Biomimetic 3D Fe/CeO2 decorated N-doped carbon nanotubes architectures for high-performance lithium-sulfur batteries

Wang, Tianyi; Su, Dawei; Chen, Yi; Yan, Kang; Yu, Lei; Liu, Lin; Zhong, Yunhao; Notten, Peter H. L.; Wang, Chengyin; Wang, Guoxiu

doi:10.1016/j.cej.2020.126079

Cited by 53 publications

(16 citation statements)

References 47 publications

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“…Unfortunately, because of the nonpolar nature of carbon-based materials, they exhibit inferior adsorption ability and barely affects the dissolution of highly polar LiPS. Consequently, some polar elements were added into the system through heteroatom doping or surface modification to provide a polar state and hence improve the affinity between the host materials and the LiPS. , However, the limited active sites of the host material inevitably result in the accumulation of LiPS. Additionally, because of the host’s introduction, the sulfur content of the battery will decrease, which means that the high energy density advantage of Li–S batteries will not be fully realized.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Guo

Zhao

Miao

et al. 2022

ACS Appl. Energy Mater.

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Because of the high theoretical capacity of lithium–sulfur (Li–S) batteries and the relatively low cost of sulfur, these batteries have been regarded as one of the most promising types of energy storage systems. The severe shuttle effect of the polysulfide deteriorates the cycle stability, and the inferior conductivity of the sulfur and polysulfide also lead to sluggish electrochemical kinetics. Herein, we use a facile molten salt method to synthesize the heterostructure Mo–MoB, which is coated on a commercial PP separator for the Li–S batteries. Experimental analysis and theoretical calculation results show that the heterostructure Mo–MoB can serve as a physical barrier and chemical absorbent to hinder the shuttle effect, as well as be a bidirectional catalyst to simultaneously accelerate the conversion of polysulfides into Li2S and decomposition of Li2S with the synergistically catalytic effect of Mo and MoB. Consequently, the cell with the heterostructure Mo–MoB-modified separator demonstrates superior cycle performance (capacity fading rate of ∼0.07% per cycle during 300 cycles at 0.5 C) as well as increased rate capability (670 mAh g–1 at 2 C). This work indicates that heterostructure metal borides could be adsorption-catalysis material to functionalize the separator, which can be a new strategy to design the high-performance Li–S batteries.

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Section: Introductionmentioning

confidence: 99%

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Guo

Zhao

Miao

et al. 2022

ACS Appl. Energy Mater.

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“…For example, carbonaceous material hosts can physically confine sulfur and thus effectively mitigate the poor electrical conductivity of S and the loss of soluble LiPSs. , Nevertheless, the electrochemical performance of these materials is mediocre, due mainly to the poor affinity of nonpolar carbon to the polarized LiPSs. To address this issue, a number of strategies have been developed, including heteroatom doping − and using metal sulfide, oxide, nitride, and metal–organic framework (MOF) hosts. , Although considerable improvements have been achieved, these improvements fail to enhance the intrinsically sluggish reaction kinetics of LiPSs with limited host materials, especially the liquid-solid phase transformation of soluble Li 2 S 4 to solid Li 2 S (which contributes 75% of the theoretical capacity of the Li-S battery). − …”

mentioning

confidence: 99%

Monodisperse Molybdenum Nanoparticles as Highly Efficient Electrocatalysts for Li-S Batteries

et al. 2021

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Lithium-sulfur (Li-S) batteries have attracted widespread attention due to their high theoretical energy density. However, their practical application is still hindered by the shuttle effect and the sluggish conversion of lithium polysulfides (LiPSs). Herein, monodisperse molybdenum (Mo) nanoparticles embedded onto nitrogen-doped graphene (Mo@N-G) were developed and used as a highly efficient electrocatalyst to enhance LiPS conversion. The weight ratio of the electrocatalyst in the catalyst/sulfur cathode is only 9%. The unfilled d orbitals of oxidized Mo can attract the electrons of LiPS anions and form Mo–S bonds during the electrochemical process, thus facilitating fast conversion of LiPSs. Li-S batteries based on the Mo@N-G/S cathode can exhibit excellent rate performance, large capacity, and superior cycling stability. Moreover, Mo@N-G also plays an important role in room-temperature quasi-solid-state Li-S batteries. These interesting findings suggest the great potential of Mo nanoparticles in building high-performance Li-S batteries.

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“…As shown in Fig. 4b, the Zn 2p spectrum can be deconvoluted 4c-d and S24a) [24,[58][59][60]. As for N 1s spectra, three component peaks can be matched corresponding to pyridinic N (398.1 eV), pyrrolic N (399.4 eV), and graphitic N (400.1 eV), respectively (Figs.…”

Section: Resultsmentioning

confidence: 90%

Freestanding and Flexible Interfacial Layer Enables Bottom-Up Zn Deposition Toward Dendrite-Free Aqueous Zn-Ion Batteries

et al. 2022

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Aqueous rechargeable zinc ion batteries are regarded as a competitive alternative to lithium-ion batteries because of their distinct advantages of high security, high energy density, low cost, and environmental friendliness. However, deep-seated problems including Zn dendrite and adverse side reactions severely impede the practical application. In this work, we proposed a freestanding Zn-electrolyte interfacial layer composed of multicapsular carbon fibers (MCFs) to regulate the plating/stripping behavior of Zn anodes. The versatile MCFs protective layer can uniformize the electric field and Zn2+ flux, meanwhile, reduce the deposition overpotentials, leading to high-quality and rapid Zn deposition kinetics. Furthermore, the bottom-up and uniform deposition of Zn on the Zn-MCFs interface endows long-term and high-capacity plating. Accordingly, the Zn@MCFs symmetric batteries can keep working up to 1500 h with 5 mAh cm−2. The feasibility of the MCFs interfacial layer is also convinced in Zn@MCFs||MnO2 batteries. Remarkably, the Zn@MCFs||α-MnO2 batteries deliver a high specific capacity of 236.1 mAh g−1 at 1 A g−1 with excellent stability, and maintain an exhilarating energy density of 154.3 Wh kg−1 at 33% depth of discharge in pouch batteries.

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Biomimetic 3D Fe/CeO2 decorated N-doped carbon nanotubes architectures for high-performance lithium-sulfur batteries

Cited by 53 publications

References 47 publications

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Monodisperse Molybdenum Nanoparticles as Highly Efficient Electrocatalysts for Li-S Batteries

Freestanding and Flexible Interfacial Layer Enables Bottom-Up Zn Deposition Toward Dendrite-Free Aqueous Zn-Ion Batteries

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