Facile fabrication of multiwalled carbon nanotube/α-MnOOH coaxial nanocable films by electrophoretic deposition for supercapacitors

Fang, Hua; Zhang, Shichao; Wu, Xiaomeng; Liu, Wenbo; Wen, Bohua; Du, Zhijia; Jiang, Tao

doi:10.1016/j.jpowsour.2013.01.195

Cited by 63 publications

(37 citation statements)

References 39 publications

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“…Meanwhile, the NO 3 À ions of manganese nitrate are electrochemically reduced with H 2 O and, then, the OH À ions produced move toward the CNFeMn 2þ without diffusing into the bulk solution. The Mn(OH) 2 deposited on the surface of the CNFs is formed due to the rapid reaction between Mn 2þ and OH À , but Mn(OH) 2 is oxidized into Mn 3 O 4 immediately after it is synthesized, because of its highly unstable characteristics and the oxidizing atmosphere created by the hydrous ethanol solution [26]. The mechanism of synthesizing Mn 3 O 4 deposited on the surface of the CNF cathode is as follows:…”

Section: Resultsmentioning

confidence: 99%

“…Then, the CNF/Mn(OH) 2 nanocables are prepared as Mn(OH) 2 is deposited on the surface of the CNF cores. The Mn(OH) 2 is converted into Mn 3 O 4 during the EPD process, because Mn(OH) 2 is highly unstable [26]. The product was annealed at 250 C for 2 h under an air atmosphere to obtain good crystallinity.…”

Section: Preparation Of Coaxial Carbon Nanofiber/mn 3 O 4 Coreeshell mentioning

confidence: 99%

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Hierarchically mesoporous carbon nanofiber/Mn 3 O 4 coaxial nanocables as anodes in lithium ion batteries

Park

Lee

2015

Journal of Power Sources

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Section: Resultsmentioning

confidence: 99%

Section: Preparation Of Coaxial Carbon Nanofiber/mn 3 O 4 Coreeshell mentioning

confidence: 99%

Hierarchically mesoporous carbon nanofiber/Mn 3 O 4 coaxial nanocables as anodes in lithium ion batteries

Park

Lee

2015

Journal of Power Sources

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“…35,36 In the typical synthesis of LFP/CNT nanocomposite, 0.3 g of the as- 20 prepared CNTs was first dispersed in 400 ml purified water and stirring for 10 min. Then, 0.1 mol Fe(NO 3 ) 3 ·9H 2 O (≥ 99.5%, Aladdin) was dissolved in the CNT solution with ultrasonic treatment for 10 min.…”

Section: Methodsmentioning

confidence: 99%

“…The obtained mixture powder was grounded carefully with a mortar and a pestle and then transferred to a tube 35 furnace, where it was annealed under reducing atmosphere. The tube was purged with 10% hydrogen and 90% argon for 0.5 h before heating started (flow rate: 150 cc/min).…”

Section: Methodsmentioning

confidence: 99%

“…Li ion batteries (LIBs) have been considered as one of the most promising environmentally friendly energy conversion and 35 storage devices because of their unique advantages including high energy density and long cycle life. 1-4 However, more efforts are still needed to upgrade the performance of LIBs for their further applications in EVs and HEVs, because they require high capacity, power density and safety.…”

Section: Introductionmentioning

confidence: 99%

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Porous micro-spherical LiFePO₄/CNT nanocomposite for high-performance Li-ion battery cathode material

et al. 2015

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Although many routes have been developed that can efficiently improve the electrochemical performance of LiFePO 4 (LFP) cathode for Li ion batteries, few of them meet the urgent industrial requirements: large scale production, low cost and excellent performance. In this work, via a hydrothermal synthetic proceed followed by a high-temperature lithiation, we are able to design porous micro-spherical LFP/Carbon 10 Nanotubes (CNTs) nanocomposite. The efficient combination of the inside CNTs and the outside carbon layer, as well as the porous structure of the LFP/CNT nanocomposite lead to its excellent electrochemical performance. As cathode material for Li ion batteries, the discharge capacity of the nanocomposite can reach 122 mAh/g at 20 C. After 500 cycles, capacity retention of 94.3 % can be reached at 1 C. Because of the facile and easily scale up synthsized method, low cost raw materials and the excellent 15 electrochemical performance, the as-designed LFP/CNT nanocomposite can be expected as a potential cathode candidate for Li ion batteries.

