Villiform carbon fiber paper as current collector for capacitive deionization devices with high areal electrosorption capacity

Kong, Weiqing; Wang, Gang; Zhang, Meng; Duan, Xidong; Hu, Jiawen; Duan, Xiangfeng

doi:10.1016/j.desal.2019.02.016

Cited by 33 publications

(11 citation statements)

References 40 publications

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“…Similarly, Duan's group reported a PCF paper prepared via thermal annealing and subsequent O 2 plasma etching of the commercial pristine carbon fiber paper. 148 The resulting PCFs had a highly porous, roughened surface with many open mesopores. Zhao et al successfully produced PCFs by utilizing the mechanism that the uniformly deposited ZnO on the surface of CFs via hydrothermal treatment can be reduced into Zn and the metal Zn can evaporate by carbothermic reaction at a desirable temperature (Fig.…”

Section: Fabrication Of Pcfs With Different Porous Structuresmentioning

confidence: 99%

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Liu

Kang

et al. 2022

J. Mater. Chem. A

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Section: Fabrication Of Pcfs With Different Porous Structuresmentioning

confidence: 99%

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Liu

Kang

et al. 2022

J. Mater. Chem. A

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“…Figure f shows two characteristic peaks at ∼1336 cm –1 (D band) and 1578 cm –1 (G band), which correspond to the structural defects and the crystalline graphite, respectively. The intensity ratio of D band to G band ( I D / I G ) can be used for evaluating the defect degree in carbon-based materials . So, the increased I D / I G value from 0.79 for NC to 0.88 for BNC indicates that further introducing heteroatoms (i.e., B atoms) into the carbon matrix could increase the number of defective sites.…”

Section: Resultsmentioning

confidence: 99%

Ultrahigh Content Boron and Nitrogen Codoped Hierarchically Porous Carbon Obtained from Biomass Byproduct Okara for Capacitive Deionization

Kong

Zhang

et al. 2022

ACS Omega

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Capacitive deionization (CDI) is an environmentally friendly, energy efficient, and low cost water purification technique in comparison with other conventional techniques, and it has attracted considerable attention in recent years. Here, we use biomass byproduct okara as the starting material to fabricate a boron and nitrogen codoped hierarchically porous carbon (BNC) with ultrahigh heteroatom contents and abundant in-plane nanoholes for CDI application. With the interconnected hierarchical porous structure, the BNC not only exhibits a large surface area (647.0 m3 g–1) for the adsorption of ions but also offers abundant ion transport channels to access the entire internal surface. Meanwhile, the ultrahigh dopants’ content of B (11.9 at%) and N (14.8 at%) further gives rise to the increased surface polarity and enhanced capacitance for BNC. Owing to these favorable properties, BNC exhibits top-level salt adsorption capacity (21.5 mg g–1) and charge efficiency (59.5%) at the initial NaCl concentration of ∼500 mg L–1. Moreover, we performed first-principle simulations to explore the different effects between N-doping and N,B-codoping on the capacitive property, which indicate that the boron and nitrogen codoping of carbon can largely increase the quantum capacitance over the double layer capacitance. The results of this work suggest a promising prospect for the BNC material in practical CDI application.

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“…[ 32 ] In addition, Raman spectra of the HPCNFs and the HPSbCNFs‐700 in Figure 2b exhibit two characteristic peaks at 1347 and 1591 cm −1 , corresponding to the D band (from disordered sp 3 hybrided C atoms) and G band (from ordered sp 2 hybrided C atoms) of carbon materials, respectively. [ 35–37 ] The intensity ratio of the G and D bands ( I G / I D ) is 1.02 for HPCNFs and 1.01 for HPSbCNFs‐700, implying high graphitization degree for both HPCNFs and HPSbCNFs‐700. [ 38 ] To evaluate the content of Sb in the obtained HPSbCNFs‐700, thermogravimetric analysis (TGA) was carried out in air from room temperature to 800 °C (Figure 2c).…”

Section: Resultsmentioning

confidence: 99%

A High Capacity and Working Voltage Potassium‐Based Dual Ion Batteries

Zhang

Zhong

Kong

et al. 2020

Energy & Environ Materials

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Potassium‐based dual ion batteries (KDIBs) have attracted significant attention owing to high working voltage, high safety, low processing cost, and environmental friendliness. Nevertheless, one great challenge for practical KDIBs is to develop suitable anode materials with high specific capacity. Herein, we report an architecture of hierarchically porous antimony nanoparticles/carbon nanofibers (HPSbCNFs) as flexible, free‐standing anode for high‐performance KDIBs. The HPSbCNFs with hierarchically porous structure, and high‐content nitrogen doping, not only offer sufficient free space to tolerate the repetitive volume expansion of Sb nanoparticles during long‐term cycling, but also greatly facilitate the transport of electrons and ions within electrode, ensuring high material utilization ratio. Thus, the KDIBs, constituted by HPSbCNFs‐700 (calcined at 700 °C) anode and graphite cathode, exhibited a high reversible capacity of 440 mAh g−1 with high discharge medium voltage of 4.5 V at a specific current of 200 mA g−1 (the highest capacity for all KDIBs normalized by the mass of the anode), and excellent cyclic life. Outstanding electrochemical reversibility of the KDIBs was further demonstrated by ex situ XRD, ex situ Raman spectrum, and HRTEM. These results suggest the as‐designed HPSbCNFs‐700 with high‐capacity and long‐term cycling stability is a promising anode material for high‐performance KDIBs.

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Villiform carbon fiber paper as current collector for capacitive deionization devices with high areal electrosorption capacity

Cited by 33 publications

References 40 publications

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Ultrahigh Content Boron and Nitrogen Codoped Hierarchically Porous Carbon Obtained from Biomass Byproduct Okara for Capacitive Deionization

A High Capacity and Working Voltage Potassium‐Based Dual Ion Batteries

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