The synergistic adsorption-electrocatalysis research of Mn2P interlayer for durable large-capacity and high-energy-efficiency Li-S batteries

Yang, Hangqi; Geng, Mengzi; Tang, Weiping; Shang, Chaoqun

doi:10.1016/j.cej.2022.137925

Cited by 23 publications

(4 citation statements)

References 45 publications

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“…However, the limited active sites and steric volume are stretched after the accumu-lation of LiPS, especially in high S loading cases. [8] Moreover, the introduction of more inactive components will reduce the overall energy density of the LSBs, which is contrary to the original aim. [9] In this regard, using functional separator interlayers offers an effective way to solve the technical bottleneck of LiPS's shuttle effect.…”

Section: Introductionmentioning

confidence: 96%

“…However, non-polar porous carbon materials can only adsorb polar LiPS by weak van der Waals force, which leads to the easy peeling of LiPS from the surface of the carbon layer, reducing the utilization rate of sulfur and deteriorating the cycling performance of the battery. [16] With this in mind, a series of polar electrocatalysts such as transition metal phosphides, [8,17] mental sulfides [18] and mental nitrides [19] have been exploited to improve the conversion reaction kinetics, and simultaneously reduce LiPS dissolution in the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

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Mo and Ni Coordinated Bimetallic Oxide as Catalyst in Modified Separators for Low‐Capacity Decay Lithium Sulfur Batteries

Dou

Zhao

et al. 2023

ChemNanoMat

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Lithium-sulfur (LiÀ S) batteries are considered to be the most promising candidates for achieving low-cost, highenergy density systems. The serious shuttle effect of polysulfides (LiPS) and the sluggish redox kinetics have become major obstacles to the practical application of LiÀ S batteries. Herein, a hollow microsphere structure of transition bimetallic oxide nickel molybdate (NiMoO 4 ) was prepared by hydrothermal reaction and calcination method. It was used as a separator coating material to inhibit LiPS shuttle and promote efficient redox conversion of sulfur species. The hollow microsphere structure not only possesses a large internal space to physically confine LiPS but also exposes abundant active sites to enhance the redox kinetics of LiPS. The NiMoO 4 shows superior adsorption ability for LiPS and accelerated ion/electron transport rates compared to NiO, thus facilitating the anchoring-conversion-diffusion processes of polysulfides. Benefiting from this versatility, the LiÀ S batteries with NiMoO 4 -PP exhibit a high discharge specific capacity of 1354.5 mAh g À 1 at 0.1 C. In addition, the battery exhibits excellent cycling stability with a capacity decay rate of 0.027% for 500 cycles at 2 C. These results demonstrate the potential application of NiMoO 4 -based electrocatalysts in high-performance LiÀ S batteries.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Mo and Ni Coordinated Bimetallic Oxide as Catalyst in Modified Separators for Low‐Capacity Decay Lithium Sulfur Batteries

Dou

Zhao

et al. 2023

ChemNanoMat

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“…In comparison, the theoretical energy density of LSBs can reach as high as 2600 Wh/kg, and hopefully realize a high full-cell-level density of 600 Wh/kg due to the multielectron redox reaction of LSBs. , Moreover, the naturally abundant, cost-effective, and environmentally friendly properties of sulfur further drive great interest of LSBs for academics and industry . Unfortunately, the inherent issues of LSBs impede their practical application: 1) the high solubility of high-order lithium polysulfides leads to shuttle effect problem, causing sulfur loss and Li anode corrosion; 2) the poor ionic/electronic conductivity of sulfur and final discharged products (Li 2 S 2 /Li 2 S) leads to sluggish reaction kinetics; 3) the inhomogeneous Li deposition and uncontrollable growth of Li dendrites cause battery failure and safety issues. − Considerable efforts have been made to address the aforementioned challenges in order to boost the electrochemical performance of LSBs, including introducing high-conductivity porous carbon or polar materials as hosts for anchoring polysulfides, − fabricating 3-dimensional (3D) cathodes for enhancing electronic/ionic conductivity and developing modified Li anodes (e.g., constructing artificial protective layers and 3D host materials with a lithiophilic property). Although these methods have generated exciting results, they can hardly kill two birds (suppress shuttle effect and growth of dendritic Li) with one stone.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Lithium Phytate/Carbon Nanotube Double-Layer-Modified Separators for High-Performance Lithium–Sulfur Batteries

