Hierarchical “tube-on-fiber” carbon/mixed-metal selenide nanostructures for high-performance hybrid supercapacitors

Lv, Liping; Zhi, Chuanwei; Gao, Yun; Yin, Xiaobin; Hu, Yiyang; Crespy, Daniel; Wang, Yong

doi:10.1039/c9nr03088c

Cited by 68 publications

(35 citation statements)

References 65 publications

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“…Selected area electron diffraction (SAED) patterns reveal excellent crystallinity and unique hexagonal structure of single-layer Ti 3 C 2 T x MXene [ 34 ]. Then, ZIF-67 nanocubes were prepared through a conventional co-precipitation method at ambient temperature [ 35 ]. SEM images of ZIF-67 (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Dimensional Gradient Structure of CoSe2@CNTs–MXene Anode Assisted by Ether for High-Capacity, Stable Sodium Storage

Quan

et al. 2021

Nano-Micro Lett.

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Recently, abundant resources, low-cost sodium-ion batteries are deemed to the new-generation battery in the field of large-scale energy storage. Nevertheless, poor active reaction dynamics, dissolution of intermediates and electrolyte matching problems are significant challenges that need to be solved. Herein, dimensional gradient structure of sheet–tube–dots is constructed with CoSe2@CNTs–MXene. Gradient structure is conducive to fast migration of electrons and ions with the association of ether electrolyte. For half-cell, CoSe2@CNTs–MXene exhibits high initial coulomb efficiency (81.7%) and excellent cycling performance (400 mAh g−1 cycling for 200 times in 2 A g−1). Phase transformation pathway from crystalline CoSe2–Na2Se with Co and then amorphous CoSe2 in the discharge/charge process is also explored by in situ X-ray diffraction. Density functional theory study discloses the CoSe2@CNTs–MXene in ether electrolyte system which contributes to stable sodium storage performance owing to the strong adsorption force from hierarchical structure and weak interaction between electrolyte and electrode interface. For full cell, CoSe2@CNTs–MXene//Na3V2 (PO4)3/C full battery can also afford a competitively reversible capacity of 280 mAh g−1 over 50 cycles. Concisely, profiting from dimensional gradient structure and matched electrolyte of CoSe2@CNTs–MXene hold great application potential for stable sodium storage.

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Section: Resultsmentioning

confidence: 99%

“…Peaks at 778.4 and 793.7 eV can be corresponded to the Co–O bond due to the surface oxidization of CoSe 2 [ 38 ]. Owing to the orbital between Co atoms and Se atoms, two satellite peaks also can be found in the spectrogram [ 35 ]. The Se 3d spectra (Fig.…”

Section: Resultsmentioning

confidence: 99%

Dimensional Gradient Structure of CoSe2@CNTs–MXene Anode Assisted by Ether for High-Capacity, Stable Sodium Storage

Quan

et al. 2021

Nano-Micro Lett.

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“…1 M KOH was used as the electrolyte in both the two-and threeelectrode systems. The specific capacitance, ED, and PD were gained using eqs 1−3, respectively 1,16…”

Section: Methodsmentioning

confidence: 99%

“…The specific capacitance, ED, and PD were gained using eqs –, respectively , C , I , Δ t , m , Δ V , ED, and PD symbolize the mass specific capacitance (F g –1 ), the current used in the discharge process (A), time (s), the active material mass (g), scanning voltage range (V), ED (W h kg –1 ), and PD (W kg –1 ), respectively.…”

Section: Experimental Sectionmentioning

confidence: 99%

“…Environmental problems and energy crisis caused by the utilization of traditional fossil energy are becoming more and more serious, leading to an urgent need toward clean and renewable energy such as rechargeable batteries and electrochemical capacitors (ECs). − Supercapacitors (SCs), as a type of device between traditional ECs and rechargeable batteries, show a large market growth toward sustainable energy storage. , According to the mechanism of energy storage, there are two main types of SCs: (a) the faradaic pseudocapacitor that achieves charge storage through redox or Faraday reactions between electrolytes and electrode materials and (b) electrochemical double-layer capacitors (EDLCs) that physically accumulate charges at the surface/superficial surface of electrodes, typically carbon-based SCs (CSCs). CSCs with excellent cycling stability are good candidates for energy storage configurations but still face challenges of poor capacitance and low energy density (ED), which restrains their spread in practical application.…”

Section: Introductionmentioning

confidence: 99%

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Fluorine/Nitrogen Co-Doped Porous Carbons Derived from Covalent Triazine Frameworks for High-Performance Supercapacitors

Gao

Cui

Liu

et al. 2021

ACS Appl. Energy Mater.

