Ultrathin molybdenum diselenide nanosheets anchored on multi-walled carbon nanotubes as anode composites for high performance sodium-ion batteries

Zhang, Zhian; Xing, Yang; Fu, Yuqing; Du, Ke

doi:10.1016/j.jpowsour.2015.07.008

Cited by 124 publications

(61 citation statements)

References 31 publications

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“…[8][9][10] MoSe 2 , a representative type of layered transition metal dichalcogenide (TMD) material, exhibits high theoretical capacity, large interlayer spacing, and small bandgap, and thus has been proved to be a good candidate anode material for SIBs. According to previous research, [16][17][18][19] construction of rational nanostructures and formation of carbon-based composites are effective approaches. According to previous research, [16][17][18][19] construction of rational nanostructures and formation of carbon-based composites are effective approaches.…”

Section: Introductionmentioning

confidence: 99%

TiO₂‐Coated Interlayer‐Expanded MoSe₂/Phosphorus‐Doped Carbon Nanospheres for Ultrafast and Ultralong Cycling Sodium Storage

Wang

Kang

et al. 2018

Advanced Science

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Based on multielectron conversion reactions, layered transition metal dichalcogenides are considered promising electrode materials for sodium‐ion batteries, but suffer from poor cycling performance and rate capability due to their low intrinsic conductivity and severe volume variations. Here, interlayer‐expanded MoSe2/phosphorus‐doped carbon hybrid nanospheres coated by anatase TiO2 (denoted as MoSe2/P‐C@TiO2) are prepared by a facile hydrolysis reaction, in which TiO2 coating polypyrrole‐phosphomolybdic acid is utilized as a novel precursor followed by a selenization process. Benefiting from synergistic effects of MoSe2, phosphorus‐doped carbon, and TiO2, the hybrid nanospheres manifest unprecedented cycling stability and ultrafast pseudocapacitive sodium storage capability. The MoSe2/P‐C@TiO2 delivers decent reversible capacities of 214 mAh g−1 at 5.0 A g−1 for 8000 cycles, 154 mAh g−1 at 10.0 A g−1 for 10000 cycles, and an exceptional rate capability up to 20.0 A g−1 with a capacity of ≈175 mAh g−1 in a voltage range of 0.5–3.0 V. Coupled with a Na3V2(PO4)3@C cathode, a full cell successfully confirms a reversible capacity of 242.2 mAh g−1 at 0.5 A g−1 for 100 cycles with a coulombic efficiency over 99%.

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Section: Introductionmentioning

confidence: 99%

TiO₂‐Coated Interlayer‐Expanded MoSe₂/Phosphorus‐Doped Carbon Nanospheres for Ultrafast and Ultralong Cycling Sodium Storage

Wang

Kang

et al. 2018

Advanced Science

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“…Figure 3C,D represents the HR-TEM micrographs of the MoSe 2 with different magnifications which showed the presence of sheet-like MoSe 2 overlapping with each other. [39] The SCSPC device was fabricated using the prepared MoSe 2 nanosheets as electrode material with PVDF-co-HFP/tetraethylammonium tetrafluoroborate (TEABF 4 ) ion gelled PVDF/ NaNbO 3 as the piezopolymer separator. [39] The SCSPC device was fabricated using the prepared MoSe 2 nanosheets as electrode material with PVDF-co-HFP/tetraethylammonium tetrafluoroborate (TEABF 4 ) ion gelled PVDF/ NaNbO 3 as the piezopolymer separator.…”

Section: Resultsmentioning

confidence: 99%

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

Pazhamalai

Krishnamoorthy

Mariappan

et al. 2018

Adv Materials Inter

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compartments, namely, (i) energy harvesting and (ii) energy storage in which the former generates the energy while the latter is used to store the generated energy. [6,7] Renewable energy sources such as solar, wind, hydropower, mechanical energy (piezoelectric/triboelectric nanogenerator), and electrochemical energy (fuel cells) are used as energy harvesting system, whereas batteries and supercapacitors are used as energy storing system in the design of selfcharging power system. [8][9][10][11][12] Renewable power source based self-charging power system such as coupling of the solar cell/ photovoltaics with the electrochemical energy storage are commercialized for making use of the photon energy into useful energy. [13,14] Hitherto, the utilization of biomechanical energy for the selfcharging system is still in research level, and further efforts are needed to be undertaken for practical applications. The concept of self-charging and/or self-powered system for harvesting and storing mechanical and/or biomechanical energy becomes plausible after the research findings of Wang and co-workers for the first time when they designed a self-powered system using nanogenerator (NG) and supercapacitor in 2012. [2] Up to date two different types of self-charging power cells have been reported such as (i) external powering and (ii) internally integrating the system. [8,[15][16][17] In the former case, the mechanical energy harvester is externally connected to the energy storage device using a rectifier, whereas the latter uses an all-in-one integrated system which will be beneficial for several applications in portable and wearable devices due to their miniaturized size. [18,19] The pulsating alternating current output of nanogenerator is the major concern for the practical application of NG based self-charging power cells (SCPCs) due to their low energy conversion efficiency. [7,20] Therefore, the design and development of high-performance self-charging power cell with high energy conversion efficiency are highly essential. In this scenario, integrated self-charging supercapacitor power cell (SCSPC) utilizing supercapacitor as energy storage device attracts much attention compared to batteries mainly due to the fast charging rates of a capacitive type electrode; it can scavenge/store the piezo-electrochemically generated Self-charging supercapacitor power cell (SCSPC) received much attention for harvesting and storing energy in an integrated device, which paves the way for developing maintenance free autonomous power systems for various electronic devices. In this work, a new type of SCSPC device is fabricated comprising 2D molybdenum di-selenide (MoSe 2 ) as an energy storing electrode with polyvinylidene fluoride-co-hexafluoropropylene/ tetraethylammonium tetrafluoroborate (PVDF-co-HFP/TEABF 4 ) ion gelled polyvinylidene fluoride/sodium niobate (PVDF/NaNbO 3 ) as the piezopolymer electrolyte. The fabricated SCSPC delivers a specific capacitance of 18.93 mF cm −2 with a specific energy of 37.90 mJ cm −2 at a specific power...

