PVP-induced synergistic engineering of interlayer, self-doping, active surface and vacancies in VS4 for enhancing magnesium ions storage and durability

Ding, Shiqi; Dai, Xin; Li, Zhenjiang; Wang, Chunsheng; Meng, Alan; Wang, Lei; Li, Guicun; Huang, Jianfeng; Li, Shaoxiang

doi:10.1016/j.ensm.2022.02.023

Cited by 56 publications

(33 citation statements)

References 55 publications

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“…For the S 2p spectrum (Figure g), the two peaks situated at 164.0 and 162.8 eV are associated with 2p 1/2 and 2p 3/2 of S 2 2– , respectively . The split separation for S 2p is a little bit larger than the theoretical value, which is caused by the generation of unsaturated coordination S induced by the bonding of V and C or sulfur vacancies . The C 1s spectrum in Figure h was deconvoluted into five peaks at 284.8, 285.8, 286.7, 287.8, and 289.0 eV, relating to the C–C, C–N, C–O, C=O, and O–C=O bonds, respectively .…”

Section: Resultsmentioning

confidence: 90%

“…34 The split separation for S 2p is a little bit larger than the theoretical value, which is caused by the generation of unsaturated coordination S induced by the bonding of V and C or sulfur vacancies. 35 The C 1s spectrum in Figure 2h 36 The C−N bond configuration corresponds to the pyridine-N or graphite-N, indicating that N was doped successfully with C in the NGA structure. Moreover, the existence of two minor peaks of C=O and C−O means that in the process of generating aerogels, ethylenediamine with plenty of −NH 2 groups reduces some oxygen-containing groups.…”

Section: Resultsmentioning

confidence: 99%

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Experimental and Theoretical Indagation of Binder-Free N-Graphene Coupling Vanadium Tetrasulfide Aerogel Cathode for Promoting Aqueous Zn-Ion Storage

Zhou

Chen

et al. 2023

ACS Appl. Energy Mater.

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Aqueous Zn-ion batteries (AZIBs) have acquired great attention owing to their nontoxicity, high safety, and sustainable Zn resources. Nevertheless, the deficiency of applicable electrode materials hampers the advancement of the electrochemical performance for AZIBs. Herein, a N-graphene coupling vanadium tetrasulfide aerogel (VS4@NGA) forming a sponge-like heterostructured architecture is constructed through a hydrothermal and a following freeze-dehydration approach. The unique composite is evaluated as a binder-free electrode for AZIBs and presents competitive zinc storage performance (two times improvement in specific capacity over pristine VS4). The calculations based on density functional theory and electrochemical experimental studies demonstrate that the interconnected porous architecture, meliorated electrical conductivity, decreased adsorption energy, and Zn2+ diffusion energy barrier driven by the combination of VS4 with NGA synergistically realize the enhanced energy storage dynamics and exceptional electrochemical properties of the composite. The reversible Zn ion insertion/extraction reaction mechanism of the composite is clarified by a sequence of ex-situ elemental and structural characterizations. Moreover, the soft-packaged batteries assembled using the composite aerogel suggest the practical application ability of the material in electronic devices. This research offers a simple avenue for constructing a binder-free aerogel-based cathode, which provides a progressive paradigm for the advancement of AZIBs.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Experimental and Theoretical Indagation of Binder-Free N-Graphene Coupling Vanadium Tetrasulfide Aerogel Cathode for Promoting Aqueous Zn-Ion Storage

Zhou

Chen

et al. 2023

ACS Appl. Energy Mater.

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“…The electrochemical impedance spectroscopy (EIS) results suggest that 8-NiS 2 hollow nanospheres have a lower resistance after 10 cycles than before cycling (Figure S10), explaining the increase in capacity upon cycling. As illustrated in Table S1, the electrode of 8-NiS 2 hollow nanospheres demonstrates obvious advantages in terms of capacity and cycles, indicating the successful rational design of the electrodes. ,,,− …”

Section: Resultsmentioning

confidence: 97%

High-Performance NiS₂ Hollow Nanosphere Cathodes in Magnesium-Ion Batteries Enabled by Tunable Redox Chemistry

et al. 2022

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Two-dimensional metal dichalcogenides have demonstrated outstanding potential as cathodes for magnesium-ion batteries. However, the limited capacity, poor cycling stability, and severe electrode pulverization, resulting from lack of void space for expansion, impede their further development. In this work, we report for the first time, nickel sulfide (NiS 2 ) hollow nanospheres assembled with nanoparticles for use as cathode materials in magnesium-ion batteries. Notably, the nanospheres were prepared by a one-step solvothermal process in the absence of an additive. The results show that regulating the synergistic effect between the rich anions and hollow structure positively affects its electrochemical performance. Crystallographic and microstructural characterizations reveal the reversible anionic redox of S 2− /(S 2 ) 2− , consistent with density functional theory results. Consequently, the optimized cathode (8-NiS 2 hollow nanospheres) could deliver a large capacity of 301 mA h g −1 after 100 cycles at 50 mA g −1 , supporting the promising practical application of NiS 2 hollow nanospheres in magnesiumion batteries.