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Porous carbon materials with a synergistically large specific surface area (S BET ) and an adjustable structure are urgently needed to meet the demands of high-performance supercapacitors (SCs) and other electrochemical devices. Although numerous studies have been dedicated to designing multifunctional porous carbons, most of them still have shown hard-control doping sites and unclear structures. Herein, we prepare a series of structurecontrolled F/N co-doped porous carbons (FNCs) with large S BET via an in situ doping process based on F-and N-rich covalent triazine-based frameworks (FCTFs) as precursors. The as-prepared high-F/N-containing FNC-700 with a large S BET (∼1849.1 m 2 g −1 ) as the aqueous-based SC electrode achieves a specific capacitance (C s ) of 326 F g −1 at 1 A g −1 , remarkable cyclability with negligible capacitance decay after 10,000 cycles in three-electrode systems, and a maximum energy density of 31.4 Wh kg −1 in twoelectrode systems. This study has an insightful hint in exploring multifunctional heteroatom-doped carbons by the in situ doping process.

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Emerging Trends of Nanofibrous Piezoelectric and Triboelectric Applications: Mechanisms, Electroactive Materials, and Designed Architectures

Zhi,

Shi,

et al. 2024

Advanced Materials

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Over the past few decades, significant progress in piezo‐/tribo‐electric nanogenerators (PTEGs) has led to the development of cutting‐edge wearable technologies. Nanofibers with good designability, controllable morphologies, large specific areas, and unique physicochemical properties provide a promising platform for PTEGs for various advanced applications. However, the further development of nanofiber‐based PTEGs is limited by technical difficulties, ranging from materials design to device integration. Herein, we systematically review the current developments in PTEGs based on electrospun nanofibers. The review begins with the mechanisms of PTEGs and the advantages of nanofibers and nanodevices, including high breathability, waterproofness, scalability, and thermal–moisture comfort. In terms of materials and structural design, novel electroactive nanofibers and structure assemblies based on one‐dimensional micro/nanostructures, two‐dimensional bionic structures, and three‐dimensional multilayered structures are discussed. Subsequently, nanofibrous PTEGs in applications such as energy harvesters, personalized medicine, personal protective equipment, and human‐machine interactions are summarized. Nanofiber‐based PTEGs still face many challenges such as energy efficiency, material durability, device stability, and device integration. In the final section of this review, the research gap between research and practical applications of PTEGs is discussed, and emerging trends are proposed, providing some ideas for the development of intelligent wearables.This article is protected by copyright. All rights reserved

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Hierarchical “tube-on-fiber” carbon/mixed-metal selenide nanostructures for high-performance hybrid supercapacitors

Abstract: Hierarchical “tube-on-fiber” carbon/mixed-metal selenide nanostructures (Co–Zn–Se@CNTs–CNFs) are constructed and exhibit high performance for hybrid supercapacitors.

Cited by 68 publications

References 65 publications

Dimensional Gradient Structure of CoSe2@CNTs–MXene Anode Assisted by Ether for High-Capacity, Stable Sodium Storage

Dimensional Gradient Structure of CoSe2@CNTs–MXene Anode Assisted by Ether for High-Capacity, Stable Sodium Storage

Fluorine/Nitrogen Co-Doped Porous Carbons Derived from Covalent Triazine Frameworks for High-Performance Supercapacitors

Emerging Trends of Nanofibrous Piezoelectric and Triboelectric Applications: Mechanisms, Electroactive Materials, and Designed Architectures

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