Construction of composite separator with 3D hierarchical spinel structure in Lithium-Sulfur batteries

Mao, Yangyang; Chen, Dong; Chen, Yuchao; Xiao, Yupeng; Li, Tianle; Hao, Xiaoqian; You, Jiyuan; Wang, Wenju; Li, Yuqian; Meng, Shaoliang; Wu, Jun; Zhao, Jiucheng

doi:10.1016/j.cej.2022.137766

Cited by 20 publications

(9 citation statements)

References 55 publications

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“…Additionally, the inset in Figure 5h shows a digital graph of powering a light-emitting diode (LED) by the VC-1/PP-enabled pouch cell. Thanks to the synchronously protective effect of the VC-1/PP separator on the sulfur cathode and lithium anode, both the high-sulfur-load cathode and pouch-cell demonstrate overwhelming electrochemical performance compared with those of the recent literature (Figure 5i and Table S2, Supporting Information, Figure 5j and Table S3, Supporting Information), [32][33][34][35][36][37][38][39][40][41][42] revealing the feasible scale control of VC spheres toward commercially viable Li-S batteries.…”

Section: Resultsmentioning

confidence: 85%

Dual‐Functional V₂C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

et al. 2023

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Lithium–sulfur (Li–S) batteries are considered as one of the most promising candidates to achieve an energy density of 500 Wh kg⁻1. However, the challenges of shuttle effect, sluggish sulfur conversion kinetics, and lithium‐dendrite growth severely obstruct their practical implementation. Herein, multiscale V2C MXene (VC) with a spherical confinement structure is designed as a high‐efficiency bifunctional promotor for the evolution of sulfur and lithium species in Li–S batteries. Combining synchrotron X‐ray 3D nano‐computed tomography (X‐ray 3D nano‐CT), small‐angle neutron scattering (SANS), and first‐principle calculations, it is revealed that the activity of VC can be maximized by tuning the scale, and the as‐attained functions are conducted as follows: (i) the VC acts as the efficient lithium polysulfide (LiPS) scavenger due to the large number of active sites; (ii) the VC exhibits significantly improved electrocatalytic function for the Li2S nucleation and decomposition reaction kinetics owing to the scale effect; and (iii) the VC can regulate the dynamic behavior of Li‐ions and thus stabilize the lithium plating/stripping effectively on account of the unique ion‐sieving effect.

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Section: Resultsmentioning

confidence: 85%

Dual‐Functional V₂C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

et al. 2023

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“…All DFT calculations above were performed using ORCA 5.02 program. [59,60] The adsorption energy of S 8 and LiPS species on the substrate was evaluated using the formula [61] E ads = E total − ( E substrate + E species )…”

Section: Methodsmentioning

confidence: 99%

Metal Nanoclusters as a Superior Polysulfides Immobilizer toward Highly Stable Lithium–Sulfur Batteries

Sun,

Fu,

Sekine

et al. 2023

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Due to their high designability, unique geometric and electronic structures, and surface coordination chemistry, atomically precise metal nanoclusters are an emerging class of functional nanomaterials at the forefront of materials research. However, the current research on metal nanoclusters is mainly fundamental, and their practical applications are still uncharted. The surface binding properties and redox activity of Au24Pt(PET)18 (PET: phenylethanethiolate, SCH2CH2Ph) nanoclusters are herein harnessed as an high‐efficiency electrocatalyst for the anchoring and rapid conversion of lithium polysulfides in lithium–sulfur batteries (LSBs). Au24Pt(PET)18@G composites are prepared by using the large specific surface area, high porosity, and conductive network of graphene (G) for the construction of battery separator that can inhibit polysulfide shuttle and accelerate electrochemical kinetics. Resultantly, the LSB using a Au24Pt(PET)18@G‐based separator presents a high reversible specific capacity of 1535.4 mA h g−1 for the first cycle at 0.2 A g−1 and a rate capability of 887 mA h g−1 at 5 A g−1. After 1000 cycles at 5 A g−1, the capacity is 558.5 mA h g−1. This study is a significant step toward the application of metal nanoclusters as optimal electrocatalysts for LSBs and other sustainable energy storage systems.

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“…To address the above challenges, new nanostructured carbon materials have been widely used as separator modifiers and this has led to the improved rate and cycle performance of batteries. , However, the cycle performance is still unsatisfactory due to the insufficient amount of polar sites needed for polysulfide adsorption . Recently, a large amount of efforts have been made to synthesize new separator modifying materials, such as heteroatom-doped carbon materials, , metal carbides, metal oxides, spinels, and perovskites, which can interact strongly with polysulfides. Transition-metal phosphides, such as Ni 2 P, FeP, Cu 3 P, and NiCoP, have attracted academic attention due to their good electrochemical stability, low charge–discharge polarization voltage, and strong polarity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of the Ni₂P–Co Mott–Schottky Junction as an Electrocatalyst to Boost Sulfur Conversion Kinetics and Application in Separator Modification in Li-S Batteries

Zhang

Qiao

et al. 2023

ACS Appl. Mater. Interfaces

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To overcome the shuttling effect and sluggish conversion kinetics of polysulfides, a large number of catalysts have been designed for lithium−sulfur (Li−S) batteries. Herein, a Mott−Schottky junction catalyst composed of Co nanoparticles and Ni 2 P was designed to improve polysulfide kinetics. Our investigations reveal the rearrangement of charges at the Schottky junction interface and the construction of the built-in electric field are crucial for lowering the activation energy of the dissolved Li 2 S n reduction and Li 2 S nucleation reaction. Furthermore, a series of experimental and electrochemical tests were performed to demonstrate that the Schottky catalytic effect enhanced the synergistic catalytic effect. With a Ni 2 P−Co@CNT catalyst, the battery exhibits an initial specific capacity of 874 mAh g −1 at a rate of 4.0 C, and the decay rate per cycle is 0.049% in 700 cycles. Meanwhile, the battery shows 0.118% decay rate per cycle at 0.5 C in 100 cycles at a high sulfur loading of 10 mg cm −2 . The Schottky heterojunction structure proposed here has been shown to have a good catalytic effect on the reduction of Li 2 S n and nucleation of Li 2 S, which provides a profound guidance for efficient and rational catalyst design.

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Construction of composite separator with 3D hierarchical spinel structure in Lithium-Sulfur batteries

Cited by 20 publications

References 55 publications

Dual‐Functional V₂C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

Dual‐Functional V₂C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

Metal Nanoclusters as a Superior Polysulfides Immobilizer toward Highly Stable Lithium–Sulfur Batteries

Synthesis of the Ni₂P–Co Mott–Schottky Junction as an Electrocatalyst to Boost Sulfur Conversion Kinetics and Application in Separator Modification in Li-S Batteries

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Construction of composite separator with 3D hierarchical spinel structure in Lithium-Sulfur batteries

Cited by 20 publications

References 55 publications

Dual‐Functional V2C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

Dual‐Functional V2C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

Metal Nanoclusters as a Superior Polysulfides Immobilizer toward Highly Stable Lithium–Sulfur Batteries

Synthesis of the Ni2P–Co Mott–Schottky Junction as an Electrocatalyst to Boost Sulfur Conversion Kinetics and Application in Separator Modification in Li-S Batteries

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Dual‐Functional V₂C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

Dual‐Functional V₂C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

Synthesis of the Ni₂P–Co Mott–Schottky Junction as an Electrocatalyst to Boost Sulfur Conversion Kinetics and Application in Separator Modification in Li-S Batteries