A freestanding CNTs film fabricated by pyrrole-modified CVD for capacitive deionization

Song, Dan; Guo, Wenlei; Zhang, Tao; Lu, Pengyi; Guo, Anran; Hou, Feng; Yan, Xiao; Liang, Ji

doi:10.1680/jsuin.18.00036

Cited by 20 publications

(11 citation statements)

References 37 publications

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“…The elemental mapping of the materials (Figure 3D and Figures S9, S10) reveals the uniform distribution of carbon, boron, and oxygen over the whole material. The absence of nitrogen indicates that pyridine only participated in the CNTs formation process and changed the morphology of CNTs, but did not cause N-doping in the CNTs, which is also in agreement with the EDS results and has been observed in our previous studies (Song et al, 2019). The chemical states of the elements in py-B-CNTs and other materials were further characterized by XPS survey spectrums (Figures S11–S14).…”

Section: Resultssupporting

confidence: 92%

“…The morphology and microstructure of the materials were firstly characterized by SEM and TEM, as shown in Figure 2. On the pristine CNTs film, except for a few clusters, which are typically composed of amorphous carbon (Song et al, 2019) and short crinkly tubes (circled in Figure 2A), the majority of the material are intertwined bunches of long and smooth CNTs (inset of Figure 2A). Under TEM, these long tubes are found to be few-walled CNTs with diameters of 6–8 nm (Figure S3) and the crinkly tubes are multi-walled with a diameter of ~20 nm as well as an average interlayer distance of 0.34 nm, typical of the graphitic structure (Figures 2B,C and Figure S4).…”

Section: Resultsmentioning

confidence: 99%

“…The materials' chemical composition was then studied by energy dispersive spectroscopy (Figure 3D and Table S1), and it was measured that content of B, C, O, Fe was 11.47, 85.28, 2.91, and 0.34 at.%, respectively, for py-B-CNTs film and no nitrogen was detected. For other materials, py-CNTs possessed higher O content of 5.66 at.% than B-CNTs (0.90 at.%) and CNTs (1.16 at.%), attributed to the easier oxygen adsorption on the defect sites (Yang et al, 2011; Song et al, 2019). The elemental mapping of the materials (Figure 3D and Figures S9, S10) reveals the uniform distribution of carbon, boron, and oxygen over the whole material.…”

Section: Resultsmentioning

confidence: 99%

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A Flexible and Boron-Doped Carbon Nanotube Film for High-Performance Li Storage

Wang

Guo

et al. 2019

Front. Chem.

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Boron-doped carbon nanotubes are a promising candidate for Li storage due to the unique electronic structure and high crystallinity brought by the boron dopants. However, the relatively low Li storage capacity has limited its application in the electrochemical energy storage field, which is mainly caused by the predominantly intact graphitic structure on their surface with limited access points for Li ion entering. Herein, we report a novel B-doped CNTs (py-B-CNTs) film, in which the CNTs possess intrinsically rough surface but flat internal graphitic structure. When used as a flexible anode material for LIBs, this py-B-CNTs film delivers significantly enhanced capacity than the conventional B-doped CNTs or the pristine CNTs films, with good rate capability and excellent cycling performance as well. Moreover, this flexible film also possesses excellent mechanical flexibility, making it capable of being used in a prototype flexible LIB with stable power output upon various bending states.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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A Flexible and Boron-Doped Carbon Nanotube Film for High-Performance Li Storage

Wang

Guo

et al. 2019

Front. Chem.

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“…In particular, for the synthesis of CNT‐based, binder‐free electrode, floating catalyst chemical vapor deposition (FCCVD) system with a vertical reaction chamber has been the focus recently. FCCVD is inexpensive and scalable, and can well control the morphology of CNTs or bundles in the thin film, [37] which is regarded as a potential method for high‐yield production of CNT with high purity [38–40] . Figure 4a shows a typical FCCVD system for CNT synthesis [39] .…”

Section: Synthesis Of Binder‐free Electrodes and Their Electrochemical Energy Storage Applicationsmentioning

confidence: 99%

Recent Progress in Binder‐Free Electrodes Synthesis for Electrochemical Energy Storage Application

Shen

Zhai

Wang

et al. 2021

Batteries & Supercaps

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Fabrication of binder‐free electrodes is an effective way to increase the performance of electrochemical energy storage (EES) devices, such as rechargeable batteries and supercapacitors. In traditional electrodes, the binder is usually electrochemically inert and has weak interactions and interfaces between binder and the active material, which increase “dead mass” and directly affect the performance of energy storage system. The binder‐free electrode can provide well‐designed electrode material structure enables well connection between active materials themselves and current collectors. In addition, without insulating binder, electron and electrolyte ions can transfer more efficiently within the electrode materials. Here, we reviewed research efforts in using various techniques involving chemical, physical and electrical methods to fabricate binder‐free electrodes. For every technique, we first briefly describe their principle and involved factors that influence the performance of as‐fabricated binder‐free electrodes and summarize advantages and disadvantages. Next, we reviewed several works which have used this technique to fabricate binder‐free electrodes. Further, the effect of well‐crafted structure design on the properties of energy storage performances including rate capability, and cycle stability was highlighted. Last, we offer our perspectives on the challenges and potential future research directions in this area. We hope this review can stimulate more research to design and synthesize the binder‐free materials for EES devices.

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“…Amongst, carbon materials are the most popular candidates to construct efficient bifunctional oxygen catalysts for ZABs, due to their high electrical conductivity, high chemical stability, versatile porous nanostructure, tunable physical and chemical properties, and low cost . Remarkably, the electronic structure of carbon materials can be facilely modified via multiple regulation strategies (e. g., heteroatom doping, defect engineering, surface engineering, etc .)…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Carbon‐Based Bifunctional Oxygen Catalysts for Zinc‐Air Batteries

Liu

Tong

Yan

et al. 2019

Batteries & Supercaps

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125

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air batteries (ZABs) have recently received tremendous research attention due to their high theoretical energy densities. However, current ZABs suffer from poor energy efficiency and cyclability, mainly owing to the sluggish kinetics of the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) on the air electrode. Therefore, rational design of efficient bifunctional oxygen electrocatalysts with high activity and stability is essential for improving battery performance. Carbon-based nanomaterials are promising candidates for bifunctional oxygen catalysis. In this review, we present the latest development of carbon-based bifunctional electrocatalysts for ZABs. Firstly, the related reaction mechanisms of bifunctional ORR/OER catalysts are introduced. Then, the recent advances in developing carbon-based bifunctional catalysts with tailored structure and promising catalytic performance are introduced following the regulation strategies, e. g., heteroatom doping, defect engineering, and/or hybridizing with other active materials. Finally, the key challenges and perspectives of advanced ZABs are provided to better shed light on future research. . This review aims to provide timely information of the carbon-based bifunctional oxygen catalysts for researchers and to shed light on the future development of high-performance catalysts and ZABs. 2 3 4 5 6 7 8

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A freestanding CNTs film fabricated by pyrrole-modified CVD for capacitive deionization

Cited by 20 publications

References 37 publications

A Flexible and Boron-Doped Carbon Nanotube Film for High-Performance Li Storage

A Flexible and Boron-Doped Carbon Nanotube Film for High-Performance Li Storage

Recent Progress in Binder‐Free Electrodes Synthesis for Electrochemical Energy Storage Application

Recent Advances in Carbon‐Based Bifunctional Oxygen Catalysts for Zinc‐Air Batteries

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