Development of a high-rate-capable O3-structured ‘layered’ Na transition metal oxide by tuning the cation–oxygen bond covalency

Biswas, Ishita; Kumar, Bachu Sravan; Pradeep, Anagha; Das, Arpita; Srihari, Velaga; Poswal, H. K.; Mukhopadhyay, Amartya

doi:10.1039/d3cc00079f

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…This provided real-time information pertaining to the phase changes/transformations during the electrochemical sodiation/desodiation process. A similar setup, conditions, and source have also been used in some of our previous studies. ,− …”

Section: Experimental Detailsmentioning

confidence: 99%

Facile and Scalable Development of High-Performance Carbon-Free Tin-Based Anodes for Sodium-Ion Batteries

Gandharapu

Das

Tripathi

et al. 2023

ACS Appl. Mater. Interfaces

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Tin (Sn)-based anodes for sodium (Na)-ion batteries possess higher Na-storage capacity and better safety aspects compared to hard carbon -based anodes but suffer from poor cyclic stability due to volume expansion/contraction and concomitant loss in mechanical integrity during sodiation/ desodiation. To address this, the usage of nanoscaled electrodeactive particles and nanoscaled-carbon-based buffers has been explored, but with compromises with the tap density, accrued irreversible surface reactions, overall capacity (for "inactive" carbon), and adoption of non-scalable/complex preparation routes. Against this backdrop, anode-active "layered" bismuth (Bi) has been incorporated with Sn via a facile-cum-scalable mechanicalmilling approach, leading to individual electrode-active particles being composed of well-dispersed Sn and Bi phases. The optimized carbon-free Sn−Bi compositions, benefiting from the combined effects of "buffering" action and faster Na transport of Bi, to go with the greater Na-storage capacity and lower operating potential of Sn, exhibit excellent cyclic stability (viz., ∼83−92% capacity retention after 200 cycles at 1C) and rate capability (viz., no capacity drop from C/5 to 2C, with only ∼25% drop at 5C), despite having fairly coarse particles (∼5−10 μm). As proven by operando synchrotron X-ray diffraction and stress measurements, the sequential sodiation/desodiation of the components and, concomitantly, stress build-ups at different potentials provide "buffering" action even for such "active−active" Sn−Bi compositions. Furthermore, the overall stress development upon sodiation of Bi has been found to be significantly lower than that of Sn (by a factor of ∼3.8), which renders Bi promising as a "buffer" material, in general. Dissemination of such complex interplay between electrode-active components during electrochemical cycling also paves the way for the development of high-performance, safe, and scalable "alloyingreaction"-based anode materials for Na-ion batteries and beyond, sans the need for ultrafine/nanoscaled electrode particles or "inactive" nanoscaled-carbon-based "buffer" materials.

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Section: Experimental Detailsmentioning

confidence: 99%

Facile and Scalable Development of High-Performance Carbon-Free Tin-Based Anodes for Sodium-Ion Batteries

Gandharapu

Das

Tripathi

et al. 2023

ACS Appl. Mater. Interfaces

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“…Sodium-ion batteries (SIBs) emerge as a compelling alternative when seeking sustainable and efficient energy storage solutions, owing to their utilization of abundant and cost-effective sodium resources. 1–4 The cathode material, a crucial component of SIBs, typically dictates their performance in terms of operating voltage, energy density, and cost efficiency. 5–7 Among numerous promising cathode materials, transition metal oxides (Na x TMO 2 , TM = Ni, Co, Mn, etc. )…”

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confidence: 99%

Insights into dynamic structural evolution and its sodium storage mechanisms of P2/P3 composite cathode materials for sodium-ion batteries

Liu,

Hu,

Zhu

et al. 2024

Chem. Commun.

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Regulating bond structure and local electronic state optimizes the cycling stability of layered sodium-ion cathode materials

Lv,

Zhang,

Fei

et al. 2024

Appl. Phys. A

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Development of a high-rate-capable O3-structured ‘layered’ Na transition metal oxide by tuning the cation–oxygen bond covalency

Abstract: By developing a high rate-capable O3-structured Na(Li0.05Ni0.3Si0.05Ti0.45Cu0.1Mg0.05)O2-based cathode material for Na-ion batteries, wherein partial substitution of more electronegative Si4+ for Ti4+ in transition metal layer has weakened-cum-lengthened the Na-O bond,...

Cited by 4 publications

References 30 publications

Facile and Scalable Development of High-Performance Carbon-Free Tin-Based Anodes for Sodium-Ion Batteries

Facile and Scalable Development of High-Performance Carbon-Free Tin-Based Anodes for Sodium-Ion Batteries

Insights into dynamic structural evolution and its sodium storage mechanisms of P2/P3 composite cathode materials for sodium-ion batteries

Regulating bond structure and local electronic state optimizes the cycling stability of layered sodium-ion cathode materials

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