Yolk-shell MnO<sub>2</sub> coated sulfur particles with excellent cycle stability for Li-S batteries

Liu, Shoufa; Wang, Yinwei; Zhang, Ning; Qiao, Xuguang; Zhaofeng, Zhou

doi:10.1088/2053-1591/ab48aa

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…The reduction peaks represent the transformation of the S 8 molecule into long‐chain polysulfide Li 2 S x (4 ≤ x ≤ 8), and the long‐chain polysulfide into short‐chain polysulfide Li 2 S 2 /Li 2 S in turn; the oxidation peak reflects the transformation of short‐chain polysulfide to S 8 . [ 56 ] A comparison that shows the CV curves for the first turn of the three electrodes is illustrated in Figure 9 a. It can be seen that the reduction peak of the S@Co 3 O 4 /TiO 2 cathode is shifted to a high potential and the oxygenation peak is to a lower potential and has a higher peak, indicating that the cathode has high catalytic activity.…”

Section: Resultsmentioning

confidence: 99%

The Metal–Organic Frameworks Derived Co₃O₄/TiO₂ Heterojunction as a High‐Efficiency Sulfur Carrier for Lithium–Sulfur Batteries

Wei

Qiao

et al. 2023

Energy Tech

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Lithium–sulfur batteries, due to their various advantages such as their unique theoretical capacity, inexpensive, and environmental friendliness, have become one of the new‐generation energy storage systems. However, during the commercial development of lithium–sulfur batteries, they are limited by obstacles such as the volume expansion, shuttle effect, and low conductivity of S, which eventually lead to slow system reaction kinetics and poor cycling stability. Herein, heterostructured metal–organic framework‐derived Co3O4/TiO2 hybrids have been designed. The hollow structure of the Co3O4 is coupled with TiO2 on the surface to form a heterojunction to construct an internal electric field, which can promote charge transfer and improve reaction kinetics. Meanwhile, Co3O4/TiO2 has excellent trapping ability for lithium polysulfide, reducing the shuttle effect and alleviating volume expansion. As the cathode material, the initial discharge capacity of S@Co3O4/TiO2 at 0.1C is 1152.7 mAh g−1. Meanwhile, it has an initial specific capacity of 657 mAh g−1 at 1C, a capacity retention rate of 63.7% after 500 charge/discharge cycles, and an effective cycling stability with a decay rate of 0.072% in each cycle. This indicates that the construction of heterojunctions between materials has some enhancement on the performance of Li–S batteries.

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Section: Resultsmentioning

confidence: 99%

The Metal–Organic Frameworks Derived Co₃O₄/TiO₂ Heterojunction as a High‐Efficiency Sulfur Carrier for Lithium–Sulfur Batteries

Wei

Qiao

et al. 2023

Energy Tech

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“…Moreover, the principle of suppressing LiPSs through designing of the materials' structure discussed in Section 3.1 is also instructive in the preparation of inorganic manganese oxide. For example, hollow MnO 2 spheres [237] and yolk-shell S@MnO 2 spheres [239] provide large spaces for sulfur and expose rich polarity sites. However, the nonconductivity of MnO 2 still needs to be solved, so the introduction of CSs, [240] rGO, [241] and conducting polymers [242] is an effective strategy.…”

Section: Inorganic Oxides and Hydroxidesmentioning

confidence: 99%

Customized Structure Design and Functional Mechanism Analysis of Carbon Spheres for Advanced Lithium–Sulfur Batteries

Kang

Tian

Yan

et al. 2022

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Design of Coatings for Sulfur‐Based Cathode Materials in Lithium‐Sulfur Batteries: A review

Cai,

Zheng,

et al. 2024

Chemistry An Asian Journal

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Lithium‐sulfur batteries (LSBs) are considered next‐generation energy storage and conversion solutions owing to their high theoretical specific capacity and the high abundance/low‐cost of sulfur‐based cathode materials. However, LSBs still encounter significant challenges, including the low conductivities of sulfur‐based materials, severe volumetric expansion of sulfur during the discharge process, and the persistent “shuttle effect” of polysulfides. In recent years, a tremendous amount of research has been conducted to address the above challenges by developing coating and compositing materials and corresponding fabrication strategies for sulfur‐based cathode materials. In this study, the surface coating, compositing materials, and fabrication methodologies of LSB cathodes are comprehensively reviewed in terms of advanced materials, structure/component characterization, functional mechanisms, and performance validation. Some technical challenges are analyzed in detail, and possible future research directions are proposed to overcome the challenges toward practical applications of lithium‐sulfur batteries.

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Yolk-shell MnO₂ coated sulfur particles with excellent cycle stability for Li-S batteries

Cited by 4 publications

References 31 publications

The Metal–Organic Frameworks Derived Co₃O₄/TiO₂ Heterojunction as a High‐Efficiency Sulfur Carrier for Lithium–Sulfur Batteries

The Metal–Organic Frameworks Derived Co₃O₄/TiO₂ Heterojunction as a High‐Efficiency Sulfur Carrier for Lithium–Sulfur Batteries

Customized Structure Design and Functional Mechanism Analysis of Carbon Spheres for Advanced Lithium–Sulfur Batteries

Design of Coatings for Sulfur‐Based Cathode Materials in Lithium‐Sulfur Batteries: A review

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Yolk-shell MnO2 coated sulfur particles with excellent cycle stability for Li-S batteries

Cited by 4 publications

References 31 publications

The Metal–Organic Frameworks Derived Co3O4/TiO2 Heterojunction as a High‐Efficiency Sulfur Carrier for Lithium–Sulfur Batteries

The Metal–Organic Frameworks Derived Co3O4/TiO2 Heterojunction as a High‐Efficiency Sulfur Carrier for Lithium–Sulfur Batteries

Customized Structure Design and Functional Mechanism Analysis of Carbon Spheres for Advanced Lithium–Sulfur Batteries

Design of Coatings for Sulfur‐Based Cathode Materials in Lithium‐Sulfur Batteries: A review

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Yolk-shell MnO₂ coated sulfur particles with excellent cycle stability for Li-S batteries

The Metal–Organic Frameworks Derived Co₃O₄/TiO₂ Heterojunction as a High‐Efficiency Sulfur Carrier for Lithium–Sulfur Batteries

The Metal–Organic Frameworks Derived Co₃O₄/TiO₂ Heterojunction as a High‐Efficiency Sulfur Carrier for Lithium–Sulfur Batteries