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“…During the anodic scan, we could see two oxidation peaks at 0.8 and 1.75 V and this phenomenon is due to the partial oxidation of Mo and Na2Se [17]. Meanwhile, after the first cycle, one peak at 1.4 V shows up, and the two peaks at 0.44 and 0.65 V in the first cathodic sweep disappear, which may result from the reversible reaction of Mo 4+ + 2Na2Se ↔ MoSe2 + 4Na + [16,35]. No obvious changes can be observed for the following redox peaks, demonstrating the excellent stability of the electrode.…”

Section: Sodium Storage Performancementioning

confidence: 91%

Constructing monodispersed MoSe2 anchored on graphene: a superior nanomaterial for sodium storage

et al. 2016

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We reported a facile and robust one-pot wet chemistry strategy to achieve the growth of uniform three dimensional (3D) MoSe2 ultrathin nanostructures on graphene nanosheets to form high quality MoSe2/rGO hybrid nanostructures. Owing to the graphene as a support, it can significantly prevent the aggregation of MoSe2 and the distribution of MoSe2 on graphene was highly uniform. Importantly, due to the unique structures, the as-harvested MoSe2/rGO hybrid exhibited excellent electrochemical performance as anode materials for sodium-ion battery (SIB). When evaluated in a half cell system, the MoSe2/rGO hybrid nanostructures could deliver a capacity of 200.2 mA h g −1 at 8 A g −1 and maintain a capacity of 230.1 mA h g −1 over 100 cycles at 5 A g −1 . When coupled with Na3V2(PO4)3 cathode in a full cell system, the material could deliver a discharge capacity of 363.1 mA h g −1 at the current density of 0.5 A g −1 . Moreover, a discharge capacity of 56.4 mA h g −1 could be achieved even at a high current density of 10 A g −1 , which clearly suggested the high power capability of MoSe2/rGO hybrid nanostructures for sodium ion energy storage.

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Ultrathin molybdenum diselenide nanosheets anchored on multi-walled carbon nanotubes as anode composites for high performance sodium-ion batteries

Cited by 124 publications

References 31 publications

TiO₂‐Coated Interlayer‐Expanded MoSe₂/Phosphorus‐Doped Carbon Nanospheres for Ultrafast and Ultralong Cycling Sodium Storage

TiO₂‐Coated Interlayer‐Expanded MoSe₂/Phosphorus‐Doped Carbon Nanospheres for Ultrafast and Ultralong Cycling Sodium Storage

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

Constructing monodispersed MoSe2 anchored on graphene: a superior nanomaterial for sodium storage

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Ultrathin molybdenum diselenide nanosheets anchored on multi-walled carbon nanotubes as anode composites for high performance sodium-ion batteries

Cited by 124 publications

References 31 publications

TiO2‐Coated Interlayer‐Expanded MoSe2/Phosphorus‐Doped Carbon Nanospheres for Ultrafast and Ultralong Cycling Sodium Storage

TiO2‐Coated Interlayer‐Expanded MoSe2/Phosphorus‐Doped Carbon Nanospheres for Ultrafast and Ultralong Cycling Sodium Storage

A High Efficacy Self‐Charging MoSe2 Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

Constructing monodispersed MoSe2 anchored on graphene: a superior nanomaterial for sodium storage

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TiO₂‐Coated Interlayer‐Expanded MoSe₂/Phosphorus‐Doped Carbon Nanospheres for Ultrafast and Ultralong Cycling Sodium Storage

TiO₂‐Coated Interlayer‐Expanded MoSe₂/Phosphorus‐Doped Carbon Nanospheres for Ultrafast and Ultralong Cycling Sodium Storage

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte