scholarly journals Modified Carbon Fiber Paper-Based Electrodes Wrapped by Conducting Polymers with Enhanced Electrochemical Performance for Supercapacitors

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1072 ◽  
Author(s):  
Sicong Tan ◽  
Jiajia Li ◽  
Lijie Zhou ◽  
Peng Chen ◽  
Jiangtao Shi ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Electrochemical Performance ◽  
Active Sites ◽  
Low Cost ◽  
Cellulose Nanofibers ◽  
Three Dimensional ◽  
Rate Capability ◽  
High Rate ◽  
Vacuum Filtration ◽  
Carbon Fiber Paper

An easy approach to fabricating carbon fiber paper (CFP) based electrodes has been developed. This method can be mainly divided into two steps, for which the mixture of cellulose nanofibers (CNFs) and carbon nanotubes (CNTs) was first deposited on the surface of carbon fiber paper through a vacuum filtration device followed by immersing the hybrid paper into concentrated aniline solution to polymerize polyaniline (PANI). Compared to carbon fiber paper, the acid-treated carbon fiber paper (A-CFP)-based electrode provides more active sites, which are beneficial for the polymerization of polyaniline. The mixture of CNFs and CNTs could coat on the A-CFP by vacuum-filtration due to the high hydrophilicity of A-CFP improved by acid-treatment. PANI with different polymerization time was in-situ synthesized on the surface of the hybrid paper to form a three-dimensional cross-linked structure that greatly enhanced the electrochemical performance of the electrode by improving high capacitance, high rate-capability, and long cycle-life. Moreover, the assembled symmetrical supercapacitor showed a high area capacitance of 626 mF·cm−2 and an energy density of 87 µWh·cm−2. This facile, easy performed, and low-cost strategy may provide a feasible method for the production of supercapacitor electrodes.

Hierarchical core/shell structure of MnO2@polyaniline composites grown on carbon fiber paper for application in pseudocapacitors

2015 ◽  
Vol 17 (44) ◽  
pp. 29874-29879 ◽  
Author(s):  
MinHo Yang ◽  
Seok Bok Hong ◽  
Bong Gill Choi
Keyword(s):  
Carbon Fiber ◽  
Shell Structure ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
High Rate ◽  
Core Shell ◽  
High Rate Capability ◽  
Carbon Fiber Paper ◽  
Core Shell Structure ◽  
Polyaniline Composites

Hierarchical core/shell structured arrays of MnO2@polyaniline nanosheets synthesized on the surface of carbon fiber paper, showed high specific capacitance, high rate capability, and good cycle life.

scholarly journals Enhanced catalytic ozonation of ibuprofen using a 3D structured catalyst with MnO2 nanosheets on carbon microfibers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Guhankumar Ponnusamy ◽  
Hajar Farzaneh ◽  
Yongfeng Tong ◽  
Jenny Lawler ◽  
Zhaoyang Liu ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Active Sites ◽  
Low Cost ◽  
Three Dimensional ◽  
Industrial Applications ◽  
Catalytic Ozonation ◽  
Heterogeneous Catalytic ◽  
Structured Catalyst ◽  
Dimensional Network ◽  
Carbon Microfibers

AbstractHeterogeneous catalytic ozonation is an effective approach to degrade refractory organic pollutants in water. However, ozonation catalysts with combined merits of high activity, good reusability and low cost for practical industrial applications are still rare. This study aims to develop an efficient, stable and economic ozonation catalyst for the degradation of Ibuprofen, a pharmaceutical compound frequently detected as a refractory pollutant in treated wastewaters. The novel three-dimensional network-structured catalyst, comprising of δ-MnO2 nanosheets grown on woven carbon microfibers (MnO2 nanosheets/carbon microfiber), was synthesized via a facile hydrothermal approach. Catalytic ozonation performance of Ibuprofen removal in water using the new catalyst proves a significant enhancement, where Ibuprofen removal efficiency of close to 90% was achieved with a catalyst loading of 1% (w/v). In contrast, conventional ozonation was only able to achieve 65% removal efficiency under the same operating condition. The enhanced performance with the new catalyst could be attributed to its significantly increased available surface active sites and improved mass transfer of reaction media, as a result of the special surface and structure properties of this new three-dimensional network-structured catalyst. Moreover, the new catalyst displays excellent stability and reusability for ibuprofen degradation over successive reaction cycles. The facile synthesis method and low-cost materials render the new catalyst high potential for industrial scaling up. With the combined advantages of high efficiency, high stability, and low cost, this study sheds new light for industrial applications of ozonation catalysts.

