A spongy mesoporous titanium nitride material as sulfur host for high performance lithium-sulfur batteries

You, Hairui; Shi, Mingchen; Hao, Junwei; Min, Huihua; Ye, Hui; Liu, Xiaomin

doi:10.1016/j.jallcom.2020.153879

Cited by 19 publications

(9 citation statements)

References 35 publications

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“…[ 51 ] However, the value of Q H /Q L is <3 when the unfavorable reaction such as the irreversible loss of the active material and the sluggish redox reaction occurs. [ 52 ] Figure 5d shows the ratios of Q H /Q L at different current densities. At the current densities from 0.1 to 5 C, the values of the Q H /Q L ratio for Co@CNT/nG were higher than those of others.…”

Section: Resultsmentioning

confidence: 99%

Multidimensional Hybrid Architecture Encapsulating Cobalt Oxide Nanoparticles into Carbon Nanotube Branched Nitrogen‐Doped Reduced Graphene Oxide Networks for Lithium–Sulfur Batteries

Yeon

Park

et al. 2021

Energy & Environ Materials

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Lithium–sulfur batteries (LSBs) are regarded as promising candidates for the next‐generation energy storage devices owing to their high‐theoretical capacity (1675 mAh g−1) and affordable cost. However, several limitations of LSBs such as the lithium polysulfide shuttle, large volume expansion, and low electrical conductivity of sulfur need to be resolved for practical applications. To address these limitations, herein, a multidimensional architectured hybrid (Co@CNT/nG), where Co3O4 nanoparticles are encapsulated into three‐dimensional (3D) porous N‐doped reduced graphene oxide interconnected with carbon nanotube (CNT) branches, is synthesized through a simple pyrolysis method. The synergistic effect achieved through the homogeneously distributed and encapsulated Co3O4 nanoparticles, the interconnected CNT branches, and the 3D hierarchical porous structure and N‐doping of Co@CNT/nG significantly suppresses the shuttle effect of lithium polysulfides and enhances the conversion redox kinetics for the improved sulfur utilization. We validate this effect through various measurements including symmetric cells, Li2S nucleation, shuttle currents, Tafel slopes, diffusion coefficients, and post‐mortem analyses. Importantly, Co@CNT/nG‐70S‐based LSB cells achieve a high‐specific capacity of 1193.1 mAh g−1 at 0.1 C and a low capacity decay rate of 0.030% per cycle for 700 cycles at 5 C, delivering a high areal capacity of 5.62 mAh cm−2 even with a loading of 6.5 mg cm−2.

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Section: Resultsmentioning

confidence: 99%

Multidimensional Hybrid Architecture Encapsulating Cobalt Oxide Nanoparticles into Carbon Nanotube Branched Nitrogen‐Doped Reduced Graphene Oxide Networks for Lithium–Sulfur Batteries

Yeon

Park

et al. 2021

Energy & Environ Materials

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“…First, the ex situ Raman analysis was performed on the CPC interlayer at characteristic voltage points, as illustrated in Figure 7a , respectively. 54,55 At the discharge cutoff voltage of 1.6 V, broad peaks attributed to Li 2 S (174, 400 cm −1 ) and Li 2 S 2 (452 cm −1 ) were found. 54,56 Features at 152, 218, and 474 cm −2 were observed at 2.8 V and were consistent with the main Raman peaks of pure S 8 (Figure S20), indicating that LiPSs were reversibly oxidized.…”

Section: Electrochemical Performancementioning

confidence: 98%

“…54,55 At the discharge cutoff voltage of 1.6 V, broad peaks attributed to Li 2 S (174, 400 cm −1 ) and Li 2 S 2 (452 cm −1 ) were found. 54,56 Features at 152, 218, and 474 cm −2 were observed at 2.8 V and were consistent with the main Raman peaks of pure S 8 (Figure S20), indicating that LiPSs were reversibly oxidized. It is intriguing that the peak of S 6 2− /S 8 2− reappeared at 2.35 V charging after discharging at 2.25 V. The changes in Raman peaks demonstrate that sulfur species during the operation of Li−S batteries can achieve reversible chemical conversion with the assistance of the CPC interlayer.…”

Section: Electrochemical Performancementioning

confidence: 98%

Introduced Hierarchically Ordered Porous Architecture on a Separator as an Efficient Polysulfide Trap toward High-Mass-Loading Li–S Batteries

Zhang,

Lin,

Xiao

et al. 2024

ACS Appl. Mater. Interfaces

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The severe shuttle effect and the depletion of active sulfur result in performance deterioration, presenting two formidable issues that must be overcome to achieve high-mass-loading lithium−sulfur batteries. Herein, we reported a composite separator by introducing carbon photonic crystals with a hierarchically ordered porous structure on a commercial separator. The ordered structure and interconnected hierarchical macro−meso−micropore network of the composite separator facilitate efficient trapping of polysulfides and rapid transport of lithium ions. The high ion diffusivity promotes the conversion of polysulfides enhancing sulfur utilization and mitigating the occurrence of "dead sulfur" on the surface of the separator. Impressively, under a high sulfur loading of 3 mg cm −2 , the lithium−sulfur battery with the composite separator displayed a high reversible capacity of 1582 mA h g −1 at 0.1 C and an excellent long-term cycling performance with a decay rate of as low as 0.033% per cycle over 1500 cycles at 1 C. Surprisingly, the battery represented a high reversible capacity of 935 mA h g −1 at 0.2 C even at a sulfur loading of 6.71 mg cm −2 . The design of the composite separator underscores the pivotal role of carbon architecture in improving battery performance and brings a bright prospect to enable the commercialization of high-mass-loading lithium−sulfur batteries.

