Confining sulfur in intact freestanding scaffold of yolk-shell nanofibers with high sulfur content for lithium-sulfur batteries

Zhang, Xilai; Zhang, Peng; Zhang, Shijie; Zhang, Yongshang; Hou, Ruohan; Liu, Kangli; Miao, Fujun; Shao, Guosheng

doi:10.1016/j.jechem.2020.03.065

Cited by 21 publications

(10 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous materials have been explored to serve as sulfur hosts or additives to tackle the aforementioned issues, including nonpolar conductive carbon‐based materials 4,17–19 and polar compounds (oxides, nitrides, and carbides) 12,18,20–25 . Previous reports proved that nonpolar carbon materials are only able to offer limited affinity with LiPS, due to the rather weak van der Waals force in‐between 26–28 .…”

Section: Introductionmentioning

confidence: 99%

A flexible metallic TiC nanofiber/vertical graphene 1D/2D heterostructured as active electrocatalyst for advanced Li–S batteries

Zhang

et al. 2021

InfoMat

Self Cite

155

View full text Add to dashboard Cite

The realistic application of lithium–sulfur (Li–S) batteries has been severely hindered by the sluggish conversion kinetics of polysulfides (LiPS) and inhomogeneous deposition of Li2S at high sulfur loading and low electrolyte/sulfur ratio (E/S). Herein, a flexible Li–S battery architecture based on electrocatalyzed cathodes made of interfacial engineered TiC nanofibers and in situ grown vertical graphene are developed. Integrated 1D/2D heterostructured electrocatalysts are realized to enable highly improved Li+ and electron transportation together with significantly enhanced affinity to LiPS, which effectively accelerate the conversion kinetics between sulfur species, and thus induce homogeneous deposition of Li2S in the catalyzed cathodes. Consequently, highly active electro‐electrocatalysts‐based cells exhibit remarkable rate capability at 2C with a high specific capacity of 971 mAh g−1. Even at ultra‐high sulfur loading and low E/S ratio, the battery still delivers a high areal capacity of 9.1 mAh cm−2, with a flexible pouch cell being demonstrated to power a LED array at different bending angles with a high capacity over 100 cycles. This work puts forward a novel pathway for the rational design of effective nanofiber electrocatalysts for cathodes of high‐performance Li–S batteries.

show abstract

Section: Introductionmentioning

confidence: 99%

A flexible metallic TiC nanofiber/vertical graphene 1D/2D heterostructured as active electrocatalyst for advanced Li–S batteries

Zhang

et al. 2021

InfoMat

Self Cite

155

View full text Add to dashboard Cite

show abstract

“…inner hollow space in the nanofibers. Zhang et al [80] introduced a freestanding carbon nanofibers film with a yolk-shell structure of a complete hollow yolk-shell TiO 2 -CNFs@void@TiN@C composite. As shown in Figure 12c-f, this multifunctional 3D structural design possesses the following merits: i) The double conductive carbon skeleton offered the enhanced electron transfer efficiency between the composite and sulfur; ii) The large hollow space could load much sulfur and sustain the volume expansion; iii) The polar TiO 2 and TiN in the composite provided strong adsorption sites for the LiPSs; iv) The yolk-shell nanofiber structure effectively realized encapsulation of the LiPS.…”

Section: Composite Carbon Nanofibersmentioning

confidence: 99%

“…d) TEM and HRTEM images of TiO 2 -CNFs@void@TiN@C. e) Schematic illustration of the coaxial multilayered hollow structure of TiO 2 -CNFs@void@TiN@C. f) TEM image, linear elemental distributions, and area elemental distributions for C, N, O, Ti and S, of TiO 2 -CNFs@void@TiN@C/S. Reproduced with permission [80]. Copyright 2020, Elsevier.…”

mentioning

confidence: 99%

Lithium–Sulfur Batteries Meet Electrospinning: Recent Advances and the Key Parameters for High Gravimetric and Volume Energy Density

