Rational design of 3D hierarchical MXene@AlF3/Ni(OH)2 nanohybrid for high-performance lithium-sulfur batteries

Wen, Caiying; Zheng, Xingzi; Li, Xingyu; Yuan, Mengwei; Li, Huifeng; Sun, Genban

doi:10.1016/j.cej.2020.128102

Cited by 56 publications

(16 citation statements)

References 78 publications

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“…In the cathodic scans, two noticeable reduction peaks are found at around 2.3 and 2.03 V, which correspond with two discharge plateaus in Figure a. In the subsequent anode scans, an oxidation peak appears at about 2.4 V due to the transformation from Li 2 S 2 /Li 2 S to high-order polysulfide or S . Obviously, the peak current density of the two cathodic peaks and anode peak of Zr-MOF/Ti 3 C 2 T x /S are larger than those of Ti 3 C 2 T x /S and Zr-MOF/S.…”

Section: Resultsmentioning

confidence: 97%

“…The higher voltage plateaus are ascribed to the lithiation of elemental sulfur to a series of soluble polysulfides (Li 2 S x , 4 < x < 8). The presence of a lower voltage plateau derives from the conversion of higher-order LiPSs to insoluble sulfides (Li 2 S x , 1 < x < 2). , Compared with Ti 3 C 2 T x /S (0.22 V) and Zr-MOF/S (0.21 V), the spacing between charge and discharge voltages of Zr-MOF/Ti 3 C 2 T x /S is much smaller (0.17 V), indicating that the low polarization in the charge and discharge processes can be achieved by the Zr-MOF/Ti 3 C 2 T x /S composite . The CV measurement is used to explore the kinetic behavior of the electrochemical reaction.…”

Section: Resultsmentioning

confidence: 99%

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Hierarchical nMOF-867/MXene Nanocomposite for Chemical Adsorption of Polysulfides in Lithium–Sulfur Batteries

Wen

Guo

Zheng

et al. 2021

ACS Appl. Energy Mater.

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Lithium–sulfur battery, a promising candidate for rechargeable battery, has aroused wide attention since the traits of high theoretical energy density and low cost. Nevertheless, issues of poor conductivity, severe volume change during cycling, and particular deleterious shuttle effects impede the commercialization of lithium–sulfur batteries. Herein, a convenient and scalable method via electrostatic self-assembly and in situ solvothermal strategies is employed to prepare three-dimensional hierarchical nMOF-867/Ti3C2T x . In this advantageous heterostructure, nMOF-867 with rich porosity not only provides the accommodation of sulfur but also enables chemical binding of polysulfides through stable double bonds (Li–N and Zr–S bond), while the distribution of nMOF-867 on the highly conductive Ti3C2T x would promote redox conversion kinetics of adsorbed polysulfides. Furthermore, structurally stable nMOF-867/Ti3C2T x can serve as a buffer to reduce the volume expansion during the charge/discharge process. Hence, nMOF-867/Ti3C2T x , the sulfur host of lithium–sulfur batteries, exhibits a high reversible capacity of 1302 mAh g–1 at 0.2 C and a remarkable rate capability of 581 mAh g–1 at 4 C. Impressively, a high initial capacity of 801 mAh g–1 can be retained at 1 C, with the slight capacity fading rate of 0.054% per cycle over 1000 charge/discharge cycles. This work provides the inspiration to generally fabricate the well-designed MXene-based nanocomposites for lithium–sulfur batteries with good performance.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Hierarchical nMOF-867/MXene Nanocomposite for Chemical Adsorption of Polysulfides in Lithium–Sulfur Batteries

Wen

Guo

Zheng

et al. 2021

ACS Appl. Energy Mater.