Hu,

Wang,

Yuan

et al. 2024

ACS Appl. Mater. Interfaces

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Li dendrite and the shuttle effect are the two primary hindrances to the commercial application of lithium−sulfur batteries (LSBs). Here, a multifunctional separator has been fabricated via successively coating carbon nanotubes (CNTs) and lithium phytate (LP) onto a commercial polypropylene (PP) separator to improve the performance of LSBs. The LP coating layer with abundant electronegative phosphate group as permselective ion sieve not only reduces the polysulfide shuttle but also facilitates uniform Li + flux through the PP separator. And the highly conductive CNTs on the second layer act as a second collector to accelerate the reversible conversion of sulfide species. The synergistic effect of LP and CNTs further increases the electrolyte wettability and reaction kinetics of cells with a modified separator and suppresses the shuttle effect and growth of Li dendrite. Consequently, the LSBs present much enhanced rate performance and cyclic performance. It is expected that this study may generate an executable tactic for interface engineering of separator to accelerate the industrial application process of LSBs.

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“…Moreover, Yang et al exhibited that Mn 2 P nanoparticles interact with the electrolyte in Li-S battery to facilitate rapid electron transport, thereby improving their electrochemical performance. [24] Density functional theory (DFT) calculation indicates that MnP x dramatically catalyzes polysulfide conversion. [25] Therefore, these studies inspired us to believe that manganese phosphides and their heterogeneous structures combining two distinct manganese phosphides could serve as excellent host candidates in Li-S batteries.…”

Section: Introductionmentioning

confidence: 99%

Li–S Chemistry of Manganese Phosphides Nanoparticles With Optimized Phase

et al. 2023

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The targeted synthesis of manganese phosphides with target phase remains a huge challenge because of their various stoichiometries and phase‐dependent physicochemical properties. In this study, phosphorus‐rich MnP, manganese‐rich Mn2P, and their heterostructure MnP–Mn2P nanoparticles evenly dispersed on porous carbon are accurately synthesized by a convenient one‐pot heat treatment of phosphate resin combined with Mn2+. Moreover, their electrochemical properties are systematically investigated as sulfur hosts in lithium–sulfur batteries. Density functional theory calculations demonstrate the superior adsorption, catalysis capabilities, and electrical conductivity of MnP–Mn2P/C, compared with MnP/C and Mn2P/C. The MnP–Mn2P/C@S exhibits an excellent capacity of 763.3 mAh g−1 at 5 C with a capacity decay rate of only 0.013% after 2000 cycles. A phase evolution product (MnS) of MnP–Mn2P/C@S is detected during the catalysis of MnP–Mn2P/C with polysulfides redox through in situ X‐ray diffraction and Raman spectroscopy. At a sulfur loading of up to 8 mg cm−2, the MnP–Mn2P/C@S achieves an area capacity of 6.4 mAh cm−2 at 0.2 C. A pouch cell with the MnP–Mn2P/C@S cathode exhibits an initial energy density of 360 Wh kg−1.

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The synergistic adsorption-electrocatalysis research of Mn2P interlayer for durable large-capacity and high-energy-efficiency Li-S batteries

Cited by 23 publications

References 45 publications

Mo and Ni Coordinated Bimetallic Oxide as Catalyst in Modified Separators for Low‐Capacity Decay Lithium Sulfur Batteries

Mo and Ni Coordinated Bimetallic Oxide as Catalyst in Modified Separators for Low‐Capacity Decay Lithium Sulfur Batteries

Multifunctional Lithium Phytate/Carbon Nanotube Double-Layer-Modified Separators for High-Performance Lithium–Sulfur Batteries

Li–S Chemistry of Manganese Phosphides Nanoparticles With Optimized Phase

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