Boosting Sodium Storage of Fe1−xS/MoS2 Composite via Heterointerface Engineering

Chen, Song; Huang, Shaozhuan; Hu, Junping; Fan, Shuang; Shang, Yang; Pam, Mei Er; Li, Xiaoxia; Wang, Ye; Xu, Tingting; Shi, Yumeng; Yang, Hui

doi:10.1007/s40820-019-0311-z

Cited by 88 publications

(85 citation statements)

References 69 publications

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“…[ 58–61 ] To study the LiPs adsorption energies on pyrrhotite (Fe 1− x S), surface models of Fe 7 S 8 , FeS 2 , and Fe 3 S 4 are employed in accordance with previous literatures. [ 62–67 ] For the surface calculations, we study the (001) surfaces, which have previously been shown to be the most stable surface termination for these materials. [ 67 ] These surface models have previously been used to study the sodium storage in Fe 1− x S/MoS 2 composites, [ 62 ] as a monolayer for oxygen evolution reaction, [ 63 ] and for oxygen incorporation.…”

Section: Resultsmentioning

confidence: 99%

“…[ 62–67 ] For the surface calculations, we study the (001) surfaces, which have previously been shown to be the most stable surface termination for these materials. [ 67 ] These surface models have previously been used to study the sodium storage in Fe 1− x S/MoS 2 composites, [ 62 ] as a monolayer for oxygen evolution reaction, [ 63 ] and for oxygen incorporation. [ 65 ] The adsorption energies of LiPs on different carbon sulfur nitrogen structures have been well studied in the literature and are hence only discussed briefly here.…”

Section: Resultsmentioning

confidence: 99%

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Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Boyjoo

Shi

Olsson

et al. 2020

Advanced Energy Materials

114

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of 2600 Wh kg −1 and are recognized as one of high energy density storage devices for practical applications. In LSBs the cathode material is mainly sulfur, which is abundantly available, low cost, environmentally friendly and has high theoretical capacity of 1675 mAh g −1 . [1][2][3][4][5][6] However, the challenging issues associated with sulfur-based cathodes are: 1) the low electrical conductivity of sulfur, 2) the dissolution and shuttling effects of lithium polysulfides (LiPs), and 3) large volume variations during charge/discharge cycles. These bring about low efficiency, poor cycling stability, self-discharge phenomena, and ultimately degradation of the electrode material, all of which currently limit the potential commercialization of LSBs. These drawbacks, especially the difficulty to confine LiPs are the current research priorities in the field of LSBs. [1,7,8] To overcome these problems, a vast amount of research has been carried out in the last decade. The encapsulation of sulfur in a conductive carbon host can effectively improve the electrical conductivity of sulfur. Moreover, carbon offers a physical barrier that encapsulates the LiP intermediates. [9][10][11][12] Nevertheless, such weak physical confinement is not enough to suppress the eventual diffusion of LiPs over time. [13] Due to the polar nature of LiPs, the strategies involving functional polar substrates as Lithium-sulfur batteries (LSBs) are a class of new-generation rechargeable high-energy-density batteries. However, the persisting issue of lithium polysulfides (LiPs) dissolution and the shuttling effect that impedes the efficiency of LSBs are challenging to resolve. Herein a general synthesis of highly dispersed pyrrhotite Fe 1−x S nanoparticles embedded in hierarchically porous nitrogen-doped carbon spheres (Fe 1−x S-NC) is proposed.Fe 1−x S-NC has a high specific surface area (627 m 2 g −1 ), large pore volume (0.41 cm 3 g −1 ), and enhanced adsorption and electrocatalytic transition toward LiPs. Furthermore, in situ generated large mesoporous pores within carbon spheres can accommodate high sulfur loading of up to 75%, and sustain volume variations during charge/discharge cycles as well as improve ionic/mass transfer. The exceptional adsorption properties of Fe 1−x S-NC for LiPs are predicted theoretically and confirmed experimentally. Subsequently, the electrocatalytic activity of Fe 1−x S-NC is thoroughly verified. The results confirm Fe 1−x S-NC is a highly efficient nanoreactor for sulfur loading. Consequently, the Fe 1−x S-NC nano reactor performs extremely well as a cathodic material for LSBs, exhibiting a high initial capacity of 1070 mAh g −1 with nearly no capacity loss after 200 cycles at 0.5 C. Furthermore, the resulting LSBs display remarkably enhanced rate capability and cyclability even at a high sulfur loading of 8.14 mg cm −2 .

