Porous-Shell Vanadium Nitride Nanobubbles with Ultrahigh Areal Sulfur Loading for High-Capacity and Long-Life Lithium–Sulfur Batteries

Ma, Lianbo; Yuan, Hao; Zhang, Wenjun; Zhu, Guoyin; Wang, Yanrong; Hu, Yi; Zhao, Peiyang; Chen, Renpeng; Chen, Tao; Liu, Jie; Hu, Zheng; Jin, Zhong

doi:10.1021/acs.nanolett.7b04084

Cited by 211 publications

(150 citation statements)

References 60 publications

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“…TEM images of the TiN@CNFs, VN@CNFs, and TiN‐3VN@CNFs are presented in Figure S2 (Supporting Information), which show similar morphologies with the TiN‐VN@CNFs. The high‐resolution transmission electron microscopy (HRTEM) reveals clear lattice fringes measured to be 2.45 and 2.05 Å in Figure d,e, which are attributed to TiN (111) plane and VN (200) plane, respectively . Figure f and Figure S3 (Supporting Information) confirm several different TiN‐VN heterostructures of the TiN‐VN@CNFs, in which the twinborn interfaces of TiN and VN crystals can be clearly observed.…”

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confidence: 77%

“…Recently, transition metal nitride (e.g., TiN, VN, and MoN) have been used as anchoring materials because of the high conductivity and strong chemical adsorption for polysulfides . However, polysulfides transformation and Li 2 S precipitation behaviors were not investigated in these works, which is of great significance for enhancing the utilization of sulfur and improving the energy density of the batteries .…”

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confidence: 99%

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A Dual‐Functional Conductive Framework Embedded with TiN‐VN Heterostructures for Highly Efficient Polysulfide and Lithium Regulation toward Stable Li–S Full Batteries

et al. 2019

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Lithium-sulfur (Li-S) batteries have been regarded as the most promising candidates as the next-generation energy storage systems because of high theoretical capacities (Li: 3860 mAh g −1 and S: 1675 mAh g −1 ), low mass densities (Li: 0.534 g cm −3Lithium-sulfur (Li-S) batteries are strongly considered as next-generation energy storage systems because of their high energy density. However, the shuttling of lithium polysulfides (LiPS), sluggish reaction kinetics, and uncontrollable Li-dendrite growth severely degrade the electrochemical performance of Li-S batteries. Herein, a dual-functional flexible free-standing carbon nanofiber conductive framework in situ embedded with TiN-VN heterostructures (TiN-VN@CNFs) as an advanced host simultaneously for both the sulfur cathode (S/TiN-VN@CNFs) and the lithium anode (Li/TiN-VN@CNFs) is designed. As cathode host, the TiN-VN@CNFs can offer synergistic function of physical confinement, chemical anchoring, and superb electrocatalysis of LiPS redox reactions. Meanwhile, the well-designed host with excellent lithiophilic feature can realize homogeneous lithium deposition for suppressing dendrite growth. Combined with these merits, the full battery (denoted as S/TiN-VN@ CNFs || Li/TiN-VN@CNFs) exhibits remarkable electrochemical properties including high reversible capacity of 1110 mAh g −1 after 100 cycles at 0.2 C and ultralong cycle life over 600 cycles at 2 C. Even with a high sulfur loading of 5.6 mg cm −2 , the full cell can achieve a high areal capacity of 5.5 mAh cm −2 at 0.1 C. This work paves a new design from theoretical and experimental aspects for fabricating high-energy-density flexible Li-S full batteries.

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confidence: 77%

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confidence: 99%

A Dual‐Functional Conductive Framework Embedded with TiN‐VN Heterostructures for Highly Efficient Polysulfide and Lithium Regulation toward Stable Li–S Full Batteries

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Section: The Regulation Of Lipssmentioning

confidence: 99%

Rationalizing Electrocatalysis of Li–S Chemistry by Mediator Design: Progress and Prospects

Song

Cai

Kong

et al. 2019

Advanced Energy Materials

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The lithium–sulfur (Li–S) battery is regarded as a next‐generation energy storage system due to its conspicuous merits in high theoretical capacity (1672 mAh g−1), overwhelming energy density (2600 Wh kg−1), and the cost‐effectiveness of sulfur. However, the practical application of Li–S batteries is still handicapped by a multitude of key challenges, mainly pertaining to fatal lithium polysulfide (LiPS) shuttling and sluggish sulfur redox kinetics. In this respect, rationalizing electrocatalytic processes in Li–S chemistry to synergize the entrapment and conversion of LiPSs is of paramount significance. This review summarizes recent progress and well‐developed strategies of the mediator design toward promoted Li–S chemistry. The current advances, existing challenges, and future directions are accordingly highlighted, aiming at providing in‐depth understanding of the sulfur reaction mechanism and guiding the rational mediator design to realize high‐energy and long‐life Li–S batteries.

