2D MoS2 grown on biomass-based hollow carbon fibers for energy storage

Liu, Guilong; Cui, Jiang; Luo, Rongjie; Liu, Yong; Huang, Xiaoxiao; Wu, Naiteng; Jin, Xueyang; Chen, Haipeng; Tang, Siye; Kim, Jang Kyo; Liu, Xianming

doi:10.1016/j.apsusc.2018.11.067

Cited by 80 publications

(37 citation statements)

References 56 publications

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“…However, the adjacent sodiation channels are subject to the lattice distortion due to the intercalation-induced volume change ( Figure S6, Supporting Information), and later show the electrochemically alloyed phases such as NaP and Na 3 P that gradually precipitate out of the BP matrix (Figure 4c,d) and eventually transform into the pure Na 3 P phase after complete sodiation. Interestingly, as shown in Figure 6b, Li diffusion along the zigzag direction of BP has a similar energy barrier (97 meV) compared to that of the Na (93 meV), both of which are much smaller than those of widely studied 2D vdW anode materials such as MoS 2 [44] and SnS 2 . Figure 5a shows the experimentally measured lowloss EELS spectra containing bulk plasmon peaks, where the pristine BP plasmon peak maximum locates at 19.2 eV with a relatively narrow peak width, while the sodiated BP shows a redshift to 17.3 eV as well as a broadened peak width.…”

Section: Doi: 101002/adma201904623mentioning

confidence: 85%

Orientation‐Dependent Intercalation Channels for Lithium and Sodium in Black Phosphorus

et al. 2019

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can also accommodate foreign species in its interlayer spacing via intercalation, and it has been found that alkali metal intercalated BP can lead to the tunable bandgap [8] and also exhibit superconductivity. [9] Moreover, the capability to intercalate alkali metals can make BP a potential electrochemical reservoir for energy storage, similar to the graphite used for rechargeable ion batteries. The theoretical specific ion storage capacity for Li-ion batteries (LIBs) and Na-ion batteries (NIBs) can be as high as 2596 mAh g −1 , which is almost one order of magnitude higher than the commercial graphite-based materials (372 mAh g −1 ), holding great promise for future applications ranging from portable electronic devices to large-scale electrical vehicles and power tools. [10][11][12][13][14][15][16] Doubtless, BP intercalation compounds are of both scientific and technological importance in multiple critical fields, but the fundamental understanding of the underlying intercalation mechanism remains largely elusive. To bridge up this knowledge gap, we present an in situ investigation on the intercalation of BP with both lithium and sodium ions.The intercalation of alkali elements has been extensively studied in rechargeable battery systems, where the alkali ions can be intercalated into the host materials via electrochemical reactions. Specifically, a great effort has been devoted to the intercalation of lithium and sodium in a large variety of 2D materials, including graphite, [17,18] borophane, [19] transition metal dichalcogenides, [20][21][22][23] transition metal carbides/carbonitrides, [24,25] and tin-based compounds, [26][27][28] which have larger interlayer spacing bonded by vdW interaction to offer sufficient ionic transport pathway. Orthorhombic BP is the most thermodynamically stable structure compared to other two allotropes of white phosphorus and red phosphorus, [29,30] and has wide spacing between the 2D layers to allow the intercalation of Li and Na ions. Recently, the electrochemical intercalation behaviors of BP have been reported using in situ transmission electron microscopy (TEM) techniques. It is found that the alkali ions would intercalate into the layered host framework and then form alloying compounds with P with anisotropic volume expansion and amorphization, which has been verified in lithiation [31] and sodiation, [32] respectively. Besides, the sodium-ion transport was suggested to be anisotropic and could cause atomic stack reordering upon slight intercalation. [33,34] Although these early studies have depicted the changes in morphology and volume Black phosphorus (BP) with unique 2D structure enables the intercalation of foreign elements or molecules, which makes BP directly relevant to high-capacity rechargeable batteries and also opens a promising strategy for tunable electronic transport and superconductivity. However, the underlying intercalation mechanism is not fully understood. Here, a comparative investigation on the electrochemically driven intercalation of lithium and sodiu...

