:0.37 to 0.27:0.73 post-heat treatment, confirming increased Pd 2+ and PdO content, consistent with the XRD result. The deconvoluted peaks of O 1s are assigned at 530.6 eV for the Pd–O bond, revealing the PdO phase in the L-Pd/rGO composite. , The other O 1s peaks originated from carbon–oxygen bonds at 531.7 and 532.7 eV for the O–CO and C–O, respectively (Figure b). , Figure S7c compares the O 1s spectra of rGO, L-Pd/rGO, and H-Pd/rGO. In L-Pd/rGO, Pd doping introduces a Pd–O peak at 530.6 eV.…”

Section: Resultsmentioning

confidence: 95%

Laser-Induced Pd-PdO/rGO Catalysts for Enhanced Electrocatalytic Conversion of Nitrate into Ammonia

Ebenezer,

Lal,

Velayudham

et al. 2024

ACS Appl. Mater. Interfaces

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Electrochemical reduction of nitrate to ammonia (eNO 3 RR) is proposed as a sustainable solution for high-rate ammonia synthesis under ambient conditions. The complex, multistep eNO 3 RR mechanism necessitates the use of a catalyst for the complete conversion of nitrate to ammonia. Our research focuses on developing a novel Pd-PdO doped in a reduced graphene oxide (rGO) composite catalyst synthesized via a laserassisted one-step technique. This catalyst demonstrates dual functionality: palladium (Pd) boosts hydrogen adsorption, while its oxide (PdO) demonstrates considerable nitrogen adsorption affinity and exhibits a maximum ammonia yield of 5456.4 ± 453.4 μg/h/cm 2 at −0.6 V vs reversible hydrogen electrode (RHE), with significant yields for nitrite and hydroxylamine under ambient conditions in a nitrate-containing alkaline electrolyte. At a lower potential of −0.1 V, the catalyst exhibited a minimal hydrogen evolution reaction of 3.1 ± 2.2% while achieving high ammonia selectivity (74.9 ± 4.4%), with the balance for nitrite and hydroxylamine. Additionally, the catalyst's stability and activity can be regenerated through the electrooxidation of Pd.

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“…Given the escalating serious environmental challenges and the ongoing depletion of conventional fossil fuels, the pursuit of cleaner, more efficient, and renewable energy storage devices has emerged as a prominent research focus in contemporary scientific investigations. 1–6 The development of traditional capacitors and batteries is limited by their drawbacks, such as a large size, poor safety and poor cycle life. Supercapacitors, positioned as an emerging class of energy storage devices bridging the gap between conventional capacitors and batteries, have garnered significant attention due to their exceptional attributes including a high power density, energy storage capacity, extended cycle life, cost-effectiveness, and environmental sustainability.…”

Section: Introductionmentioning

confidence: 99%

Six polyoxotungstate-based transition metal compounds for electrochemical capacitor application and a comparative analysis of factors affecting capacitances

Peng,

Li,

et al. 2024

Dalton Trans.

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Six different polyoxotungstate-based transition metal complexes were synthesized, namely [Cu5(2,2’-bpy)5(μ2-Cl)2(PO4)2(H2O)2][HPW12O40]·2H2O (1), [Cu1.5(2,2-bpy)1.5(inic)2(H2O)1.5]3[H1.5PW12O40]2·16.25H2O (2), [Cu(2,2’-bpy)2]2[SiW12O40]·10H2O (3), [Zn(phen)3]2[PW12O40]·5H2O (4), [Zn(phen)2(H2O)]2[SiW12O40]·2H2O (5), and [Zn(2,2’-bpy)2]2[SiW12O40] (6). Compound 1 is based on [HPW12O40]2- anions, which...

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Hierarchical porous 3D Ni3N-CoN/NC heterojunction nanosheets with nitrogen vacancies for high-performance flexible supercapacitor

Cited by 33 publications

References 71 publications

NiCo-OH Nanosheets Coated with NiCoS Nanosheets for Supercapacitors and Alkaline Zinc Batteries

NiCo-OH Nanosheets Coated with NiCoS Nanosheets for Supercapacitors and Alkaline Zinc Batteries

Laser-Induced Pd-PdO/rGO Catalysts for Enhanced Electrocatalytic Conversion of Nitrate into Ammonia

Six polyoxotungstate-based transition metal compounds for electrochemical capacitor application and a comparative analysis of factors affecting capacitances

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