Efficient energy storage and fast switching capabilities in Nd-substituted La2Sn2O7 pyrochlores

Quader, Abdul; Mustafa, Ghulam; Abbas, S. Kumail; Ahmad, Habib; Riaz, Saira; Naseem, Shahzad; Atiq, Shahid

doi:10.1016/j.cej.2020.125198

Cited by 50 publications

(20 citation statements)

References 32 publications

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“…Here, P and N represented the number of refined parameters and the number of experimentally observed points and I o and I c presented the observed and calculated integrated intensities, respectively. Accordingly, w i was the illustrating weight factor at i point of the diffraction profile and the goodness of fit (χ 2 ) was measured using Equation ( 8), given as [25]:…”

Section: Resultsmentioning

confidence: 99%

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Rapid Microwave Synthesis of β-SnWO4 Nanoparticles: An Efficient Anode Material for Lithium Ion Batteries

et al. 2021

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We report a facile synthesis of β-SnWO4 nanoparticles via a microwave heat treatment using SnCl2 and H2WO4 in the presence of tamarind seed powder. An X-ray diffraction analysis confirmed a crystalline nature revealing a cubic structure of β-SnWO4 nanoparticles. The morphological features were visualized using a scanning electron microscope that exhibited homogenously distributed clusters of nanoparticles, which were further confirmed using a transmission electron microscope. The micrographs also displayed some porosity. Energy dispersive X-ray spectroscopy confirmed the elemental contents such as tin, oxygen and tungsten in the same stoichiometric ratio as expected by the respective empirical formula. A high-resolution transmission electron microscope was used to find the d-spacing, which was ultimately used to analyze the structural parameters. The spectrum obtained using Fourier transform infrared spectroscopy illuminated different stretching vibrations. Additionally, a Barrett–Joyner–Halenda analysis was carried out to investigate the N2 adsorption-desorption isotherm as well as to govern the pore size distribution. Cyclic voltammetry measurements were implemented to analyze the ongoing electrode reactions throughout the charge/discharge for the β-SnWO4 nanostructures. The galvanometric charge/discharge curves for β-SnWO4 are also discussed. A high specific capacitance (600 mAhg–1 at 0.1 C) and excellent columbic efficiency (~100%) were achieved.

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Section: Resultsmentioning

confidence: 99%

“…No significant phase transformation was perceived attributing the pure phase formation of the specimen. The structural reliability was evaluated by measuring R-factors such as the R-profile (Rp), the R-expected (Rexp), the R-profile (Rwp) and the R-Bragg (RB) as well through the following Equations [25]:…”

Section: Resultsmentioning

confidence: 99%

Rapid Microwave Synthesis of β-SnWO4 Nanoparticles: An Efficient Anode Material for Lithium Ion Batteries

et al. 2021

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“…Numerous efforts have been prepared in the field of produce various forms of photocatalyst such as graphene-based nanocomposite [13] , [14] , binary oxides [10] , [15] and ternary nano-photocatalyst [16] . La 2 Sn 2 O 7 Pyrochlore-type oxide as a semiconductor nano-oxide has an appropriate performance in diverse applications such as photocatalysis [17] , energy storage [18] , [19] and catalysis [20] , [21] . Owning to the intense efficacy of fabrication approaches on the form and dimension of nanoproducts, the preparation path of pyrochlore La 2 Sn 2 O 7 nano samples is significant.…”

Section: Introductionmentioning

confidence: 99%

La2Sn2O7/g-C3N4 nanocomposites: Rapid and green sonochemical fabrication and photo-degradation performance for removal of dye contaminations

Talebzadeh

Masjedi-Arani

Amiri

et al. 2021

Ultrasonics Sonochemistry

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“…Fortunately, PAA, owning a pyrochlore‐phase crystal framework, allows a good flexibility in compositional tuning, which is in favor of the element doping/substitution. [ 15–17 ] From the structural viewpoint, pyrochlore PAA is built up of corner‐sharing SbO 6 octahedra that establish a 3D (Sb 2 O 6 2− ) framework, in which interconnected tunnel‐like structure with a large hydronium (H 3 O + )‐containing cavity exist. Such open tunnels are in favor of proton mobility (10 −3 –10 −4 S cm −1 ) under the “Grotthuss mechanism” and especially the ion exchange process with various size metal cations, such as Li + (0.076 nm), Na + (0.102 nm), Mn 2+ (0.083 nm), Co 2+ (0.065 nm), and Ni 2+ (0.069 nm).…”

Section: Introductionmentioning

confidence: 99%

Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes

et al. 2020

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Given the inherent features of open tunnel‐like pyrochlore crystal frameworks and pentavalent antimony species, polyantimonic acid (PAA) is an appealing conversion/alloying‐type anode material with fast solid‐phase ionic diffusion and multielectron reactions for lithium‐ion batteries. Yet, enhancing the electronic conductivity and structural stability are two key issues in exploiting high‐rate and long‐life PAA‐based electrodes. Herein, these challenges are addressed by engineering a novel multidimensional integrated architecture, which consists of 0D Mn‐substituted PAA nanocrystals embedded in 1D tubular graphene scrolls that are co‐assembled with 2D N‐doped graphene sheets. The integrated advantages of each subunit synergistically establish a robust and conductive 3D electrode framework with omnidirectional electron/ion transport network. Computational simulations combined with experiments reveal that the partial‐substitution of H3O+ by Mn2+ into the tunnel sites of PAA can regulate its electronic structure to narrow the bandgap with increased intrinsic electronic conductivity and reduce the Li+ diffusion barrier. All above merits enable improved reaction kinetics, adaptive volume expansion, and relieved dissolution of active Mn2+/Sb5+ species in the electrode materials, thus exhibiting ultrahigh rate capacity (238 mAh g−1 at 30.0 A g−1), superfast‐charging capability (fully charged with 56% initial capacity for ≈17 s at 80.0 A g−1) and durable cycling performance (over 1000 cycles).

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Efficient energy storage and fast switching capabilities in Nd-substituted La2Sn2O7 pyrochlores

Cited by 50 publications

References 32 publications

Rapid Microwave Synthesis of β-SnWO4 Nanoparticles: An Efficient Anode Material for Lithium Ion Batteries

Rapid Microwave Synthesis of β-SnWO4 Nanoparticles: An Efficient Anode Material for Lithium Ion Batteries

La2Sn2O7/g-C3N4 nanocomposites: Rapid and green sonochemical fabrication and photo-degradation performance for removal of dye contaminations

Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes

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