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“…Hybrid Fe 2 O 3 /porous graphene macrostructures were obtained by Zheng et al [30] and the theoretical calculation proved that the Fe 2 O 3 had a strong adsorption ability for lithium polysulfides. [32,34] Carbides like TiC were embedded in the mesopores of CMK-3 in the presence of supercritical fluid. [32,34] Carbides like TiC were embedded in the mesopores of CMK-3 in the presence of supercritical fluid.…”

Section: Sulfiphilic Few-layered Mose 2 Nanoflakes Decorated Rgo As Amentioning

confidence: 99%

Sulfiphilic Few‐Layered MoSe₂ Nanoflakes Decorated rGO as a Highly Efficient Sulfur Host for Lithium‐Sulfur Batteries

Tian

Feng

et al. 2019

Advanced Energy Materials

159

114

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Lithium‐sulfur batteries (LSBs) have been regarded as a competitive candidate for next‐generation electrochemical energy‐storage technologies due to their merits in energy density. The sluggish redox kinetics of the electrochemistry and the high solubility of polysulfides during cycling result in insufficient sulfur utilization, severe polarization, and poor cyclic stability. Herein, sulfiphilic few‐layered MoSe2 nanoflakes decorated rGO (MoSe2@rGO) hybrid has been synthesized through a facile hydrothermal method and for the first time, is used as a conceptually new‐style sulfur host for LSBs. Specifically, MoSe2@rGO not only strongly interacts with polysulfides but also dynamically strengthens polysulfide redox reactions. The polarization problem is effectively alleviated by relying on the sulfiphilic MoSe2. Moreover, MoSe2@rGO is demonstrated to be beneficial for the fast nucleation and uniform deposition of Li2S, contributing to the high discharge capacity and good cyclic stability. A high initial capacity of 1608 mAh g−1 at 0.1 C, a slow decay rate of 0.042% per loop at 0.25 C, and a high reversible capacity of 870 mAh g−1 with areal sulfur loading of 4.2 mg cm−2 at 0.3 C are obtained. The concept of introducing sulfiphilic transition‐metal selenides into the LSBs system can stimulate engineering of novel architectures with enhanced properties for various energy‐storage devices.

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Porous-Shell Vanadium Nitride Nanobubbles with Ultrahigh Areal Sulfur Loading for High-Capacity and Long-Life Lithium–Sulfur Batteries

Cited by 211 publications

References 60 publications

A Dual‐Functional Conductive Framework Embedded with TiN‐VN Heterostructures for Highly Efficient Polysulfide and Lithium Regulation toward Stable Li–S Full Batteries

A Dual‐Functional Conductive Framework Embedded with TiN‐VN Heterostructures for Highly Efficient Polysulfide and Lithium Regulation toward Stable Li–S Full Batteries

Rationalizing Electrocatalysis of Li–S Chemistry by Mediator Design: Progress and Prospects

Sulfiphilic Few‐Layered MoSe₂ Nanoflakes Decorated rGO as a Highly Efficient Sulfur Host for Lithium‐Sulfur Batteries

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Porous-Shell Vanadium Nitride Nanobubbles with Ultrahigh Areal Sulfur Loading for High-Capacity and Long-Life Lithium–Sulfur Batteries

Cited by 211 publications

References 60 publications

A Dual‐Functional Conductive Framework Embedded with TiN‐VN Heterostructures for Highly Efficient Polysulfide and Lithium Regulation toward Stable Li–S Full Batteries

A Dual‐Functional Conductive Framework Embedded with TiN‐VN Heterostructures for Highly Efficient Polysulfide and Lithium Regulation toward Stable Li–S Full Batteries

Rationalizing Electrocatalysis of Li–S Chemistry by Mediator Design: Progress and Prospects

Sulfiphilic Few‐Layered MoSe2 Nanoflakes Decorated rGO as a Highly Efficient Sulfur Host for Lithium‐Sulfur Batteries

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Sulfiphilic Few‐Layered MoSe₂ Nanoflakes Decorated rGO as a Highly Efficient Sulfur Host for Lithium‐Sulfur Batteries