3D pomegranate-like TiN@graphene composites with electrochemical reaction chambers as sulfur hosts for ultralong-life lithium–sulfur batteries

Luo, Rongjie; Yu, Qiuhong; Lu, Yang; Zhang, Mengjie; Yan, Hailong; Liu, Xianming; Kim, Jang Kyo

doi:10.1039/c8nh00343b

Cited by 56 publications

(29 citation statements)

References 38 publications

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“…3c). The peak at 458.5 eV with a high intensity of Ti-O is clearly seen in the Ti 2p spectrum, which is due to the surface oxidation of the nano-sized TiN in the air [40]. Nevertheless, the XRD and XPS results confirm the formation of TiN nanocrystals on the N doped graphene sheets.…”

Section: Resultsmentioning

confidence: 93%

TiN nanocrystal anchored on N-doped graphene as effective sulfur hosts for high-performance lithium-sulfur batteries

Chen

Jin

Xie

et al. 2021

Journal of Energy Chemistry

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Section: Resultsmentioning

confidence: 93%

TiN nanocrystal anchored on N-doped graphene as effective sulfur hosts for high-performance lithium-sulfur batteries

Chen

Jin

Xie

et al. 2021

Journal of Energy Chemistry

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“…Although the CV curves deliver a similar shape, the anodic peak intensity of pSi-180 is higher than that of SiNPs. According to the Sevcik equation (Equation 3), the lithium-ion diffusion coefficient (

) for SiNPs ( Figure 7B ) and pSi-180 ( Figure 7D ) is 6.0 * 10 −10 and 1.4 * 10 −9 cm 2 s −1 , respectively, indicating that the pomegranate-like structured anode is conducive to the diffusion of lithium-ion (Feng et al, 2019 ; Luo et al, 2019 ; Mu et al, 2019 ).…”

Section: Resultsmentioning

confidence: 99%

“…Hence, the

of pSi-180 is slightly higher than that of SiNPs (calculated thorough EIS), which is in accordance with the result calculated through CV curves with different scan rates. The pomegranate-like structure could enhance the contact area between the active materials and electrolyte, thereby improving the charge transfer resistance and lithium-ion diffusion rate (Li et al, 2018 ; Luo et al, 2019 ; Wang B. et al, 2020 ).…”

Section: Resultsmentioning

confidence: 99%

Pomegranate-Like Structured Si@SiOx Composites With High-Capacity for Lithium-Ion Batteries

Liu

Qiao

et al. 2020

Front. Chem.

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Silicon anodes with an extremely high theoretical specific capacity of 4,200 mAh g −1 have been considered as one of the most promising anode materials for next-generation lithium-ion batteries. However, the large volume expansion during lithiation hinders its practical application. In this work, pomegranate-like Si@SiO x composites were prepared using a simple spray drying process, during which silicon nanoparticles reacted with oxygen and generated SiO x on the surface. The thickness of the SiO x layer was tuned by adjusting the drying temperature. In the unique architecture, the SiO x which serves as the protection layer and the void space in pomegranate-like structure could alleviate the volume expansion during repeated lithium insertion/extraction. As a lithium-ion battery anode, pomegranate-like Si@SiO x composites dried at 180 • C delivered a high specific capacity of 1746.5 mAh g −1 after 300 cycles at 500 mA g −1 .

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“…[ 2 ] Beyond that, the lower price and abundant natural reserves of sulfur also benefit the future practical of LSBs. [ 3 ] However, the research of LSBs is lagged by the “shuttle effect” caused by the free‐diffusion of lithium polysulfides (LPSs, Li 2 S 4 ‐Li 2 S 8 ) [ 4 ] and the insulation of sulfur. These follow continuous capacity loss and poor cyclic stability, which obstructs the practical application of LSBs.…”

Section: Figurementioning

confidence: 99%

Constructing Co₃S₄ Nanosheets Coating N‐Doped Carbon Nanofibers as Freestanding Sulfur Host for High‐Performance Lithium–Sulfur Batteries

et al. 2020

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Lithium-sulfur batteries (LSBs) have shown great potential as a rival for next generation batteries, for its relatively high theoretical capacity and eco-friendly properties. Nevertheless, blocked by the shuttle effect of lithium polysulfides (LPSs, Li 2 S 4-Li 2 S 8) and insulation of sulfur, LSBs show rapid capacity loss and cannot achieve the practical application. Herein, a composite of carbon nanofibers coated by Co 3 S 4 nanosheets (denoted as CNF@Co 3 S 4) is successfully synthesized as freestanding sulfur host to optimize the interaction with sulfur species. The combination of the two materials can lead extraordinary cycling and rate performance by alleviating the shuttle of LPSs effectively. N-doped carbon nanofibers serve as long-range conductive networks and Co 3 S 4 nanosheets can accelerate the conversion of LPSs through its electrocatalytic and chemical adsorption ability. Benefiting from the unique structure, the transporting rate of Li + can be enhanced. Distribution of Li + is uniform for enough exposed negative active sites. As a result, the cell with CNF@Co 3 S 4 as sulfur host is able to stabilize at 710 mA h g −1 at 1 C after 200 cycles with average coulombic efficiency of 97.8% in a sulfur loading of 1.7 mg cm −2 and deliver 4.1 mA h cm −2 at 0.1 C even in 6.8 mg cm −2 for 100 cycles. With the increasing development of energy storage field, batteries with much higher energy density and lower costs are urgently needed to satisfy the rising demands of portable devices and electrical vehicles. [1] Lithium-sulfur batteries (LSBs) have come

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3D pomegranate-like TiN@graphene composites with electrochemical reaction chambers as sulfur hosts for ultralong-life lithium–sulfur batteries

Abstract: 3D pomegranate-like TiN@graphene composites as novel sulfur host materials can effectively improve the electrochemical properties of Li–S systems.

Cited by 56 publications

References 38 publications

TiN nanocrystal anchored on N-doped graphene as effective sulfur hosts for high-performance lithium-sulfur batteries

TiN nanocrystal anchored on N-doped graphene as effective sulfur hosts for high-performance lithium-sulfur batteries

Pomegranate-Like Structured Si@SiOx Composites With High-Capacity for Lithium-Ion Batteries

Constructing Co₃S₄ Nanosheets Coating N‐Doped Carbon Nanofibers as Freestanding Sulfur Host for High‐Performance Lithium–Sulfur Batteries

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3D pomegranate-like TiN@graphene composites with electrochemical reaction chambers as sulfur hosts for ultralong-life lithium–sulfur batteries

Abstract: 3D pomegranate-like TiN@graphene composites as novel sulfur host materials can effectively improve the electrochemical properties of Li–S systems.

Cited by 56 publications

References 38 publications

TiN nanocrystal anchored on N-doped graphene as effective sulfur hosts for high-performance lithium-sulfur batteries

TiN nanocrystal anchored on N-doped graphene as effective sulfur hosts for high-performance lithium-sulfur batteries

Pomegranate-Like Structured Si@SiOx Composites With High-Capacity for Lithium-Ion Batteries

Constructing Co3S4 Nanosheets Coating N‐Doped Carbon Nanofibers as Freestanding Sulfur Host for High‐Performance Lithium–Sulfur Batteries

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Constructing Co₃S₄ Nanosheets Coating N‐Doped Carbon Nanofibers as Freestanding Sulfur Host for High‐Performance Lithium–Sulfur Batteries