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“…Taking the very few commercially available APC electrolytes as an example, the active MgCl + /Mg 2 Cl 3 + ions cannot be dissociated into a single Mg 2+ Cl bonds. 17 Therefore, rational design of suitable cathode materials that can effectively dissociate large solvated electrolyte ions such as MgCl + /Mg 2 Cl 3 + at the interface and ensure fast electrode reaction kinetics is of significant importance for the future development of high-performance MIBs.…”

Section: Introductionmentioning

confidence: 99%

Enabling Ultrafast Single Mg²⁺ Insertion Kinetics of Magnesium-Ion Batteries via In Situ Dynamic Catalysis and Re-equilibration Effects

Deng

Shi

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Magnesium-ion batteries (MIBs) have great potential in large-scale energy storage field with high capacity, excellent safety, and low cost. However, the strong solvation effect of Mg2+ will lead to the formation of solvated ions in electrolytes with larger size and sluggish diffusion/reaction kinetics. Here, the concept of interfacial catalytic bond breaking is first introduced into the cathode design of MIBs by hybriding MoS2 quantum dots with VS4 (VS4@MQDs) as the cathode. The “in situ dynamic catalysis and re-equilibration” effects can catalyze the Cl–Mg bond breaking and trigger single Mg2+ insertion/extraction chemistries, which can significantly accelerate the diffusion and reaction kinetics, as verified by the decreased diffusion energy barriers (0.26 eV for Mg2+ vs 2.47 eV for MgCl+) and fast diffusion coefficient. Benefitting from these dynamic catalysis effects, the constructed VS4@MQD-based MIBs deliver a high discharge capacity of ∼120 mA h g–1 at 200 mA g–1 and a long-term cyclic stability of 1000 cycles at 1 A g–1. The improved performance and detailed characterizations well prove that the active ions in MIBs change from MgCl+/Mg2Cl3+ to Mg2+ with fast kinetics.

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PVP-induced synergistic engineering of interlayer, self-doping, active surface and vacancies in VS4 for enhancing magnesium ions storage and durability

Cited by 56 publications

References 55 publications

Experimental and Theoretical Indagation of Binder-Free N-Graphene Coupling Vanadium Tetrasulfide Aerogel Cathode for Promoting Aqueous Zn-Ion Storage

Experimental and Theoretical Indagation of Binder-Free N-Graphene Coupling Vanadium Tetrasulfide Aerogel Cathode for Promoting Aqueous Zn-Ion Storage

High-Performance NiS₂ Hollow Nanosphere Cathodes in Magnesium-Ion Batteries Enabled by Tunable Redox Chemistry

Enabling Ultrafast Single Mg²⁺ Insertion Kinetics of Magnesium-Ion Batteries via In Situ Dynamic Catalysis and Re-equilibration Effects

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PVP-induced synergistic engineering of interlayer, self-doping, active surface and vacancies in VS4 for enhancing magnesium ions storage and durability

Cited by 56 publications

References 55 publications

Experimental and Theoretical Indagation of Binder-Free N-Graphene Coupling Vanadium Tetrasulfide Aerogel Cathode for Promoting Aqueous Zn-Ion Storage

Experimental and Theoretical Indagation of Binder-Free N-Graphene Coupling Vanadium Tetrasulfide Aerogel Cathode for Promoting Aqueous Zn-Ion Storage

High-Performance NiS2 Hollow Nanosphere Cathodes in Magnesium-Ion Batteries Enabled by Tunable Redox Chemistry

Enabling Ultrafast Single Mg2+ Insertion Kinetics of Magnesium-Ion Batteries via In Situ Dynamic Catalysis and Re-equilibration Effects

Contact Info

Product

Resources

About

High-Performance NiS₂ Hollow Nanosphere Cathodes in Magnesium-Ion Batteries Enabled by Tunable Redox Chemistry

Enabling Ultrafast Single Mg²⁺ Insertion Kinetics of Magnesium-Ion Batteries via In Situ Dynamic Catalysis and Re-equilibration Effects