ZnCl2 regulate flax-based porous carbon fiber for long cycle stability supercapacitors

2021 ◽  
Author(s):  
Gaigai Duan ◽  
Luying Zhao ◽  
Lian Chen ◽  
Feng Wang ◽  
Shuijian He ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Electrochemical Performance ◽  
Porous Carbon ◽  
Low Cost ◽  
Flax Fiber ◽  
Cycle Stability ◽  
Long Cycle

The flax fiber with abundant sources and low cost is an excellent precursor of carbon fiber for supercapacitor. At present, it is very attractive designing high electrochemical performance electrode via...

Highly ordered nanoscale phosphomolybdate-grafted polyaniline/metal hybrid layered structures prepared via secondary sputtering phenomenon as high-performance pseudocapacitor electrodes

2021 ◽  
Author(s):  
Eun Seop Yoon ◽  
Bong Gill Choi ◽  
Hwan-Jin Jeon
Keyword(s):  
Electron Transfer ◽  
Aspect Ratio ◽  
Electrochemical Performance ◽  
High Aspect Ratio ◽  
High Performance ◽  
Electrode Materials ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
High Rate ◽  
Large Area

Abstract The development of energy storage electrode materials is important for enhancing the electrochemical performance of supercapacitors. Despite extensive research on improving electrochemical performance with polymer-based materials, electrode materials with micro/nanostructures are needed for fast and efficient ion and electron transfer. In this work, highly ordered phosphomolybdate (PMoO)-grafted polyaniline (PMoO-PAI) deposited onto Au hole-cylinder nanopillar arrays is developed for high-performance pseudocapacitors. The three-dimensional nanostructured arrays are easily fabricated by secondary sputtering lithography, which has recently gained attention and features a high resolution of 10 nm, a high aspect ratio greater than 20, excellent uniformity/accuracy/precision, and compatibility with large area substrates. These 10nm scale Au nanostructures with a high aspect ratio of ~30 on Au substrates facilitate efficient ion and electron transfer. The resultant PMoO-PAI electrode exhibits outstanding electrochemical performance, including a high specific capacitance of 114 mF/cm2, a high-rate capability of 88%, and excellent long-term stability.

Three-dimensional graphene encapsulated hollow CoSe2-SnSe2 nanoboxes for high performance asymmetric supercapacitors

2022 ◽  
Author(s):  
Kainan Li ◽  
Ke Zheng ◽  
Zhifang Zhang ◽  
Kuan Li ◽  
Ziyao Bian ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Active Sites ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Hollow Structure ◽  
Large Specific Surface Area ◽  
Composite Aerogel

Abstract Construction of metal selenides with a large specific surface area and a hollow structure is one of the effective methods to improve the electrochemical performance of supercapacitors. However, the nano-material easily agglomerates due to the lack of support, resulting in the loss of electrochemical performance. Herein, we successfully design a three-dimensional graphene (3DG) encapsulation-protected hollow nanoboxes (CoSe2-SnSe2) composite aerogel (3DG/CoSe2-SnSe2) via a co-precipitation method coupled with self-assembly route, followed by a high temperature selenidation strategy. The obtained aerogel possesses porous 3DG conductive network, large specific surface area and plenty of reactive active sites. It could be used as a flexible and binder-free electrode after a facile mechanical compression process, which provided a high specific capacitance of 460 F g-1 at 0.5 A g-1, good rate capability of 212.7 F g-1 at 10 A g-1, and excellent cycle stability due to the fast electron/ion transfer and electrolyte diffusion. With the as-prepared 3DG/CoSe2-SnSe2 as positive electrodes and the AC (activated carbon) as negative electrodes, an asymmetric supercapacitor (3DG/CoSe2-SnSe2//AC) was fabricated, which delivered a high specific capacity of 38 F g-1 at 1A g-1 and an energy density of 11.89 W h kg-1 at 749.9 W kg-1, as well as a capacitance retention of 91.1% after 3000 cycles. This work provides a new method for preparing electrode material.