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“…In the study of Li/S batteries to suppress the shuttling of lithium polysulfides between cathodes and a Li anode, the carbonous materials with designed pore structures are widely explored, − mainly to improve the conductivity of a sulfur cathode and retard the shuttle effect through the weak physical interaction between nonpolar carbon materials and the polar polysulfides. Then, the polar materials, such as metal oxides (TiO 2 and MoO 3 ), sulfides (MoS 2 , TiS 2 , and Co 9 S 8 ), and nitrides (TiNand Fe 2 N), have been utilized to address the shuttling issue by virtue of their strong interactions with polysulfides. Metal sulfides with high conductivity and strong affinity to polysulfides make themselves stand out to host sulfur in comparison with oxides .…”

Section: Introductionmentioning

confidence: 99%

Freestanding Fe_0.4Co_8.6S₈ Nanotube/Nanosheet Arrays on Carbon Cloth as a Host for High-Performance Li/SeS₂ Batteries

You

Zhang

Hao

et al. 2021

ACS Appl. Energy Mater.

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To inhibit the shuttle effect and promote the electrochemical performance of the Li/SeS 2 batteries, the threedimensional (3D) conductive composite of freestanding Fe 0.4 Co 8.6 S 8 nanotube/nanosheet arrays on carbon cloth (CC@ Fe 0.4 Co 8.6 S 8 ) is designed and synthesized to host SeS 2 . The integrated host appears in the form of the Fe 0.4 Co 8.6 S 8 nanosheets growing on the surface of nanotubes supported by carbon cloth, which provides a great surface area and offers secondary protection from nanosheets against shuttle of polyselenides/sulfides on the basis of nanotubes. Such enhanced physical confinement, along with chemical immobilization of the polar Fe 0.4 Co 8.6 S 8 , ensures high capability to adsorb polyselenides/sulfides. The wellconstructed conductive network facilitates the fast redox reaction to lessen the dissolution and diffusion of polyselenides/sulfides. It was demonstrated by the adsorption test and explained by the systematic self-discharge experiments. As a result, upon the elevated current density and/or SeS 2 loading, the deliberately designed architecture of CC@Fe 0.4 Co 8.6 S 8 can exhibit large reversible capacity as well as great energy density. Specifically, with the areal loading of 2 mg cm −2 , the CC@Fe 0.4 Co 8.6 S 8 /SeS 2 electrode delivers high discharge capacity of 888 mAh g −1 at 1.0 A g −1 and excellent rate capability (585 mAh g −1 at 4.0 A g −1 ). In addition, with the areal loading increasing to 3.6 mg cm 2 , the cathode still reaches an ultrahigh capacity of 703 mAh g −1 at 1.0 A g −1 . Upon further increasing SeS 2 loading to 4.8 mg cm 2 , the corresponding areal energy density reaches 8.05 mWh cm −2 at 0.2 A g −1 . This contribution adopts a less complex structure to address the issues in Li/SeS 2 batteries. The effectiveness of shuttle inhibition is explained quantitatively through a systematic study on self-discharge phenomena, besides the electrochemical performance.

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A spongy mesoporous titanium nitride material as sulfur host for high performance lithium-sulfur batteries

Cited by 19 publications

References 35 publications

Multidimensional Hybrid Architecture Encapsulating Cobalt Oxide Nanoparticles into Carbon Nanotube Branched Nitrogen‐Doped Reduced Graphene Oxide Networks for Lithium–Sulfur Batteries

Multidimensional Hybrid Architecture Encapsulating Cobalt Oxide Nanoparticles into Carbon Nanotube Branched Nitrogen‐Doped Reduced Graphene Oxide Networks for Lithium–Sulfur Batteries

Introduced Hierarchically Ordered Porous Architecture on a Separator as an Efficient Polysulfide Trap toward High-Mass-Loading Li–S Batteries

Freestanding Fe_0.4Co_8.6S₈ Nanotube/Nanosheet Arrays on Carbon Cloth as a Host for High-Performance Li/SeS₂ Batteries

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A spongy mesoporous titanium nitride material as sulfur host for high performance lithium-sulfur batteries

Cited by 19 publications

References 35 publications

Multidimensional Hybrid Architecture Encapsulating Cobalt Oxide Nanoparticles into Carbon Nanotube Branched Nitrogen‐Doped Reduced Graphene Oxide Networks for Lithium–Sulfur Batteries

Multidimensional Hybrid Architecture Encapsulating Cobalt Oxide Nanoparticles into Carbon Nanotube Branched Nitrogen‐Doped Reduced Graphene Oxide Networks for Lithium–Sulfur Batteries

Introduced Hierarchically Ordered Porous Architecture on a Separator as an Efficient Polysulfide Trap toward High-Mass-Loading Li–S Batteries

Freestanding Fe0.4Co8.6S8 Nanotube/Nanosheet Arrays on Carbon Cloth as a Host for High-Performance Li/SeS2 Batteries

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Freestanding Fe_0.4Co_8.6S₈ Nanotube/Nanosheet Arrays on Carbon Cloth as a Host for High-Performance Li/SeS₂ Batteries