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Journal ArticleDOI

A Novel Triple Crosslinking Strategy on Carbon Nanofiber Membranes as Flexible Electrodes for Lithium-Ion Batteries

28 Aug 2022-Polymers-Vol. 14, Iss: 17, pp 3528-3528
TL;DR: In this article , a triple crosslinking strategy, including pre-rolling, solvent and chemical imidization cross-linking, was proposed to solve the problem of low electrical conductivity of carbon nanofiber membranes.
Abstract: In order to solve the problem of low electrical conductivity of carbon nanofiber membranes, a novel triple crosslinking strategy, including pre-rolling, solvent and chemical imidization crosslinking, was proposed to prepare carbon nanofiber membranes with a chemical crosslinking structure (CNMs-CC) derived from electrospinning polyimide nanofiber membranes. The physical-chemical characteristics of CNMs-CC as freestanding anodes for lithium-ion batteries were investigated in detail, along with carbon nanofiber membranes without a crosslinking structure (CNMs) and carbon nanofiber membranes with a physical crosslinking structure (CNMs-PC) as references. Further investigation demonstrates that CNMs-CC exhibits excellent rate performance and long cycle stability, compared with CNMs and CNMs-PC. At 50 mA g−1, CNMs-CC delivers a reversible specific capacity of 495 mAh g−1. In particular, the specific capacity of CNMs-CC is still as high as 290.87 mAh g−1 and maintains 201.38 mAh g−1 after 1000 cycles at a high current density of 1 A g−1. The excellent electrochemical performance of the CNMs-CC is attributed to the unique crosslinking structure derived from the novel triple crosslinking strategy, which imparts fast electron transfer and ion diffusion kinetics, as well as a stable structure that withstands repeated impacts of ions during charging and discharging process. Therefore, CNMs-CC shows great potential to be the freestanding electrodes applied in the field of flexible lithium-ion batteries and supercapacitors owing to the optimized structure strategy and improved properties.

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TL;DR: In this article , a cross-linked composite polymer electrolyte (CCPE) was prepared with PEO, LiClO4 salt, greener nanofiller, and cross-linking monomers via the facile ultraviolet (UV) polymerization technique.
Abstract: The next-generation electric vehicle requires superior safety and high-energy-density batteries for better performance. Currently, solid polymer electrolytes provide better safety, high mechanical stability, and a desirable electrode-to-electrolyte interface in lithium-ion batteries compared to those in conventional battery systems. However, the ionic conductivity of solid-state electrolytes remains challenging at room and low operating temperatures. Herein, we report that incorporating a greener calcium hydroxide (CH) based nanofiller derived from natural waste seashells with polymer electrolyte gives a tremendously increased lithium-ion conductivity of 4.12 × 10–5 S cm–1 at 25 °C. The cross-linked composite polymer electrolyte (CCPE) was prepared with PEO, LiClO4 salt, greener nanofiller, and cross-linking monomers via the facile ultraviolet (UV) polymerization technique. The photosensitive vinyl groups of diacrylate and the thio groups of the tetrathiol monomer undergo a thiol–ene click reaction to form a highly cross-linked network with homogeneously distributed LiClO4 and CH nanofiller. The incorporation of 15 wt % of CH greener nanofiller significantly improved the amorphous phase of the composite electrolyte and showed a wide electrochemical window of 5 V. The fine porous structure of CH greener nanofiller incorporated in the solid-state cross-linked network electrolyte channelizes for smooth lithium-ion mobility. The fabricated full cell exhibits good discharge capacity, of 160 mAh g–1 to 150 mAh g–1 at 0.1 C over 50 cycles with a high Coulombic efficiency of 95 % at 60 °C. Naturally derived, cost-effective greener nanofiller from waste seashells acts as a prominent additive to prepare solid-state electrolytes with high stability in lithium metal batteries.
References
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Journal ArticleDOI
TL;DR: In this paper, the authors summarized the recent research progress of flexible lithium-ion batteries, with special emphasis on electrode material selectivity and battery structural design, and discussed the prospects and challenges toward the practical uses of flexible batteries in electronic devices.
Abstract: With the advent of flexible electronics, flexible lithium-ion batteries have attracted great attention as a promising power source in the emerging field of flexible and wearable electronic devices such as roll-up displays, touch screens, conformable active radio-frequency identification tags, wearable sensors and implantable medical devices. In this review, we summarize the recent research progress of flexible lithium-ion batteries, with special emphasis on electrode material selectivity and battery structural design. We begin with a brief introduction of flexible lithium-ion batteries and the current development of flexible solid-state electrolytes for applications in this field. This is followed by a detailed overview of the recent progress on flexible electrode materials based on carbon nanotubes, graphene, carbon cloth, conductive paper (cellulose), textiles and some other low-dimensional nanostructured materials. Then recently proposed prototypes of flexible cable/wire type, transparent and stretchable lithium-ion batteries are highlighted. The latest advances in the exploration of other flexible battery systems such as lithium–sulfur, Zn–C (MnO2) and sodium-ion batteries, as well as related electrode materials are included. Finally, the prospects and challenges toward the practical uses of flexible lithium-ion batteries in electronic devices are discussed.