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Boyjoo

Shi

Olsson

et al. 2020

Advanced Energy Materials

114

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“…Ahn et al 41 applied pyrrhotite as a functional additive in a sulfur cathode to improve its conductivity and trap lithium polysulfides in Li-S batteries. In the case of NIBs, pyrrhotite has served as not only a conductive core in heterostructured composites 42,43 but also a single active material 44,45 . Surprisingly, there has not been any work on pyrrhotite in the application of KIBs.…”

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confidence: 99%

Pyrrhotite Fe1−xS microcubes as a new anode material in potassium-ion batteries

Bahmani

Wei

2020

Microsyst Nanoeng

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Potassium-ion batteries are an emerging energy storage technology that could be a promising alternative to lithium-ion batteries due to the abundance and low cost of potassium. Research on potassium-ion batteries has received considerable attention in recent years. With the progress that has been made, it is important yet challenging to discover electrode materials for potassium-ion batteries. Here, we report pyrrhotite Fe1−xS microcubes as a new anode material for this exciting energy storage technology. The anode delivers a reversible capacity of 418 mAh g−1 with an initial coulombic efficiency of ~70% at 50 mA g−1 and a great rate capability of 123 mAh g−1 at 6 A g−1 as well as good cyclability. Our analysis shows the structural stability of the anode after cycling and reveals surface-dominated K storage at high rates. These merits contribute to the obtained electrochemical performance. Our work may lead to a new class of anode materials based on sulfide chemistry for potassium storage and shed light on the development of new electrochemically active materials for ion storage in a wider range of energy applications.

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“…Moreover, the built-in electric field with an n → p direction could facilitate sodium ions in the heterostructure leading to a fast ion transport kinetics. The built-in electric field and matched energy band of the heterostructures provide the multi-component metal sulfides with better electronic conductivity and faster ion diffusion [59][60][61]. Constructing heterostructures with various transition metal sulfides can enhance the electrochemical activity and sodium storage performance [33].…”

Section: Heterostructuresmentioning

confidence: 99%

Progress and Prospects of Transition Metal Sulfides for Sodium Storage

Yao

et al. 2020

Adv. Fiber Mater.

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Sodium-ion battery (SIB), one of most promising battery technologies, offers an alternative low-cost solution for scalable energy storage. Developing advanced electrode materials with superior electrochemical performance is of great significance for SIBs. Transition metal sulfides that emerge as promising anode materials have advantageous features particularly for electrochemical redox reaction, including high theoretical capacity, good cycling stability, easily-controlled structure and modifiable chemical composition. In this review, recent progress of transition metal sulfides based materials for SIBs is summarized by discussing the materials properties, advanced design strategies, electrochemical reaction mechanism and their applications in sodium-ion full batteries. Moreover, we propose several promising strategies to overcome the challenges of transition metal sulfides for SIBs, paving the way to explore and construct advanced electrode materials for SIBs and other energy storage devices.

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Boosting Sodium Storage of Fe1−xS/MoS2 Composite via Heterointerface Engineering

Cited by 88 publications

References 69 publications

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Molecular‐Level Design of Pyrrhotite Electrocatalyst Decorated Hierarchical Porous Carbon Spheres as Nanoreactors for Lithium–Sulfur Batteries

Pyrrhotite Fe1−xS microcubes as a new anode material in potassium-ion batteries

Progress and Prospects of Transition Metal Sulfides for Sodium Storage

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