In-situ evolution of CoS/C hollow nanocubes from metal-organic frameworks for sodium-ion hybrid capacitors

Yu, Yang; Ma, Yang; Wang, Xuejie; Gao, Zicheng; Yu, Jiaguo; Liu, Tao

doi:10.1016/j.cej.2022.140610

Cited by 44 publications

(18 citation statements)

References 46 publications

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“…After the adsorption of Li 2 S 6 , all peaks of Co 2p 3/2 are shifted to higher binding energy after adsorption over Li 2 S 6 (Figure S14), which can prove that the electrons are transferred from Co 3 Se 4 to Li 2 S 6 . Moreover, the decrease in the relative ratio of Co 2+ and the increase in the relative ratio of Co 3+ indicate that Co 2+ is partially oxidized after electron transfer. − …”

Section: Resultsmentioning

confidence: 99%

Synergistic Effects of Co₃Se₄ and Ti₂C₃T_x for Performance Enhancement on Lithium–Sulfur Batteries

Wang

Zhu

et al. 2023

ACS Appl. Mater. Interfaces

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As electronic equipment develops rapidly, higher requirements are placed on electrochemical energy-storage devices. These requirements can be met by a lithium− sulfur (Li−S) battery since it has an impressive energy density of 2600 Wh kg −1 and a high theoretical specific capacity of 1675 mAh g −1 . Pitifully, the sluggish redox reaction kinetics and the shuttle effect of polysulfide seriously limit its applications. Separator modification has been proven to be an effective strategy for improving the performance of Li−S batteries. Herein, we have designed a competent three-dimensional separator. It is obtained by embedding Co 3 Se 4 nanoparticles on nitrogen-doped porous carbon (Co 3 Se 4 @N−C) by high-temperature selenization of ZIF-67, which are compounded with Ti 3 C 2 T x by electrostatic dispersion self-assembly, and the compound is used to adjust the surface properties of a polypropylene (PP) separator. Due to the synergistic effect of the superior catalytic performance of Co 3 Se 4 @N−C and the enhancement of adsorption and conductivity bestowed by Ti 3 C 2 T x , lithium−sulfur batteries perform excellently with the modified PP separator. Specifically, the battery with a Co 3 Se 4 @N−C/Ti 3 C 2 T x -modified PP separator exhibits an outstanding rate performance of 787 mAh g −1 at 4C, and stable performance is maintained after 300 cycles at 2C. The density functional theory (DFT) calculations are also performed to confirm the synergistic effect of Co 3 Se 4 @N−C and Ti 3 C 2 T x . This design integrates the merits of catalysis and adsorption and provides a new method for constructing high-performance lithium−sulfur batteries. KEYWORDS: lithium−sulfur battery, Co 3 Se 4 , Ti 3 C 2 T x , separators, adsorption, catalysts

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Section: Resultsmentioning

confidence: 99%

Synergistic Effects of Co₃Se₄ and Ti₂C₃T_x for Performance Enhancement on Lithium–Sulfur Batteries

Wang

Zhu

et al. 2023

ACS Appl. Mater. Interfaces

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“…Electrochemical energy storage technologies have attracted wide attention to utilizing sustainable energy. − Especially, lithium-ion batteries (LIBs) have become the dominating energy storage system with widespread applications. − However, the unevenly distributed and limited lithium resources in the earth’s crust inevitably lead to high costs. In this regard, sodium-ion batteries (SIBs), with the cost-effectiveness of abundant sodium resources, as well as the electrochemical similarity with LIBs, have shown their great potential in terms of large-scale energy storage. − However, SIBs display low specific capacity and sluggish reaction dynamics arising from the higher redox potentials of Na + /Na (−2.7 V) compared with Li + /Li (−3.0 V) and larger atomic radius of Na + (1.02 Å) to Li + (0.76 Å). − Unlike LIBs that can directly use graphite as the anode, suitable anodes for SIBs are still under exploration. Therefore, research into anode materials with outstanding capacity and prolonged lifespan is crucial.…”

Section: Introductionmentioning

confidence: 99%

Bimetal Oxide Reduction-Induced Perforation Strategy for Preparing a Multi-Microchannel Graphene-Based Anode Material with Rapid Sodium-Ion Diffusion

