A MoO<sub>3</sub>/MoO<sub>2</sub>-CP self-supporting heterostructure for modification of lithium–sulfur batteries

Yang, Weiwei; Wei, Yi; Chen, Qian; Qin, Shengjian; Zuo, Jian‐Min; Tan, Shengdong; Zhai, Pengbo; Cui, Shiqiang; Wang, Haowu; Jin, Chunqiao; Xiao, Jing; Liu, Wei; Shang, Jia‐Xiang; Gong, Yongji

doi:10.1039/d0ta01664k

Cited by 50 publications

(37 citation statements)

References 48 publications

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“…It is reported that combining another compound with MoS 2 to form heterostructures is an efficient way to restrict the shuttle of polysulfides. , Mo-based oxides (MoO x ) are good polysulfides hosts owing to the strong polarity of the metal–oxygen bond . Therefore, MoS 2 –MoO x heterostructures can improve the adsorption ability effectively.…”

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confidence: 99%

Facile Synthesis of Heterostructured MoS₂–MoO₃ Nanosheets with Active Electrocatalytic Sites for High-Performance Lithium–Sulfur Batteries

et al. 2021

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In order to overcome the shuttling effect of soluble polysulfides in lithium–sulfur (Li–S) batteries, we have designed and synthesized a creative MoS2–MoO3/carbon shell (MoS2–MoO3/CS) composite by a H2O2-enabled oxidizing process under mild conditions, which is further used for separator modification. The MoS2–MoO3 heterostructures can conform to the CS morphology, forming two-dimensional nanosheets, and thus shorten the transport path of lithium ion and electrons. Based on our theoretical calculations and experiments, the heterostructures show strong surface affinity toward polysulfides and good catalytic activity to accelerate polysulfide conversion. Benefiting from the above merits, the Li–S battery with a MoS2–MoO3/CS modified separator exhibits good electrochemical performance: it delivers a high discharge capacity of 1531 mAh g–1 at 0.2 C; the initial capacity can be maintained by 92% after 600 cycles at 1 C, and the discharge capacity decay rate is only 0.0135% per cycle. Moreover, the MoS2–MoO3/CS battery still achieves good cycling stability with 78% capacity retention after 100 cycles at 0.2 C with a high sulfur loading of 5.9 mg cm–2. This work offers a facile design to construct the MoS2–MoO3 heterostructures for high-performance Li–S batteries, and may also improve one’s understanding on the heterostructure contribution during polysulfide adsorption and conversion.

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confidence: 99%

Facile Synthesis of Heterostructured MoS₂–MoO₃ Nanosheets with Active Electrocatalytic Sites for High-Performance Lithium–Sulfur Batteries

et al. 2021

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“…And as can be observed in follow s‐MoO 3 /MoO 2 @C XRD pattern of Figure 1(f), orthorhombic MoO 3 (PDF#05‐0508), monoclinic MoO 2 (PDF#32‐0671) and some characteristic peaks of transition state molybdenum oxides appear simultaneously, which is considered as MoO 3 and MoO 2 composite materials. The weak diffraction peak indicates that the crystallinity decreases after heat treatment, [19] corresponding to the low crystallinity region in HRTEM.…”

Section: Resultsmentioning

confidence: 99%

s‐MoO₃/MoO₂@C Hollow Tubes as Polysulfide‐Filter for Lithium‐Sulfur Batteries

et al. 2021

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Increasing the active sites to adsorb polysulfides and catalyze its conversion to Li2S/Li2S2 is considered an effective approach to accelerate redox kinetics lithium‐sulfur (Li−S) battery. In this paper, shortened s‐MoO3/MoO2@C hollow tube with abundant adsorption/catalytic active sites is prepared by self‐etching/thermal reduction. Due to the abundant active sites and good Li+ transport of the composite, the redox kinetics of polysulfides is enhanced. Under the condition of 1.56 mg cm−2 of sulfur loading and E/S=12 μL mg−1, the activation energy for Li2S/Li2S2 formation in Li−S cell is reduced to 14.08 kJ mol−1, and the discharging specific capacity remains 488.4 mAh g−1 at 5 C.

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“…As a consequence, the MoO 3 /MoO 2 heterostructure delivers an initial specic capacity of 580.5 mA h g À1 at 2.5C with a capacity retention of 82.8% aer 850 cycles. 66 Xu and co-workers combined NiO and NiCo 2 O 4 to produce NiO-NiCo 2 O 4 heterostructure as a sulfur host for Li-S batteries. They found that NiO-NiCo 2 O 4 heterostructure could signicantly promote polysulde conversion reactions and improve the electrical conductivity during cycling.…”

Section: Heterostructuresmentioning

confidence: 99%

Modulating the electronic structure of nanomaterials to enhance polysulfides confinement for advanced lithium–sulfur batteries

et al. 2021

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A MoO₃/MoO₂-CP self-supporting heterostructure for modification of lithium–sulfur batteries

Abstract: A unique MoO3/MoO2 heterostructure with an active interface is an ideal host for Li2S8, exhibiting superior rate and long-term cycling performance.

Cited by 50 publications

References 48 publications

Facile Synthesis of Heterostructured MoS₂–MoO₃ Nanosheets with Active Electrocatalytic Sites for High-Performance Lithium–Sulfur Batteries

Facile Synthesis of Heterostructured MoS₂–MoO₃ Nanosheets with Active Electrocatalytic Sites for High-Performance Lithium–Sulfur Batteries

s‐MoO₃/MoO₂@C Hollow Tubes as Polysulfide‐Filter for Lithium‐Sulfur Batteries

Modulating the electronic structure of nanomaterials to enhance polysulfides confinement for advanced lithium–sulfur batteries

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A MoO3/MoO2-CP self-supporting heterostructure for modification of lithium–sulfur batteries

Abstract: A unique MoO3/MoO2 heterostructure with an active interface is an ideal host for Li2S8, exhibiting superior rate and long-term cycling performance.

Cited by 50 publications

References 48 publications

Facile Synthesis of Heterostructured MoS2–MoO3 Nanosheets with Active Electrocatalytic Sites for High-Performance Lithium–Sulfur Batteries

Facile Synthesis of Heterostructured MoS2–MoO3 Nanosheets with Active Electrocatalytic Sites for High-Performance Lithium–Sulfur Batteries

s‐MoO3/MoO2@C Hollow Tubes as Polysulfide‐Filter for Lithium‐Sulfur Batteries

Modulating the electronic structure of nanomaterials to enhance polysulfides confinement for advanced lithium–sulfur batteries

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Product

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A MoO₃/MoO₂-CP self-supporting heterostructure for modification of lithium–sulfur batteries

Facile Synthesis of Heterostructured MoS₂–MoO₃ Nanosheets with Active Electrocatalytic Sites for High-Performance Lithium–Sulfur Batteries

Facile Synthesis of Heterostructured MoS₂–MoO₃ Nanosheets with Active Electrocatalytic Sites for High-Performance Lithium–Sulfur Batteries

s‐MoO₃/MoO₂@C Hollow Tubes as Polysulfide‐Filter for Lithium‐Sulfur Batteries