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“…Du et al encapsulated sulfur in TiO 2 hollow spheres and embedded them into Ti 2 C interlayers, this electrode maintained a capacity of 227.3 mAh·g −1 after 200 cycles at 5C [ 110 ]. Wen et al used NH 4 BF 4 /HCl etching to grow AlF 3 nanoparticles on MXene and then introduced Ni(OH) 2 nanosheets as a physical baffle to hinder LiPSs; this cathode exhibited an extremely low capacity decay rate in 1000 cycles of 1C (0.048% per cycle) [ 111 ].…”

Section: Mxenes In Li–s Batteriesmentioning

confidence: 99%

Advanced Nanostructured MXene-Based Materials for High Energy Density Lithium–Sulfur Batteries

Tian

Han

et al. 2022

IJMS

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Lithium–sulfur batteries (LSBs) are one of the most promising candidates for next-generation high-energy-density energy storage systems, but their commercialization is hindered by the poor cycling stability due to the insulativity of sulfur and the reaction end products, and the migration of lithium polysulfide. MXenes are a type of emerging two-dimensional material and have shown excellent electrochemical properties in LSBs due to their high conductivity and large specific surface area. Herein, several synthetic strategies developed for MXenes since their discovery are summarized alongside discussion of the excellent properties of MXenes for LSBs. Recent advances in MXene-based materials as cathodes for LSBs as well as interlayers are also reviewed. Finally, the future development strategy and prospect of MXene-based materials in high-energy-density LSBs are put forward.

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“…After 50 cycles, the charge-discharge curves present good overlap, which indicates that the material possesses good cycling stability in the later cycle. According to the mass ratio of the active product, the theoretical mass specific capacity of the electrode material (3157.5 mAh g −1 ) can be estimated from Equation (1). where C theoretical represents the theoretical capacity of the composite, and C Si , C Fe2O3 , and C rGO represent the theoretical capacity of Si, Fe 2 O 3 , and rGO, respectively.…”

Section: Electrochemical Performance Of Li-ion Batteriesmentioning

confidence: 99%

“…Over the past few decades many energy storage devices have been designed to meet the needs of electric vehicles and portable electronic devices in the context of rapid fossil fuel consumption [1][2][3][4][5][6]. Lithium-ion batteries (LIBs) are receiving increasing attention on account of their long life, high energy density, and environmental friendliness [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Si/Fe2O3-Anchored rGO Frameworks as High-Performance Anodes for Li-Ion Batteries

Yan

Chen

et al. 2021

IJMS

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By virtue of the high theoretical capacity of Si, Si-related materials have been developed as promising anode candidates for high-energy-density batteries. During repeated charge/discharge cycling, however, severe volumetric variation induces the pulverization and peeling of active components, causing rapid capacity decay and even development stagnation in high-capacity batteries. In this study, the Si/Fe2O3-anchored rGO framework was prepared by introducing ball milling into a melt spinning and dealloying process. As the Li-ion battery (LIB) anode, it presents a high reversible capacity of 1744.5 mAh g−1 at 200 mA g−1 after 200 cycles and 889.4 mAh g−1 at 5 A g−1 after 500 cycles. The outstanding electrochemical performance is due to the three-dimensional cross-linked porous framework with a high specific surface area, which is helpful to the transmission of ions and electrons. Moreover, with the cooperation of rGO, the volume expansion of Si is effectively alleviated, thus improving cycling stability. The work provides insights for the design and preparation of Si-based materials for high-performance LIB applications.

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Rational design of 3D hierarchical MXene@AlF3/Ni(OH)2 nanohybrid for high-performance lithium-sulfur batteries

Cited by 56 publications

References 78 publications

Hierarchical nMOF-867/MXene Nanocomposite for Chemical Adsorption of Polysulfides in Lithium–Sulfur Batteries

Hierarchical nMOF-867/MXene Nanocomposite for Chemical Adsorption of Polysulfides in Lithium–Sulfur Batteries

Advanced Nanostructured MXene-Based Materials for High Energy Density Lithium–Sulfur Batteries

Synthesis of Si/Fe2O3-Anchored rGO Frameworks as High-Performance Anodes for Li-Ion Batteries

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