A simple, repeatable and highly stable self-powered solar-blind photoelectrochemical-type photodetector using amorphous Ga2O3 films grown on 3D carbon fiber paper

2021 ◽  
Author(s):  
Lijuan Huang ◽  
Zhengrui Hu ◽  
Hong Zhang ◽  
Yuanqiang Xiong ◽  
Shiqiang Fan ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Gallium Oxide ◽  
Three Dimensional ◽  
Next Generation ◽  
Solar Blind ◽  
Carbon Fiber Paper ◽  
Deep Ultraviolet ◽  
Self Powered ◽  
Ultraviolet Photodetectors

Gallium oxide (Ga2O3) has been extensively studied in recent years because it is a natural candidate material for next-generation solar-blind deep ultraviolet photodetectors (PDs). Herein, a three dimensional (3D) amorphous...

3D self-assembled VS4 microspheres with high pseudocapacitance as highly efficient anodes for Na-ion batteries

Nanoscale ◽  
2018 ◽  
Vol 10 (46) ◽  
pp. 21671-21680 ◽  
Author(s):  
Wenbin Li ◽  
Jianfeng Huang ◽  
Liangliang Feng ◽  
Liyun Cao ◽  
Shuwei He
Keyword(s):  
Active Sites ◽  
High Capacity ◽  
Rate Capability ◽  
High Rate ◽  
High Rate Capability ◽  
Highly Efficient ◽  
Pseudocapacitive Behavior ◽  
Surface Active ◽  
Self Assembled ◽  
Cycling Life

The decreasing crystallinity of VS4 microspheres greatly increases the surface active sites, and then promotes the pseudocapacitive behavior, and finally leads to the high capacity, long cycling life and high rate capability.

Three-Dimensional MoS2/Graphene Hybrid Aerogel as Free-Standing, High-Performance Electrode for Supercapacitor

NANO ◽  
2020 ◽  
Vol 15 (05) ◽  
pp. 2050062
Author(s):  
Zhaolei Meng ◽  
Xiaojian He ◽  
Song Han ◽  
Zijian Hu
Keyword(s):  
Porous Structure ◽  
Surface Area ◽  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Hydrothermal Process ◽  
Three Dimensional ◽  
Rate Capability ◽  
Free Standing ◽  
Hybrid Aerogel

Carbon materials are generally employed as supercapacitor electrodes due to their low- cost, high-chemical stability and environmental friendliness. However, the design of carbon structures with large surface area and controllable porous structure remains a daunt challenge. In this work, a three-dimensional (3D) hybrid aerogel with different contents of MoS2 nanosheets in 3D graphene aerogel (MoS2-GA) was synthesized through a facial hydrothermal process. The influences of MoS2 content on microstructure and subsequently on electrochemical properties of MoS2-GA are systematically investigated and an optimized mass ratio with MoS2: GA of 1:2 is chosen to achieve high mechanical robustness and outstanding electrochemical performance in the hybrid structure. Due to the large specific surface area, porous structure and continuous charge transfer network, such MoS2-GA electrodes exhibit high specific capacitance, good rate capability and excellent cyclic stability, showing great potential in large-scale and low-cost fabrication of high-performance supercapacitors.

Sodiation vs. lithiation phase transformations in a high rate – high stability SnO2 in carbon nanocomposite

2015 ◽  
Vol 3 (13) ◽  
pp. 7100-7111 ◽  
Author(s):  
Jia Ding ◽  
Zhi Li ◽  
Huanlei Wang ◽  
Kai Cui ◽  
Alireza Kohandehghan ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Self Assembly ◽  
High Stability ◽  
Rate Capability ◽  
High Rate ◽  
Li Ion Battery ◽  
Assembly Method ◽  
Li Ion ◽  
Carbon Nanocomposite ◽  
Battery Anode

An SnO2-carbon nanocomposite was created by a self-assembly method. This showed promising electrochemical performance as both a Na and Li ion battery anode, with among the best cyclability and rate capability when tested against Na.

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