Mitigating voltage decay of O3‐NaNi_1/3Fe_1/3Mn_1/3O₂ layered oxide cathode for sodium‐ion batteries by incorporation of 5d metal tantalum

Carbon Neutralization, Journal Year: 2024, Volume and Issue: 3(4), P. 584 - 596

Published: May 28, 2024

Abstract The cycling stability of O3‐type NaNi 1/3 Fe Mn O 2 (NFM) as a commercial cathode material for sodium ion batteries (SIBs) is still challenge. In this study, the Ni/Fe/Mn elements are replaced successfully with tantalum (Ta) in NFM lattice, which generated additional delocalized electrons and enhanced binding ability between transition metal oxygen, resulting suppressed lattice distortion during charging discharging. This caused significant mitigation voltage decay improved cycle within potential range 2.0–4.2 V. optimized Na(Ni ) 0.97 Ta 0.03 sample achieved reversible capacity 162.6 mAh g −1 at current rate 0.1 C 73.2 high 10 C. Additionally, average charge/discharge retention reached 98% after 100 cycles, significantly mitigating decay. work demonstrates contribution towards practical utilization cathodes SIBs energy storage field.

Language: Английский

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O3/P2 Biphasic Layered Cathode Material for Stable Na-Ion Storage

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Language: Английский

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Probing the Compositional and Structural Effects on the Electrochemical Performance of Na(Mn‐Fe‐Ni)O₂ Cathodes in Sodium‐Ion Batteries

Battery energy, Journal Year: 2025, Volume and Issue: unknown

Published: March 22, 2025

ABSTRACT This study systematically investigates an Mn‐Fe‐Ni pseudo‐ternary system for Na(Mn‐Fe‐Ni)O 2 cathodes, focusing on the effects of varying transition metal fractions structural and electrochemical properties. X‐ray diffraction reveals that increasing Mn content induces biphasic behavior. A higher Ni reduces c parameter, while Fe concentrations expand lattice. Average particle size increases with increase in Fe/Ni ratio. NaMn 0.500 0.125 0.375 O delivers a high specific capacity ~149 mAh g⁻¹ 2.0–4.0 V range. Galvanostatic charge‐discharge dQ/dV versus curves suggest Ni/Fe ratio > 1 enhances lowers voltage polarization materials. 0.250 demonstrated best rate performance, exhibiting 85.7% at 1C 69.7% 3C, compared to 0.1C, 0.625 (MFN‐512) excelled cyclic stability, retaining 93% after 100 cycles. The performance MFN‐512 full cell configuration was studied hard carbon as anode, resulting ~92 g −1 nominal ~2.9 0.1C rate, demonstrating its potential practical applications. Transmission electron microscopy confirmed nature MFN‐512, columnar growth P2 O3 phases. Electrochemical impedance spectroscopy revealed better‐performing samples have lower charge transfer resistance. Operando Synchrotron XRD reversible phase transformations driven by optimized ratios fraction. work outlines systematic approach optimizing low‐cost, high‐performance layered oxides.

Language: Английский

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Research progress on P2-type layered oxide cathode materials for sodium-ion batteries

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 500, P. 157264 - 157264

Published: Nov. 1, 2024

Language: Английский

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Rational Design of an Optimal Al-substituted Layered Oxide Cathode for Na-ion Batteries

Electrochimica Acta, Journal Year: 2024, Volume and Issue: 494, P. 144457 - 144457

Published: May 17, 2024

Language: Английский

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Elucidating the Electrochemical Behavior of a P3-type High-Na-Content Cathode

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(13), P. 12140 - 12149

Published: June 13, 2024

Layered oxide materials are often regarded as prospective positive electrodes for Na-ion batteries owing to their superior electrochemical properties and facile synthesis. In this work, a high-Na-content P3-type cathode (NaMn0.6Ni0.3Cu0.1O2; P3-NMNC) was prepared by the sol–gel technique. These exhibited excellent rate performance specific capacity (discharge at 3C being 77% of that 0.1C). Even 10C, cells retained ∼45 mAh g–1. The P3-NMNC half-cells were cycled between two voltage ranges, 2.0–4.0 V 2.0–4.2 V, among which former an 83% retention after 200 cycles, vastly latter, where degradation in dropped below 80% just 75 cycles. dQ/dV vs plots revealed irreversible peak above 4.0 during first desodiation process, is attributed anionic redox leading poor cyclability. Operando synchrotron X-ray diffraction studies reversible P3 ↔ P3′ O3 transformation NMNC sodiation–desodiation. repeated transformations resulted strain due changes lattice parameters causing degradation. DNa+ determined using galvanostatic intermittent titration technique order 10–12 10–10 cm2 s–1. results underscore importance scarcely explored layered cathodes toward advancement batteries.

Language: Английский

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Elevating the Concentration of Na Ions to 1 in P2 Type Layered Oxide Cathodes

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Abstract Layered oxide cathodes, particularly those with P2 and P3 type structures, have lower specific capacities limited by the Na‐ion content in their structure. In this study, Na is elevated to its uppermost limit a cathode. The material synthesized monophasic P3, (with minor O3 phase), biphasic P3/P2 configuration. During electrochemical testing, compounds exhibited excellent performance, reaching 102 87 mAh g −1 , respectively, at 6C. A full cell fabricated using cathode demonstrated capacity of 123 0.1C retained 90% initial after 200 cycles 0.2C. structural integrity both materials supported operando synchrotron X‐ray diffraction data, which showed no phase transformations showing only 0.78% variation unit volume. These findings highlight transformative potential achieving high concentrations P2‐type materials, paving way for developing high‐performance sodium‐ion batteries.

Language: Английский

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Ti-Substitution Facilitating Anionic Redox and Cycle Stability in a P2-Type Na_2/3Mn_2/3Ni_1/3O₂ Na-Ion Battery Cathode

Energy & Fuels, Journal Year: 2025, Volume and Issue: 39(6), P. 3348 - 3358

Published: Jan. 30, 2025

P2-type layered oxides have attracted tremendous attention as the leading candidate for cathode material in Na-ion batteries owing to their ease of synthesis and facile diffusion. In this work, an in-depth investigation electrochemical behavior (space group P63/mmc) 10% Ti-doped Na2/3Mn2/3Ni1/3O2 is carried out different voltage ranges (1.5-4.0 V, 2.0-4.0 2.0-4.5 V). Ti4+ doping found disrupt Na-ion/vacancy ordering increase Na-O2 layer spacings, which results improved rate performance (~68 mAh g-1 at 5C V range). range, Na2/3Mn0.567Ti0.100Ni1/3O2 (NMNT) exhibits a reduced initial specific discharge capacity 140 significantly retention 71% after 100 cycles due enhanced reversibility anionic redox. Better charge-discharge cycling stability NMNT (80% 0.33C 1.5-4.0 range) evidences Ti4+-induced disruption cooperative Jahn-Teller distortion. Galvanostatic intermittent titration confirm higher Na+ diffusion coefficients NMNT. Interestingly, marginally cathode-electrolyte interphase resistance endorsed by impedance measurements, while overall cell charge-transfer are much lower (by ~45% ~56.7%, respectively) than Na2/3Mn2/3Ni1/3O2.

Language: Английский

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P2/O3 biphasic Fe/Mn based cathodes for simultaneously realizing kinetic-enhancement and air-stabilization

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161765 - 161765

Published: March 1, 2025

Language: Английский

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Regulation of P2/O3 layered-oxide cathode by cation potential and dual-site doping provides excellent electrochemical performance

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137437 - 137437

Published: March 1, 2025

Language: Английский

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