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Section: Doi: 101002/adma201904623mentioning

confidence: 85%

Orientation‐Dependent Intercalation Channels for Lithium and Sodium in Black Phosphorus

et al. 2019

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“…In Figure 8b, two exothermic peaks can be seen for all the samples. The peak located at 300-600 °C can be attributed to amorphous carbon; while the other peak at 600-800 °C to the graphitized carbon [39]. Seen from Figure 8b, the incorporation of K can significantly reduce the total amount and formation rate of amorphous carbon, and for that K can modulate the composition of the catalysts and produce amount of La2O3, which is beneficial to the coke elimination.…”

Section: Co Hydrogenation Performancementioning

confidence: 96%

K-Modulated Co Nanoparticles Trapped in La-Ga-O as Superior Catalysts for Higher Alcohols Synthesis from Syngas

et al. 2019

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Owing to the outstanding catalytic performance for higher alcohol synthesis, Ga-Co catalysts have attracted much attention. In view of their unsatisfactory stability and alcohol selectivity, herein, K-modulated Co nanoparticles trapped in La-Ga-O catalysts were prepared by the reduction of La1−xKxCo0.65Ga0.35O3 perovskite precursor. Benefiting from the atomic dispersion of all the elements in the precursor, during the reduction of La1−xKxCo0.65Ga0.35O3, Co nanoparticles could be confined into the K-modified La-Ga-O composite oxides, and the confinement of La-Ga-O could improve the anti-sintering performance of Co nanoparticles. In addition, the addition of K modulated parts of La-Ga-O into La2O3, which ameliorated the anti-carbon deposition performance. Finally, the addition of K increased the dispersion of cobalt and provided more electron donors to metallic Co, resulting in a high activity and superior selectivity to higher alcohols. Benefiting from the above characteristics, the catalyst possesses excellent activity, good selectivity, and superior stability.

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“…2D MoS 2 can be synthesised by chemical vapour deposition (CVD), hydrothermal synthesis and exfoliation methods . CVD offers high quality MoS 2 nanosheets, but the methodology is quite expensive and offers low productivity.…”

Section: Two‐dimensional (2d) Materials and Propertiesmentioning

confidence: 99%

Chemical Functionalisation of 2D Materials by Batch and Continuous Hydrothermal Flow Synthesis

Alli

Hettiarachchi

Kellici

2020

Chemistry A European J

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2D materials are single or few layered materials consisting of one or several elements with a thickness of a few nanometres. Their unique, tuneable physical and chemical properties including ease of chemical functionalisation makes this class of materials useful in a variety of technological applications. The feasibility of 2D materials strongly depends on better synthetic approaches to improve properties, increase performance, durability and reduce costs. As such, in the synthesis of nanomaterials, hydrothermal processes are widely adopted through a precursor–product synthesis route. This method includes batch or continuous flow systems, both employing water at elevated temperatures (above boiling point) and pressures to fine‐tune the physical, chemical, optical and electronic properties of the nanomaterial. Both techniques yield particles with different morphology, size and surface area due to different mechanisms of particle formation. In this Minireview, we present batch and continuous hydrothermal flow synthesis of a selection of 2D derivatives (graphene, MXene and molybdenum disulfide), their chemical functionalisation as an advantageous approach in exploring properties of these materials as well as the benefits and challenges of employing these processes, and an outlook for further research.

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2D MoS2 grown on biomass-based hollow carbon fibers for energy storage

Cited by 80 publications

References 56 publications

Orientation‐Dependent Intercalation Channels for Lithium and Sodium in Black Phosphorus

Orientation‐Dependent Intercalation Channels for Lithium and Sodium in Black Phosphorus

K-Modulated Co Nanoparticles Trapped in La-Ga-O as Superior Catalysts for Higher Alcohols Synthesis from Syngas

Chemical Functionalisation of 2D Materials by Batch and Continuous Hydrothermal Flow Synthesis

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