Hollow cubic ZnS-SnS2 heterostructures as sulfur hosts to enhance chemisorption and catalytic conversion of polysulfides for lithium sulfur batteries

Liu, Huazhong; Chen, Zongmin; Hong, Shouyu; Zhang, Ze; Yang, Zhenyu; Cai, Jianxin

doi:10.1016/j.jelechem.2023.117252

Cited by 14 publications

(5 citation statements)

References 56 publications

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“…This interface serves as an active site for improved interfacial charge transfer and surface adsorption, which is essential for enhanced polysulfide redox kinetic activity. 22,41 The homogeneous distribution of C, N, S, Co, and Sn elements was verified by EDS elemental mapping. Clearly, the special structure of CoS 2 /SnS 2 @CNFs is suitable as a carrier material for the lithium−sulfur battery cathode.…”

Section: Resultsmentioning

confidence: 93%

“…In addition, the interface between the different crystalline planes of CoS 2 and SnS 2 is clearly visible (called the heterogeneous interface ,− ), which confirms the heterogeneous structure of CoS 2 /SnS 2 . This interface serves as an active site for improved interfacial charge transfer and surface adsorption, which is essential for enhanced polysulfide redox kinetic activity. , The homogeneous distribution of C, N, S, Co, and Sn elements was verified by EDS elemental mapping. Clearly, the special structure of CoS 2 /SnS 2 @CNFs is suitable as a carrier material for the lithium–sulfur battery cathode.…”

Section: Resultsmentioning

confidence: 94%

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N-Doped Carbon Fiber-Encapsulated CoS₂/SnS₂ Heterostructures Facilitate Polysulfide Conversion for Lithium–Sulfur Batteries

Jin,

Liu,

Hong

et al. 2024

J. Phys. Chem. C

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Heterojunction structures as an advanced strategy may promote the synergistic effect of different component materials; the rational design of heterojunctions allows them to exhibit various advantages when applied to lithium–sulfur batteries. Hollow CoSn(OH)6 was used as a precursor, and polyacrylonitrile PAN and sulfur powder were used as raw materials. N-doped carbon nanofiber-encapsulated CoS2/SnS2 heterostructured materials CoS2/SnS2@CNFs were prepared by an electrostatic spinning technique and in situ vulcanization and applied to the lithium–sulfur battery cathode. A hollow cubic material with structural stability and a physical domain-limiting effect, that is, the CoS2/SnS2 heterostructure, was effectively constructed, and rapid charge transfer was realized by a built-in electric field induced to form by the heterogeneous interface. Meanwhile, the fiber-like network structure facilitates the wetting of the electrolyte and shortens the ion transfer path. The results show that a CoS2/SnS2@CNFs@S-based battery exhibits an excellent electrochemical performance. The initial discharge specific capacities were 1204.3 mAh g–1 at a current density of 0.1 C and 615.2 mAh g–1 at 4 C. The long-cycle performance showed that the cells only exhibited an ultralow decay rate of 0.067% per week on average after 1000 cycles at 2C. When the sulfur loading was increased to 5.3 mg cm–2 and the electrolyte/sulfur ratio was 6 μL mg–1, excellent cycling stability was still demonstrated after 250 weeks of cycling at 0.2C.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 94%

N-Doped Carbon Fiber-Encapsulated CoS₂/SnS₂ Heterostructures Facilitate Polysulfide Conversion for Lithium–Sulfur Batteries

Jin,

Liu,

Hong

et al. 2024

J. Phys. Chem. C

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“…The Li 2 S 6 solution. 54 It is found that the peak intensity only slightly decreases for PMo 12 and Co−NCe, while the peak intensity drops significantly for PMo 12 /Co−NCe, further confirming the strong interaction between LiPSs and PMo 12 /Co−NCe, which may benefit from its lowest CA discussed above. The electrochemical performances of the LSBs were tested by assembling Coin 2025 cells with an average sulfur load of 1.2 mg cm −2 .…”

Section: Resultsmentioning

confidence: 99%

“…This observation indicates that PMo 12 /Co–NCe exhibits the highest adsorption capacity for lithium polysulfides. And the validity of this result can be confirmed through the UV–vis spectrum analysis, where the absorption peak observed at about 260 nm corresponds to the Li 2 S 6 solution . It is found that the peak intensity only slightly decreases for PMo 12 and Co–NCe, while the peak intensity drops significantly for PMo 12 /Co–NCe, further confirming the strong interaction between LiPSs and PMo 12 /Co–NCe, which may benefit from its lowest CA discussed above.…”