Liu,

Yang,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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A sodium-ion battery, with a wide operating range, is much cheaper and safer than a lithium battery. Graphene is regarded as a promising carbon material in the preparation of anode materials. However, the large two-dimensional (2D) graphene sheets restrain the cross-plane diffusion of electrolyte ions, limiting the further improvement of rate performance. Herein, a nanohybrid of FeCo 2 Se 4 and holey graphene (FeCo 2 Se 4 /HG) has been successfully prepared by the synchronism of pore creation and active material growth. Specifically, FeCo-oxide nanoparticles serve as the etching agents, generating in-plane nanoholes and subsequently converted into FeCo 2 Se 4 . The nanoholes provide a high density of cross-plane diffusion channels for sodium ions, serving as ionic diffusion shortcuts between different graphene layers to accelerate ion transport across the entire electrode. The unique architecture endows FeCo 2 Se 4 /HG with superior rate capability (411.2 mA h g −1 at 20 A g −1 ) and a specific capacity of 432.4 mA h g −1 at 2.0 A g −1 after 2000 cycles with a capacity retention rate of 92.4%. Therefore, pore engineering makes it possible for holey graphene-based electrodes to achieve outstanding rate performance and superb cycling durability.

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“…The rapid development of the economy, shortage of nonrenewable energy, and climate change have reminded us to develop energy sources. − Supercapacitors are widely used as energy storage devices because of their high specific energy, stable cycling performance, rapid charge–discharge rates, and convenience. − In supercapacitors, the type of electrode material used is very important. , Many types of carbonaceous materials can be used in supercapacitors, such as carbon nanotubes (CNTs), reduced graphene oxide (RGO), , carbon aerogels (CAs), , and so forth. Among these materials, nano-CAs exhibit excellent application performance in double-layer supercapacitors because of their three-dimensional (3D) structure, large specific surface area, and presence of abundant pores. , However, the applications of traditional CAs are limited by disadvantages such as a long preparation process, low specific capacity, and so forth. , To overcome these disadvantages, researchers have attempted to dope high-specific capacity nanocompounds into CAs. − …”

Section: Introductionmentioning

confidence: 99%

Synthetic Strategy for MnO₂ Nanoparticle/Carbon Aerogel Heterostructures for Improved Supercapacitor Performance

Liu

Zhang

et al. 2023

ACS Appl. Nano Mater.

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Constructing heterostructure in nanomaterials is a scientific and efficient method to optimize the electrochemical properties of supercapacitors. Carbon aerogels (CAs) can enhance electrical conductivity and ion diffusion because of their threedimensional porous structure, which is useful for fabricating electrodes. The moderate nanoheterostructures in aerogel nanomaterials have made great contributions to the optimization of application performance. Herein, a simple method for constructing the MnO 2 nanoparticle/CA (MnO 2 /CA) heterostructure is proposed. The MnO 2 /CA heterostructure exhibits outstanding electrochemical capability in a three-electrode system, with a specific capacitance of 384 F/g, higher than 201 F/g of the CA, at a current density of 0.5 A/g. When MnO 2 /CA is used as a symmetric supercapacitor, it also exhibits a high energy density and power density, with the highest energy density of 33.78 Wh/kg. The prepared MnO 2 /CA shows improved performance for synergies in providing a high specific capacity and long cycle life.

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In-situ evolution of CoS/C hollow nanocubes from metal-organic frameworks for sodium-ion hybrid capacitors

Cited by 44 publications

References 46 publications

Synergistic Effects of Co₃Se₄ and Ti₂C₃T_x for Performance Enhancement on Lithium–Sulfur Batteries

Synergistic Effects of Co₃Se₄ and Ti₂C₃T_x for Performance Enhancement on Lithium–Sulfur Batteries

Bimetal Oxide Reduction-Induced Perforation Strategy for Preparing a Multi-Microchannel Graphene-Based Anode Material with Rapid Sodium-Ion Diffusion

Synthetic Strategy for MnO₂ Nanoparticle/Carbon Aerogel Heterostructures for Improved Supercapacitor Performance

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In-situ evolution of CoS/C hollow nanocubes from metal-organic frameworks for sodium-ion hybrid capacitors

Cited by 44 publications

References 46 publications

Synergistic Effects of Co3Se4 and Ti2C3Tx for Performance Enhancement on Lithium–Sulfur Batteries

Synergistic Effects of Co3Se4 and Ti2C3Tx for Performance Enhancement on Lithium–Sulfur Batteries

Bimetal Oxide Reduction-Induced Perforation Strategy for Preparing a Multi-Microchannel Graphene-Based Anode Material with Rapid Sodium-Ion Diffusion

Synthetic Strategy for MnO2 Nanoparticle/Carbon Aerogel Heterostructures for Improved Supercapacitor Performance

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Synergistic Effects of Co₃Se₄ and Ti₂C₃T_x for Performance Enhancement on Lithium–Sulfur Batteries

Synergistic Effects of Co₃Se₄ and Ti₂C₃T_x for Performance Enhancement on Lithium–Sulfur Batteries

Synthetic Strategy for MnO₂ Nanoparticle/Carbon Aerogel Heterostructures for Improved Supercapacitor Performance