et al. 2021

Self Cite

View full text Add to dashboard Cite

Lithium–sulfur (Li–S) batteries have been regarded as a promising next‐generation energy storage technology for their ultrahigh theoretical energy density compared with those of the traditional lithium‐ion batteries. However, the practical applications of Li–S batteries are still blocked by notorious problems such as the shuttle effect and the uncontrollable growth of lithium dendrites. Recently, the rapid development of electrospinning technology provides reliable methods in preparing flexible nanofibers materials and is widely applied to Li–S batteries serving as hosts, interlayers, and separators, which are considered as a promising strategy to achieve high energy density flexible Li–S batteries. In this review, a fundamental introduction of electrospinning technology and multifarious electrospinning‐based nanofibers used in flexible Li–S batteries are presented. More importantly, crucial parameters of specific capacity, electrolyte/sulfur (E/S) ratio, sulfur loading, and cathode tap density are emphasized based on the proposed mathematic model, in which the electrospinning‐based nanofibers are used as important components in Li–S batteries to achieve high gravimetric (WG) and volume (WV) energy density of 500 Wh kg−1 and 700 Wh L−1, respectively. These systematic summaries not only provide the principles in nanofiber‐based electrode design but also propose enlightening directions for the commercialized Li–S batteries with high WG and WV.

show abstract

“…Recently, numerous materials have been adopted to address the above issues 10,23–32 . As a typical carbon material, graphene has been frequently chosen as a substrate to couple with some polar materials to restrict the shuttle effect and promote the conversion kinetics of sulfur species, or any lithiophilic compounds, to suppress the growth of lithium dendrites 33–35 .…”

Section: Introductionmentioning

confidence: 99%

Complex permittivity‐dependent plasma confinement‐assisted growth of asymmetric vertical graphene nanofiber membrane for high‐performance Li‐S full cells

Zhang

Wang

et al. 2022

InfoMat

Self Cite

View full text Add to dashboard Cite

Vertical graphene (VG), possessing superior chemical, physical, and structural peculiarities, holds great promise as a building block for constructing a high‐energy density lithium‐sulfur (Li‐S) battery. Therefore, it is desirable to develop a new VG growth technique with a novel structure to enable wide applications. Herein, we devise a novel complex permittivity‐dependent plasma confinement‐assisted VG growth technique, via asymmetric growing a VG layer on one side of N‐doped carbon nanofibers for the first time, using a unique lab‐built high flux plasma‐enhanced chemical vapor deposition system, as a bifunctional nanofiber membrane to construct Li‐S batteries with low negative/positive (N/P) and electrolyte/sulfur (E/S) ratios. The unique nanofiber membrane could simultaneously protect the cathode and anode, enabling an excellent electrochemical performance with low N/P and E/S ratios in Li‐S batteries. Such a full cell delivers high gravimetric energy density and volumetric energy density of 340 Wh kg−1 and 547 Wh L−1, respectively, at low N/P (2:1) and E/S (4:1) ratios. Furthermore, a pouch cell achieves a high areal capacity of 7.1 mAh cm−2 at a sulfur loading of 6 mg cm−2. This work put forward a novel pathway for the design of high‐energy density Li‐S batteries.

show abstract

Confining sulfur in intact freestanding scaffold of yolk-shell nanofibers with high sulfur content for lithium-sulfur batteries

Cited by 21 publications

References 53 publications

A flexible metallic TiC nanofiber/vertical graphene 1D/2D heterostructured as active electrocatalyst for advanced Li–S batteries

A flexible metallic TiC nanofiber/vertical graphene 1D/2D heterostructured as active electrocatalyst for advanced Li–S batteries

Lithium–Sulfur Batteries Meet Electrospinning: Recent Advances and the Key Parameters for High Gravimetric and Volume Energy Density

Complex permittivity‐dependent plasma confinement‐assisted growth of asymmetric vertical graphene nanofiber membrane for high‐performance Li‐S full cells

Contact Info

Product

Resources

About