Boron-doped MnO2/carbon fiber composite electrode for supercapacitor

Zhong, Hong; Zhu, Hongjie; Gao, Linhui

doi:10.1016/j.jallcom.2015.05.014

Cited by 35 publications

(9 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…28 Also, a owery MnO 2 /graphene complex was prepared using GO and MnSO 4 as the raw material via electrochemical deposition, and in a three-electrode system, the specic capacitance can reach 595.7 F g À1 at the current density of 1 A g À1 . 29 Previously, MnO 2 with different microstructures has been successfully prepared and tested, [30][31][32][33][34][35] and the results show that different structures of the same materials demonstrate different electrochemical properties. Zhu et al 36 reported a core branch heterostructure nano array of a-MnO 2 nanowires and b-MnO 2 ultra-thin nanosheets that combined the mass load of the active substance with enhanced pseudocapacitance.…”

Section: Introductionmentioning

confidence: 99%

Effects of electrodeposition time on a manganese dioxide supercapacitor

Dai

Zhang

et al. 2020

RSC Adv.

View full text Add to dashboard Cite

As is well known that the specific capacitance of supercapacitors cannot be improved by increasing the mass of the deposited MnO 2 films, which means an appropriate deposition duration is important. In this study, nanobelt-structured MnO 2 films were prepared by the electrochemical deposition method under different deposition time to explore the effects of electrodeposition time change on the microstructure and electrochemical properties of this material. Benefiting from the microstructure of the MnO 2 films, the transfer properties of the charged electrons and ions were promoted. Meanwhile, a 3D porous nickel foam was chosen as the deposition substrate, which rendered an enhancement of the MnO 2 conductivity and the mass of the active material. The enhanced specific capacitance and specific surface area attributed to synergistic reactions. Subsequently, the electrochemical performances of the asprepared materials were analyzed via cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) tests. Results show that the optimum sample deposited for 50 s has a specific capacitance of 291.9 F g À1 at the current density of 1 A g À1 and lowest R ct . However, its electrochemical stability cannot come up to the level of the 300 s sample due to the microstructure change.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of electrodeposition time on a manganese dioxide supercapacitor

Dai

Zhang

et al. 2020

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…As we know, carbon fiber exhibits low cost, high tensile strength (5.69 GPa), excellent electrical conductivity (up to 10 6 S m ‐1 ), superior flexibility, and weavability, making it suitable for linear substrates . To date, few efforts have been dedicated to coating or growing electroactive materials on carbon fiber tows (CFTs) and assembling WSSCs . However, the active materials with randomly oriented structure are always stacked on the CFTs .…”

Section: Introductionmentioning

confidence: 99%

Integrated Sustainable Wind Power Harvesting and Ultrahigh Energy Density Wire‐Shaped Supercapacitors Based on Vertically Oriented Nanosheet‐Array‐Coated Carbon Fibers

Shi

Yang

Song

et al. 2017

Advanced Sustainable Systems

View full text Add to dashboard Cite

technologies, such as solar cells, which harvest energy from sunlight, and triboelectric generators, which produce electricity from human motion. Unfortunately, these devices cannot ensure an efficient power supply for energy storage devices due to the intermittency of sunlight and the low current output of triboelectric electricity. [5][6][7] Moreover, the practical applications of solar cells and triboelectric generators are still limited by their high cost and sophisticated fabrication processes.Among the various sustainable energy sources, wind power is of significant importance due to its universal availability and relatively good continuity, since it exists day and night. [8] Wind power can be easily harvested and converted into efficient electricity by using a low cost winddriven generator (WDG). [9,10] Compared with triboelectric electricity, the electricity produced by wind power delivers high output current and voltage. [11] Recently, the development of wind power harvesting in close conjunction with energy storage has attracted a great deal of research interest. Previous works have focused on integrating WDG with supercapacitors (SCs), due to the fast charging-discharging capability and long cycle life of SCs. [12][13][14] Nevertheless, the key in this field is how to develop the SCs with low electrical resistance, which can reduce energy loss to ensure high conversion efficiency of wind power generation, while well-maintaining high energy density to sufficiently store the harvested energy. [13][14][15] Accordingly, it is more desirable to build a windcharging power system by integrating sustainable wind power harvesting and high-performance SCs with low resistance and high energy density.To meet the demand for portable and wearable electronics, wire-shaped SCs (WSSCs) hold great promise owing to their low weight, tiny volume, and high flexibility. [16][17][18][19] Zhi and coworkers rationally fabricated flexible SCs [20] and WSSCs with shape memory function [21,22] for smart energy storage textiles, as well as built self-powered systems by integrating smart SCs with a photodetector and sensor. [23,24] As we know, carbon fiber Wind power harvesting in conjunction with supercapacitors (SCs) has attracted considerable attention. Nevertheless, the bottleneck in this field is how to develop SCs with low electrical resistance and high energy density.Herein, an ingenious strategy to integrate wind power harvesting and asymmetric wire-shaped SCs (WSSCs) has been put forward for the first time. Remarkably, the asymmetric WSSCs are realized by using vertical FeOOH and CoNi 2 S 4 nanosheet-array-coated flexible carbon fibers as negative and positive yarn electrodes, in which a vertically oriented and cross-linked porous network, formed by electroactive nanosheet arrays, facilitates ionic diffusion and charge transport. Benefiting from an intriguing configuration, these asymmetric WSSCs, with superior flexibility and weavability, act as efficient energy storage devices, which exhibit low resistance, high volumetr...

show abstract

“…2 b , the peaks of Mn 2p3/2 (642.2 eV) and Mn 2p1/2 (654.0 eV) can be clearly observed. The difference in peak position is 11.8 eV [23, 24], indicating a valence state of +4.…”

Section: Resultsmentioning

confidence: 99%

Microwave‐assisted synthesis of CuO/MnO ₂ nanocomposites for supercapacitor application

Zhang

2020

Micro & Nano Letters

View full text Add to dashboard Cite

Boron-doped MnO2/carbon fiber composite electrode for supercapacitor

Cited by 35 publications

References 34 publications

Effects of electrodeposition time on a manganese dioxide supercapacitor

Effects of electrodeposition time on a manganese dioxide supercapacitor

Integrated Sustainable Wind Power Harvesting and Ultrahigh Energy Density Wire‐Shaped Supercapacitors Based on Vertically Oriented Nanosheet‐Array‐Coated Carbon Fibers

Microwave‐assisted synthesis of CuO/MnO ₂ nanocomposites for supercapacitor application

Contact Info

Product

Resources

About

Boron-doped MnO2/carbon fiber composite electrode for supercapacitor

Cited by 35 publications

References 34 publications

Effects of electrodeposition time on a manganese dioxide supercapacitor

Effects of electrodeposition time on a manganese dioxide supercapacitor

Integrated Sustainable Wind Power Harvesting and Ultrahigh Energy Density Wire‐Shaped Supercapacitors Based on Vertically Oriented Nanosheet‐Array‐Coated Carbon Fibers

Microwave‐assisted synthesis of CuO/MnO 2 nanocomposites for supercapacitor application

Contact Info

Product

Resources

About

Microwave‐assisted synthesis of CuO/MnO ₂ nanocomposites for supercapacitor application