Surface strain-enhanced MoS2 as a high-performance cathode catalyst for lithium–sulfur batteries

Zhang, Chao Yue; Zhang, Chaoqi; Pan, Jiang Long; Sun, Guo Wen; Shi, Zude; Li, Canhuang; Chang, X.C.; Sun, Geng Zhi; Zhou, Jin; Cabot, Andreu

doi:10.1016/j.esci.2022.07.001

Cited by 74 publications

(33 citation statements)

References 57 publications

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“…Besides, part of the soluble LiPS generated during the first plateau is lost during the discharge process, thus not contributing to the second plateau. Therefore, the experimental Q2/Q1 ratio is usually lower than 3 and provides a measure of the degree of completion of the reduction reaction and the inhibition of the LiPS diffusion, associated with the electrode catalytic activity [53, 56, 59] . Figure 5e presents the Q2/Q1 ratios at different current densities obtained from the exact same battery in the presence or absence of the external magnetic field.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the experimental Q2/Q1 ratio is usually lower than 3 and provides a measure of the degree of completion of the reduction reaction and the inhibition of the LiPS diffusion, associated with the electrode catalytic activity. [53,56,59] Figure 5e presents the Q2/Q1 ratios at different current densities obtained from the exact same battery in the presence or absence of the external magnetic field. Significantly higher Q2/Q1 rations were systematically obtained in the presence of the magnetic field at all the current rates tested.…”

Section: Methodsmentioning

confidence: 99%

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Spin Effect to Promote Reaction Kinetics and Overall Performance of Lithium‐Sulfur Batteries under External Magnetic Field

Zhang

Sun

et al. 2022

Angewandte Chemie

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Lithium-sulfur batteries (LSBs) are still limited by the shuttle of lithium polysulfides (LiPS) and the slow LiÀ S reaction. Herein, we demonstrate that when using cobalt sulfide as a catalytic additive, an external magnetic field generated by a permanent magnet can significantly improve the LiPS adsorption ability and the LiÀ S reaction kinetics. More specifically, the results show both experimentally and theoretically how an electron spin polarization of Co ions reduces electron repulsion and enhances the degree of orbital hybridization, thus resulting in LSBs with unprecedented performance and stability. Under an external magnetic field, LSBs with 0.0084 % per cycle decay rate at 2 C during 8150 cycles are produced. Overall, this work not only demonstrates an effective strategy to promote LiPS adsorption and electrochemical conversion in LSBs at no additional energy cost but also enriches the application of the spin effect in the electrocatalysis fields.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Spin Effect to Promote Reaction Kinetics and Overall Performance of Lithium‐Sulfur Batteries under External Magnetic Field

Zhang

Sun

et al. 2022

Angewandte Chemie

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“…In the forthcoming decade, the community should tackle several technological issues. First, the shortening of charging time of batteries [273][274][275] and supercapacitors should exceed the conventional anode materials of graphite. Besides, the supercapacitors [276] are typically applied in the uphill climbing stage in an electric vehicle, and the batteries [277] are dominant power sources for motion on flat ground.…”

Section: Pressure Sensors For Touch Sensementioning

confidence: 99%

Applications of MXenes in human-like sensors and actuators

et al. 2022

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Human beings perceive the world through the senses of sight, hearing, smell, taste, touch, space, and balance. The first five senses are prerequisites for people to live. The sensing organs upload information to the nervous systems, including the brain, for interpreting the surrounding environment. Then, the brain sends commands to muscles reflexively to react to stimuli, including light, gas, chemicals, sound, and pressure. MXene, as an emerging two-dimensional material, has been intensively adopted in the applications of various sensors and actuators. In this review, we update the sensors to mimic five primary senses and actuators for stimulating muscles, which employ MXene-based film, membrane, and composite with other functional materials. First, a brief introduction is delivered for the structure, properties, and synthesis methods of MXenes. Then, we feed the readers the recent reports on the MXene-derived image sensors as artificial retinas, gas sensors, chemical biosensors, acoustic devices, and tactile sensors for electronic skin. Besides, the actuators of MXene-based composite are introduced. Eventually, future opportunities are given to MXene research based on the requirements of artificial intelligence and humanoid robot, which may induce prospects in accompanying healthcare and biomedical engineering applications.

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“…What is more, sulfur as an active material has the advantages of high natural abundance, relatively low price, and environmental friendliness. However, the practical application progress of Li–S batteries is restricted by severely deteriorated cycle stability and unsatisfactory discharge capacity, especially at a high rate, which is derived from the notorious shuttle effect of LiPSs intermediates and sluggish redox kinetics of LiPSs. − To solve the above issues, lots of strategies including rational constructs of cathode hosts and Li anodes, appropriate additives for electrolytes, and applicable multifunctional interlayers have been applied in Li–S batteries. , …”

Section: Introductionmentioning

confidence: 99%

NiFeP Anchored on rGO as a Multifunctional Interlayer To Promote the Redox Kinetics for Li–S Batteries via Regulating d-Bands of Ni-Based Phosphides

Xia

Han

Chen

et al. 2023

ACS Sustainable Chem. Eng.

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Sluggish kinetics of polysulfide redox reaction give rise to poor electrochemical properties for lithium−sulfur (Li−S) batteries. Electrocatalysts are introduced to decrease activation energy and effectively accelerate the dynamics of polysulfide conversion. In this study, we propose a rational strategy of tuning the d-band of catalysts via delivering Fe into Ni 2 P in situ grown on rGO to construct NiFeP/rGO composites. Based on the first-principles density functional theory calculation, the metallic conduction of Ni 2 P could be improved by Fe incorporation, facilitating a charge transfer electrocatalytic interface for redox reaction of LiPSs. Moreover, the d-band center of NiFeP also elevates to the Fermi level after incorporation with Fe, which could weaken the S−S bonds of polysulfides due to its redistributed electron population and reduce the activation barrier. Therefore, NiFeP/rGO composites as the functional interlayer for Li−S batteries can not only promote the interaction between polysulfides and NiFeP but also accelerate the conversion of polysulfides. They exhibit a high initial discharge capacity of 1261 mAh g −1 at 0.2 C and an outstanding rate reversible capacity of 671 mAh g −1 even at a high rate of 2 C. The high-efficiency NiFeP/rGO electrocatalyst with a rational structure for Li−S batteries testifies to the availability of the d-band regulating strategy with the low-activation-energy barrier and promotes an in-depth understanding of LiPSs redox reaction at the molecular or atom level.

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Surface strain-enhanced MoS2 as a high-performance cathode catalyst for lithium–sulfur batteries

Cited by 74 publications

References 57 publications

Spin Effect to Promote Reaction Kinetics and Overall Performance of Lithium‐Sulfur Batteries under External Magnetic Field

Spin Effect to Promote Reaction Kinetics and Overall Performance of Lithium‐Sulfur Batteries under External Magnetic Field

Applications of MXenes in human-like sensors and actuators

NiFeP Anchored on rGO as a Multifunctional Interlayer To Promote the Redox Kinetics for Li–S Batteries via Regulating d-Bands of Ni-Based Phosphides

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