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Highly Efficient Materials Assembly Via Electrophoretic Deposition for Electrochemical Energy Conversion and Storage Devices

Wen

Zhang

et al. 2016

Advanced Energy Materials

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and fi lms can be assembled on substrates with this versatile method. Film thickness, particle size and inter structure of EPD fi lms are controllable by adjusting the suspension/process parameters. [ 2,3 ] Energy conversion and storage devices have been developed rapidly in the past few decades, and proposed as the foundation of modern society. Novel carbon materials such as graphene and carbon nanotubes (CNTs) are investigated widely for high-effi ciency rechargeable battery and supercapacitor (SC) applications. [ 4,5 ] Traditional methods such as blade coating and slot die are employed to prepare electrodes to realize such applications. [ 6,7 ] In these methods, active materials are dissolved into a solvent to form a viscous solution, and a fi lm is obtained after coating and solvent evaporation. Nevertheless, neither thickness control nor a high fi lm assembly effi ciency can be realized via these methods. In addition, traditional methods exhibit limitation on the fabrication of nanostructured energy materials due to the aggregation of nanoparticles. On the other hand, methods for micro-batteries such as vapor deposition methods, [ 8 ] radio-frequency sputtering, [ 9 ] and pulsed laser deposition [ 10,11 ] are expensive and diffi cult to scale up. Indeed, a versatile EPD technique with cost-effectiveness, short formation time, and high scalability is promising for efficient fabrication of energy conversion and storage materials and devices. A typical EPD process is performed in two steps, including the dispersion of powder particles in a solvent to form a stable suspension and the deposition of particles on a substrate in the presence of an electric fi eld. [ 12,13 ] Preparation of a stable suspension is essential to the deposition process. The stability of suspension, adjustable with surfactants, is correlated with electrostatic repulsive and van der Waals attractive interactions. The stability of suspension/colloid is characterized by zeta potential, the value of which represents the magnitude of repulsive interaction while the sign represents the migration direction of particles. Zeta potential is mainly determined by temperature, pH, and type of surfactant. On the other hand, the migration velocity of particles in deposition depends on the applied voltage/current, particle size, zeta potential, suspension concentration, and solvent viscosity. [ 14 ] The utilization of EPD in the energy storage/conversion devices fi eld enables the direct deposition of active particles on the current collector.Featuring pronounced controllability, versatility, and scalability, electrophoretic deposition (EPD) has been proposed as an effi cient method for fi lm assembly and electrode/solid electrolyte fabrication in various energy storage/conversion devices including rechargeable batteries, supercapacitors, and fuel cells. High-quality electrodes and solid electrolytes have been prepared through EPD and exhibit advantageous performances in comparison with those realized with traditional methods. Recent advances in the appli...

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Facile fabrication of multiwalled carbon nanotube/α-MnOOH coaxial nanocable films by electrophoretic deposition for supercapacitors

Cited by 63 publications

References 39 publications

Hierarchically mesoporous carbon nanofiber/Mn 3 O 4 coaxial nanocables as anodes in lithium ion batteries

Hierarchically mesoporous carbon nanofiber/Mn 3 O 4 coaxial nanocables as anodes in lithium ion batteries

Porous micro-spherical LiFePO₄/CNT nanocomposite for high-performance Li-ion battery cathode material

Highly Efficient Materials Assembly Via Electrophoretic Deposition for Electrochemical Energy Conversion and Storage Devices

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Facile fabrication of multiwalled carbon nanotube/α-MnOOH coaxial nanocable films by electrophoretic deposition for supercapacitors

Cited by 63 publications

References 39 publications

Hierarchically mesoporous carbon nanofiber/Mn 3 O 4 coaxial nanocables as anodes in lithium ion batteries

Hierarchically mesoporous carbon nanofiber/Mn 3 O 4 coaxial nanocables as anodes in lithium ion batteries

Porous micro-spherical LiFePO4/CNT nanocomposite for high-performance Li-ion battery cathode material

Highly Efficient Materials Assembly Via Electrophoretic Deposition for Electrochemical Energy Conversion and Storage Devices

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Porous micro-spherical LiFePO₄/CNT nanocomposite for high-performance Li-ion battery cathode material