Section: Resultsmentioning

confidence: 99%

“…According to the results denoted in Figure d, all the cells with modified separators exhibit the effectively enhanced diffusivity of Li + compared to that of the pristine PP separator. More importantly, the PMo 12 /Co–NCe-modified cell displays the largest Li + diffusion coefficients, suggesting that the PMo 12 /Co–NCe-modified cell has a lower barrier for lithium-ion diffusion and accelerates the rate of lithium polysulfide conversion . Moreover, EIS was measured to reveal the fast redox kinetics of LSBs with modified separators further.…”

Section: Resultsmentioning

confidence: 99%

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Keggin-Type Polyoxometalate and Co Nanoparticles Codecorated Separator for High-Performance Lithium–Sulfur Battery

Sun,

Wu,

Xia

et al. 2024

Crystal Growth & Design

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The Li−S battery has garnered widespread attention as an intriguing new energy storage equipment due to its remarkable energy density and low cost. Nevertheless, the infamous shuttle effect seriously hinders the commercialization process. In order to address this issue, this study rationally synthesizes the composites comprising Keggin-type polyoxometalate and Co nanoparticles, which are then coated on a pristine polypropylene separator. The modified separator can greatly inhibit lithium polysulfide shuttling, thereby leading to a greatly improved electrochemical performance. At the first cycle, the fabricated Li−S battery exhibits a specific discharge capacity of 1335.7 mA h g −1 , surpassing the 938.7 mA h g −1 capacity of an unmodified separator. At a current density of 1C, the initial reversible discharge capacity reaches 988.2 mA h g −1 , and even after 500 cycles, it still retains a remaining capacity of 664.2 mA h g −1 , with a capacity decay rate of 0.066% per cycle. Even at a high sulfur loading of 4.2 mg cm −2 , the device displays a remarkable initial discharge capacity of 1158.2 mA h g −1 , with a remaining capacity of 952.7 mA h g −1 after 70 cycles (0.1C). This significant performance enhancement could be ascribed to the synergistic effect of PMo 12 /Co−NCe, which exhibits greatly decreased electron transfer resistance and contact angle to the electrolyte, facilitating the rapid transport of Liion and kinetics. Meanwhile, the severe shuttle effect is alleviated effectively by combining the strong catalytic activity of PMo 12 and Co nanoparticles with long-chain polysulfides.

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TiO1.75/Cu(2,4-PDCA)2 heterostructure with simultaneous adsorption-directed transfer-bidirectional catalysis for effectively controlling shuttling in lithium-sulfur batteries

Zhang,

Ge,

Lang

et al. 2024

Journal of Energy Storage

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Hollow cubic ZnS-SnS2 heterostructures as sulfur hosts to enhance chemisorption and catalytic conversion of polysulfides for lithium sulfur batteries

Cited by 14 publications

References 56 publications

N-Doped Carbon Fiber-Encapsulated CoS₂/SnS₂ Heterostructures Facilitate Polysulfide Conversion for Lithium–Sulfur Batteries

N-Doped Carbon Fiber-Encapsulated CoS₂/SnS₂ Heterostructures Facilitate Polysulfide Conversion for Lithium–Sulfur Batteries

Keggin-Type Polyoxometalate and Co Nanoparticles Codecorated Separator for High-Performance Lithium–Sulfur Battery

TiO1.75/Cu(2,4-PDCA)2 heterostructure with simultaneous adsorption-directed transfer-bidirectional catalysis for effectively controlling shuttling in lithium-sulfur batteries

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Hollow cubic ZnS-SnS2 heterostructures as sulfur hosts to enhance chemisorption and catalytic conversion of polysulfides for lithium sulfur batteries

Cited by 14 publications

References 56 publications

N-Doped Carbon Fiber-Encapsulated CoS2/SnS2 Heterostructures Facilitate Polysulfide Conversion for Lithium–Sulfur Batteries

N-Doped Carbon Fiber-Encapsulated CoS2/SnS2 Heterostructures Facilitate Polysulfide Conversion for Lithium–Sulfur Batteries

Keggin-Type Polyoxometalate and Co Nanoparticles Codecorated Separator for High-Performance Lithium–Sulfur Battery

TiO1.75/Cu(2,4-PDCA)2 heterostructure with simultaneous adsorption-directed transfer-bidirectional catalysis for effectively controlling shuttling in lithium-sulfur batteries

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N-Doped Carbon Fiber-Encapsulated CoS₂/SnS₂ Heterostructures Facilitate Polysulfide Conversion for Lithium–Sulfur Batteries

N-Doped Carbon Fiber-Encapsulated CoS₂/SnS₂ Heterostructures Facilitate Polysulfide Conversion for Lithium–Sulfur Batteries