1,271 citations

Journal ArticleDOI
TL;DR: The Li-conducting Li3PO4 SEI layer with a high Young's modulus can effectively reduce side reactions between Li metal and the electrolyte and can restrain Li dendrite growth in lithium-metal batteries during cycling.
Abstract: A Li3PO4 solid electrolyte interphase (SEI) layer is demonstrated to be stable in the organic electrolyte, even during the Li deposition/dissolution process. Thus, the Li-conducting Li3PO4 SEI layer with a high Young's modulus can effectively reduce side reactions between Li metal and the electrolyte and can restrain Li dendrite growth in lithium-metal batteries during cycling.

1,196 citations

Journal ArticleDOI
TL;DR: A route for the preparation of binder-free sulfur-carbon cathodes is developed for lithium sulfur batteries that demonstrate good electrochemical performance at high current density attributed to the uniform dispersion of sulfur inside the carbon fiber.
Abstract: A route for the preparation of binder-free sulfur-carbon cathodes is developed for lithium sulfur batteries. The method is based on the impregnation of elemental sulfur into the micropores of activated carbon fibers. These electrodes demonstrate good electrochemical performance at high current density attributed to the uniform dispersion of sulfur inside the carbon fiber.

833 citations

Journal ArticleDOI
TL;DR: Results suggest that the WO3–x@Au@MnO2 NWs have promising potential for use in high-performance flexible supercapacitors.
Abstract: WO3–x@Au@MnO2 core–shell nanowires (NWs) are synthesized on a flexible carbon fabric and show outstanding electrochemical performance in supercapacitors such as high specific capacitance, good cyclic stability, high energy density, and high power density. These results suggest that the WO3–x@Au@MnO2 NWs have promising potential for use in high-performance flexible supercapacitors.

631 citations

Journal ArticleDOI
TL;DR: A carbon nanofiber-based electrode, exhibiting a large accessible surface area (derived from the nanometer-sized fiber diameter), high carbon purity (without binder), relatively high electrical conductivity, structural integrity, thin web macromorphology, a large reversible capacity (ca.
Abstract: A carbon nanofiber-based electrode, exhibiting a large accessible surface area (derived from the nanometer-sized fiber diameter), high carbon purity (without binder), relatively high electrical conductivity, structural integrity, thin web macromorphology, a large reversible capacity (ca. 450 mA h g–1), and a relatively linearly inclined voltage profile, is fabricated by nanofiber formation via electrospinning of a polymer solution and its subsequent thermal treatment. It is envisaged that these characteristics of this novel carbon material will make it an ideal candidate for the anode material of high-power lithium-ion batteries (where a high current is critically needed), owing to the highly reduced lithium-ion diffusion path within the active material.

555 citations