Ni3Sn2/nitrogen-doped graphene composite with chemisorption and electrocatalysis as advanced separator modifying material for lithium sulfur batteries

Qi, Xinmei; Huang, Liwu; Luo, Yiteng; Chen, Qinghao; Chen, Yungui

doi:10.1016/j.jcis.2022.08.031

Cited by 14 publications

(16 citation statements)

References 70 publications

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“…The size of SnO 2– x shown in Figure g,h is about 7–12 nm. Besides, the appearance of the graphite phase indicates that the porous carbon is partially graphitized, which is conducive to the rapid diffusion of Li + and the rapid transfer of electrons, resulting in good rate properties. , Figure i shows the HAADF-STEM image of the SnO 2– x /PC material. The white particles are SnO 2– x , evenly distributed in PC.…”

Section: Results and Discussionmentioning

confidence: 99%

“…We have found that the modification of the separator for its functionalization plays an active role in improving the utilization rate of sulfur and the long cycle life of lithium sulfur batteries. , On the one hand, the functional separator can promote the uniform diffusion of lithium ions. On the other hand, it can inhibit the shuttle effect by adsorption and physical barrier .…”

Section: Introductionmentioning

confidence: 99%

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Superfine SnO_2–x Particles Embedded in a Porous Carbon Matrix as a Separator-Modifying Material for High-Performance Lithium Sulfur Batteries

Huang

Chen

2023

Ind. Eng. Chem. Res.

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The commercialization of lithium sulfur batteries faces great challenges, such as shuttle effect and low conductivity. Herein, we explore embedding anoxic oxide SnO 2−x in a porous carbon matrix as a separator-modifying material for lithium sulfur batteries. This material can limit the size of SnO 2−x particles and reduce their agglomeration through confining by the porous carbon (PC). As a result, more adsorption and catalytic sites can be obtained. Moreover, the oxygen vacancies in SnO 2−x can change the electronic environment to enhance the adsorption and catalysis of polysulfides, resulting in the depression of the shuttle effect of the battery. Therefore, the lithium sulfur battery with the SnO 2−x / PC-modified separator has excellent cycling performance. At a current rate of 1 C, it can provide a high initial discharge capacity of 1049.4 mAh g −1 and maintain a reversible specific capacity of 798.4 mAh g −1 after 300 cycles.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superfine SnO_2–x Particles Embedded in a Porous Carbon Matrix as a Separator-Modifying Material for High-Performance Lithium Sulfur Batteries

Huang

Chen

2023

Ind. Eng. Chem. Res.

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“…Ni 3 Sn 2 doping was used to decrease the pore size of NrGO by 32%, improving polysulfide rejection. 201…”

Section: Carbon-based Modificationsmentioning

confidence: 99%

“…Ni 3 Sn 2 doping was used to decrease the pore size of NrGO by 32%, improving polysulde rejection. 201 Because the ion-sieving mechanism is oen insufficient, graphene is usually modied via heteroatom doping, yielding nitrogen-doped graphene and sulfur-doped graphene. 202,203 By adding nitrogen defects to the graphene lattice, lone pairs from the graphitic, pyridinic, or pyrrolic nitrogen enable LiPS chemisorption.…”

Section: Graphenementioning

confidence: 99%

“…202,203 By adding nitrogen defects to the graphene lattice, lone pairs from the graphitic, pyridinic, or pyrrolic nitrogen enable LiPS chemisorption. Recently, Qi et al 201 used the adsorption ability of nitrogen-doped graphene (NG) to reduce the shuttle effect. The LSB with the PP/NG separator had 112% higher capacity retention than the battery with a pristine separator.…”

Section: Graphenementioning

confidence: 99%

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Recent advances in modified commercial separators for lithium–sulfur batteries

Kim

Adhikari³

et al. 2023

J. Mater. Chem. A

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Cobalt/MXene‐derived TiO₂ Heterostructure as a Functional Separator Coating to Trap Polysulfide and Accelerate Redox Kinetics for Reliable Lithium‐sulfur Battery

Chang,

Liu,

Feng

et al. 2024

Batteries & Supercaps

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Lithium‐sulfur (Li‐S) batteries are one of the most potential new energy storage systems due to their high theoretical capacity and high energy density. However, the application of Li‐S batteries is currently restricted due to the dissolution of polysulfides in the electrolyte, which leads to the shuttle effect of lithium polysulfides (LiPSs). Here, we present a Co@MXene‐derived TiO2 heterostructure decorated on carbon sheets derived from folic acid (Co@M‐TiO2/C) as a functional separator coating to trap polysulfide and accelerate redox kinetics in Li‐S batteries. The interconnected porous structure with good electrical conductivity of the heterostructure boasts rapid ion diffusion and efficient electron transfer within the battery. By attaching Co and MXene‐derived dual‐phased TiO2 to two‐dimensional carbon sheets, heterostructures are formed, ensuring complete exposure of the active sites. These heterostructures exhibit catalytic effects on LiPSs and excellent adsorption capabilities, effectively inhibiting the shuttle effect and accelerating the redox kinetics. Considering these advantages, the Li‐S battery with the optimized Co@M‐TiO2/C modified separator demonstrates a high specific capacity of 1481.7 mAh g‐1 at 0.2 C, superior rate performance of 855.5 mAh g‐1 at 2 C, and excellent cycling performance under a high sulfur load of 4.4 mg cm‐2.

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Ni3Sn2/nitrogen-doped graphene composite with chemisorption and electrocatalysis as advanced separator modifying material for lithium sulfur batteries

Cited by 14 publications

References 70 publications

Superfine SnO_2–x Particles Embedded in a Porous Carbon Matrix as a Separator-Modifying Material for High-Performance Lithium Sulfur Batteries

Superfine SnO_2–x Particles Embedded in a Porous Carbon Matrix as a Separator-Modifying Material for High-Performance Lithium Sulfur Batteries

Recent advances in modified commercial separators for lithium–sulfur batteries

Cobalt/MXene‐derived TiO₂ Heterostructure as a Functional Separator Coating to Trap Polysulfide and Accelerate Redox Kinetics for Reliable Lithium‐sulfur Battery

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Ni3Sn2/nitrogen-doped graphene composite with chemisorption and electrocatalysis as advanced separator modifying material for lithium sulfur batteries

Cited by 14 publications

References 70 publications

Superfine SnO2–x Particles Embedded in a Porous Carbon Matrix as a Separator-Modifying Material for High-Performance Lithium Sulfur Batteries

Superfine SnO2–x Particles Embedded in a Porous Carbon Matrix as a Separator-Modifying Material for High-Performance Lithium Sulfur Batteries

Recent advances in modified commercial separators for lithium–sulfur batteries

Cobalt/MXene‐derived TiO2 Heterostructure as a Functional Separator Coating to Trap Polysulfide and Accelerate Redox Kinetics for Reliable Lithium‐sulfur Battery

Contact Info

Product

Resources

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Superfine SnO_2–x Particles Embedded in a Porous Carbon Matrix as a Separator-Modifying Material for High-Performance Lithium Sulfur Batteries

Superfine SnO_2–x Particles Embedded in a Porous Carbon Matrix as a Separator-Modifying Material for High-Performance Lithium Sulfur Batteries

Cobalt/MXene‐derived TiO₂ Heterostructure as a Functional Separator Coating to Trap Polysulfide and Accelerate Redox Kinetics for Reliable Lithium‐sulfur Battery