Manganese dioxide decoration of macroscopic carbon nanotube fibers: From high-performance liquid-based to all-solid-state supercapacitors

Pendashteh, Afshin; Senokos, Evgeny; Palma, Jesús; Anderson, Marc A.; Vilatela, Juan J.; Marcilla, Rebeca

doi:10.1016/j.jpowsour.2017.10.068

Cited by 55 publications

(42 citation statements)

References 56 publications

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“…Carbon and manganese oxide composites have been attracting much attentioni nt he search for good preparation methods [52][53][54][55] and improved electrochemical performance. [56][57][58][59] Dif- ferent from previous reports, herein, HCF/Mn 3 O 4 prepared by in situ synthesis exhibits as pecial nanostructure that is favorable for achieving excellent cycling stability and rate performance for LIBs.…”

Section: Resultsmentioning

confidence: 99%

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

Zhang

Jiang

et al. 2018

Chemistry A European J

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The practical applications of Mn O in lithium-ion batteries are greatly hindered by fast capacity decay and poor rate performance as a result of significant volume changes and low electrical conductivity. It is believed that the synthesis of nanoscale Mn O combined with carbonaceous matrix will lead to a better electrochemical performance. Herein, a convenient route for the synthesis of Mn O nanoparticles grown in situ on hollow carbon nanofiber (denoted as HCF/Mn O ) is reported. The small size of Mn O particles combined with HCF can significantly alleviate volume changes and electrical conductivity; the strong chemical interactions between HCF and Mn O would improve the reversibility of the conversion reaction for MnO into Mn O and accelerate charge transfer. These features endow the HCF/Mn O composite with superior cycling stability and rate performance if used as the anode for lithium-ion batteries. The composite delivers a high discharge capacity of 835 mA h g after 100 cycles at 200 mA g , and 652 mA h g after 240 cycles at 1000 mA g . Even at 2000 mA g , it still shows a high capacity of 528 mA h g . The facile synthetic method and outstanding electrochemical performance of the as-prepared HCF/Mn O composite make it a promising candidate for a potential anode material for lithium-ion batteries.

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Section: Resultsmentioning

confidence: 99%

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

Zhang

Jiang

et al. 2018

Chemistry A European J

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“…7 The resulting multifunctional performance in terms of mechanical properties and particularly high energy density, is due to the extraordinary electrochemical properties of CNT fibers (high surface area and electrical conductivity), combined with the CF acting as mechanical reinforcement. The estimated value for CNT fiber-based interleaves is for non-Faradaic EDLC, but recent work on chemical functionalization 23 and deposition of metal oxides 22 of these veils suggests that further increases of 40-130% in energy density are easily within reach. Applying current models to assess performance of multifunctional structures 12 , 13 , we observe that the introduction of higher energydensity pseudocapacitve reactions, combined with a reduction in polymer electrolyte membrane thickness, would led to a multifunctional composite structure with reduced weight relative to monofunctional systems (SI).…”

Section: Mechanical Interconnection Using Perforated Interleavesmentioning

confidence: 99%

Energy storage in structural composites by introducing CNT fiber/polymer electrolyte interleaves

Senokos

Torres

et al. 2018

Sci Rep

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This work presents a method to produce structural composites capable of energy storage. They are produced by integrating thin sandwich structures of CNT fiber veils and an ionic liquid-based polymer electrolyte between carbon fiber plies, followed by infusion and curing of an epoxy resin. The resulting structure behaves simultaneously as an electric double-layer capacitor and a structural composite, with flexural modulus of 60 GPa and flexural strength of 153 MPa, combined with 88 mF/g of specific capacitance and the highest power (30 W/kg) and energy (37.5 mWh/kg) densities reported so far for structural supercapacitors. In-situ electrochemical measurements during 4-point bending show that electrochemical performance is retained up to fracture, with minor changes in equivalent series resistance for interleaves under compressive stress. En route to improving interlaminar properties we produce grid-shaped interleaves that enable mechanical interconnection of plies by the stiff epoxy. Synchrotron 3D X-ray tomography analysis of the resulting hierarchical structure confirms the formation of interlaminar epoxy joints. The manuscript discusses encapsulation role of epoxy, demonstrated by charge-discharge measurements of composites immersed in water, a deleterious agent for ionic liquids. Finally, we show different architectures free of current collector and electrical insulators, in which both CNT fiber and CF act as active electrodes.

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“…Porous hybrid nanostructures were synthesized by sacrificial template method . Figure a illustrated that NaCl and multiwall CNTs powder or CNTs@MnO 2 powder were added into uncured PDMS.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Structure MnO₂ Coated PDMS−Carbon Nanotube Sponge as Flexible Electrode for Electrocatalytic Water Splitting and High Performance Supercapacitor

et al. 2019

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As a typical transition metal oxide, MnO2 has great potential in catalysis and energy storage, but its poor conductivity greatly limits its performance. PDMS−carbon nanotube sponges have excellent electrical conductivity and flexibility. Herein, according to the principle of complementary, we propose a novel hierarchical PDMS−carbon nanotube sponge@MnO2 electrode with uniform size and morphology. In view of the structural preponderances and multifunctional of the materials, the PDMS−carbon nanotube sponge@MnO2 has been investigated as the binder−free electrode materials for both supercapacitors and electrocatalysis applications. PDMS−carbon nanotube sponge@MnO2 electrode exhibits an admirable HER property with a low onset potential of 112 mV at −30 mA cm−2, a minimal overpotential (η=258 mV), a small Tafel slope (71 mV dec−1), large anodic currents and stability for 20 h in 0.1 M H2SO4 solution. Moreover, as supercapacitor electrode, the PDMS−carbon nanotube sponge@MnO2 electrode achieves a specific mass capacitance reaching 124.7 mF cm−2 at 1 A cm−2 and good flexibility, which are better than those ternary transition metal oxides. The assembled asymmetric device with the PDMS−carbon nanotube sponge@MnO2 and CNTs respectively as positive and negative electrode has a large window voltage of 1.4 V, and thus acquires an expected specific mass capacitance (422 mF cm−3 at the current density of 1 A cm−3) and an outstanding higher energy density of 15.3 W h kg−1 (at 371 W kg−1).

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Manganese dioxide decoration of macroscopic carbon nanotube fibers: From high-performance liquid-based to all-solid-state supercapacitors

Cited by 55 publications

References 56 publications

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

Energy storage in structural composites by introducing CNT fiber/polymer electrolyte interleaves

Hierarchical Structure MnO₂ Coated PDMS−Carbon Nanotube Sponge as Flexible Electrode for Electrocatalytic Water Splitting and High Performance Supercapacitor

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Manganese dioxide decoration of macroscopic carbon nanotube fibers: From high-performance liquid-based to all-solid-state supercapacitors

Cited by 55 publications

References 56 publications

In Situ Synthesis of Mn3O4 Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

In Situ Synthesis of Mn3O4 Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

Energy storage in structural composites by introducing CNT fiber/polymer electrolyte interleaves

Hierarchical Structure MnO2 Coated PDMS−Carbon Nanotube Sponge as Flexible Electrode for Electrocatalytic Water Splitting and High Performance Supercapacitor

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In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

Hierarchical Structure MnO₂ Coated PDMS−Carbon Nanotube Sponge as Flexible Electrode for Electrocatalytic Water Splitting and High Performance Supercapacitor