MoS2 hierarchical hollow cubic cages assembled by bilayers: one-step synthesis and their electrochemical hydrogen storage properties

Ye, Lina; Wu, Changzheng; Guo, Wenjuan; Xie, Yi

doi:10.1039/b610601c

Cited by 140 publications

(95 citation statements)

References 32 publications

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“…Many reports have involved the application of MoS2 in lithium-ion batteries, since lithium ions can intercalate between the layers. [30][31][32] Remarkably, expanded MoS2, fabricated via lithiation method with an enlarged c lattice parameter, has achieved higher capacity with longer cycling span than commercial MoS2 (C-MoS2). The expanded MoS2 tends to be prone to serious restacking, however, due to its high surface energy.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Sodium‐Ion Batteries and Sodium‐Ion Pseudocapacitors Based on MoS₂/Graphene Composites

Wang

Chou

Wexler

et al. 2014

Chemistry A European J

199

149

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Dou, S. (2014). High-performance sodium-ion batteries and sodium-ion pseudocapacitors based on MoS2/graphene composites. Chemistry: A European Journal, 20 (31), 9607-9612.High-performance sodium-ion batteries and sodium-ion pseudocapacitors based on MoS2/graphene composites Abstract Sodium-ion energy storage, including sodium-ion batteries (NIBs) and electrochemical capacitive storage (NICs), is considered as a promising alternative to lithium-ion energy storage. It is an intriguing prospect, especially for large-scale applications, owing to its low cost and abundance. MoS2 sodiation/desodiation with Na ions is based on the conversion reaction, which is not only able to deliver higher capacity than the intercalation reaction, but can also be applied in capacitive storage owing to its typically sloping charge/ discharge curves. Here, NIBs and NICs based on a graphene composite (MoS2/G) were constructed. The enlarged d-spacing, a contribution of the graphene matrix, and the unique properties of the MoS2/G substantially optimize Na storage behavior, by accommodating large volume changes and facilitating fast ion diffusion. MoS2/G exhibits a stable capacity of approximately 350 mAh g−1 over 200 cycles at 0.25 C in half cells, and delivers a capacitance of 50 F g−1 over 2000 cycles at 1.5 C in pseudocapacitors with a wide voltage window of 0.1-2.5 V.

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Section: Introductionmentioning

confidence: 99%

High‐Performance Sodium‐Ion Batteries and Sodium‐Ion Pseudocapacitors Based on MoS₂/Graphene Composites

Wang

Chou

Wexler

et al. 2014

Chemistry A European J

199

149

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“…11,12 In this context, layered mesoporous birnessite-type manganese oxide materials are attracting great interest due to their high surface area, low density, and good permeation. [13][14][15][16][17] However, the fabrication of birnessite-type manganese oxide architectures remains a significant challenge due to the fast and uncontrolled growth process. 18,19 Literature reviews of electrodes made from MnO 2 showed that high specific capacitance and rate capability should be obtained in principle.…”

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confidence: 99%

Design and Synthesis of Hierarchical MnO₂ Nanospheres/Carbon Nanotubes/Conducting Polymer Ternary Composite for High Performance Electrochemical Electrodes

Hou

Cheng

Hobson³

et al. 2010

Nano Lett.

912

562

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For efficient use of metal oxides, such as MnO 2 and RuO 2 , in pseudocapacitors and other electrochemical applications, the poor conductivity of the metal oxide is a major problem. To tackle the problem, we have designed a ternary nanocomposite film composed of metal oxide (MnO 2 ), carbon nanotube (CNT), and conducting polymer (CP). Each component in the MnO 2 /CNT/CP film provides unique and critical function to achieve optimized electrochemical properties. The electrochemical performance of the film is evaluated by cyclic voltammetry, and constant-current charge/discharge cycling techniques. Specific capacitance (SC) of the ternary composite electrode can reach 427 F/g. Even at high mass loading and high concentration of MnO 2 (60%), the film still showed SC value as high as 200 F/g. The electrode also exhibited excellent charge/discharge rate and good cycling stability, retaining over 99% of its initial charge after 1000 cycles. The results demonstrated that MnO 2 is effectively utilized with assistance of other components (fFWNTs and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) in the electrode. Such ternary composite is very promising for the next generation high performance electrochemical supercapacitors. KEYWORDS MnO 2; fFWNTs, PEDOT-PSS, supercapacitor, effective utilization.A s the limited availability of fossil fuel and the environmental impacts of a society based on such energy sources becoming more obvious, the need for renewable energy sources has attracted attentions of the world. Systems for electrochemical energy storage and conversion include batteries, fuel cells, and supercapacitors. Among them, supercapacitors, also known as electrical double layer capacitor, ultracapacitor, or electrochemical capacitor (EC), have attracted much attention because of their high power density, long cycle life (>100 000 cycles), and rapid charging-discharging rates.1 They can be applied in a large variety of applications, including consumer electronics, memory back-up systems, industrial power, energy management, public transportation, and military devices. More importantly, supercapacitors are critical components in the next generation all-electric cars and cars based on fuel cells that use hydrogen or alcohol as clean and renewable energy media.Various materials have been investigated as the electrodes in ECs, including carboneous materials, 2-4 conducting polymers 5,6 and transition-metal oxides. 7,8 MnO 2 is generally considered to be the most promising transition metal oxides for the next generation of supercapacitors because of its high-energy density, low cost, environmental friendliness, and natural abundance. 9,10The published results thus far established that the electrochemical performance of MnO 2 depended on their morphology, porosity, specific surface area, electrical conductivity and ionic transport within the pores. 11,12 In this context, layered mesoporous birnessite-type manganese oxide materials are attracting great interest due to their high surface area, low density, a...

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“…The SEM micrograph of sample in Figure 3a Figure 3b. The crystalline part of MoS 2 consists of polygonal particles which may exhibit lamellar structure as also noted by Ye et al [25]. However, small clusters appear on the surface as shown in Figure 3b.…”

Section: Properties and Characteristics Of Catalystsmentioning

confidence: 71%

Synthesis of Alcohols and Alkanes from CO and H2 over MoS2/γ-Al2O3 Catalyst in a Packed Bed with Continuous Flow

et al. 2012

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Effects of reaction conditions on the production of alcohols (AOHs) and alkanes (Alk) from CO and H 2 , which can be obtained from the gasification of biomass, using a molybdenum sulfide (MoS 2 )-based catalyst of MoS 2 /γ-Al 2 O 3 were studied. A high-pressure fixed packed bed (HPFPB) was employed to carry out the reaction. The results indicate that the conversion of CO (X CO ) and specific production rates of alcohol (SPR AOH ) and alkane (SPR Alk ) are highly depended on temperature (T). In T = 423-573 K, maximum yield of alcohols (Y AOH ) and SPR AOH occur at T = 523 K. In the meantime, well performance gives the selectivity of ethanol (S EtOH ) of 52.0 C%. For the studies on varying H 2 /CO mole ratio (M H/C ) from 1 to 4 at 523 K, the appropriate M H/C to produce EtOH is 2, giving higher ratios of SPR AOH /SPR Alk and Y AOH /Y Alk than those with other M H/C . As for varying the total gas flow rates (Q G ) of 300, 450, 600 to 900 cm 3 min −1 tested at T = 523 K and M H/C = 2, the lower Q G provides longer reaction time (or gaseous retention time, t R ) thus OPEN ACCESSEnergies 2012, 5 4148 offering higher X CO , however lower productivity. For setting pressure (P ST ) = 225-540 psi, a supply of higher pressure is equivalent to providing a larger amount of reactants into the reaction system, this thus suggests the use of higher P ST should give both higher X CO and productivity. The assessment of the above results indicates that the MoS 2 /γ-Al 2 O 3 catalyst favors the production of alcohols over alkanes, especially for ethanol. The information obtained is useful for the proper utilization of biomass derived gases of CO and H 2 .

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MoS2 hierarchical hollow cubic cages assembled by bilayers: one-step synthesis and their electrochemical hydrogen storage properties

Cited by 140 publications

References 32 publications

High‐Performance Sodium‐Ion Batteries and Sodium‐Ion Pseudocapacitors Based on MoS₂/Graphene Composites

High‐Performance Sodium‐Ion Batteries and Sodium‐Ion Pseudocapacitors Based on MoS₂/Graphene Composites

Design and Synthesis of Hierarchical MnO₂ Nanospheres/Carbon Nanotubes/Conducting Polymer Ternary Composite for High Performance Electrochemical Electrodes

Synthesis of Alcohols and Alkanes from CO and H2 over MoS2/γ-Al2O3 Catalyst in a Packed Bed with Continuous Flow

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MoS2 hierarchical hollow cubic cages assembled by bilayers: one-step synthesis and their electrochemical hydrogen storage properties

Cited by 140 publications

References 32 publications

High‐Performance Sodium‐Ion Batteries and Sodium‐Ion Pseudocapacitors Based on MoS2/Graphene Composites

High‐Performance Sodium‐Ion Batteries and Sodium‐Ion Pseudocapacitors Based on MoS2/Graphene Composites

Design and Synthesis of Hierarchical MnO2 Nanospheres/Carbon Nanotubes/Conducting Polymer Ternary Composite for High Performance Electrochemical Electrodes

Synthesis of Alcohols and Alkanes from CO and H2 over MoS2/γ-Al2O3 Catalyst in a Packed Bed with Continuous Flow

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Product

Resources

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High‐Performance Sodium‐Ion Batteries and Sodium‐Ion Pseudocapacitors Based on MoS₂/Graphene Composites

High‐Performance Sodium‐Ion Batteries and Sodium‐Ion Pseudocapacitors Based on MoS₂/Graphene Composites

Design and Synthesis of Hierarchical MnO₂ Nanospheres/Carbon Nanotubes/Conducting Polymer Ternary Composite for High Performance Electrochemical Electrodes