A novel O3 type NaNi0.5Mn0.5O2 positive electrode material with pillar effect for sodium ion batteries

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: 1028, P. 180683 - 180683

Published: April 28, 2025

Language: Английский

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Engineering Thermal Stability of Binary Manganese‐Based Layered Oxide Cathodes Toward Advanced Sodium‐Ion Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract The thermal stability is vital for layered oxide cathodes to boost the operation safety of rechargeable batteries, in particular, highly enriched transition metal Na‐based oxides sodium‐ion batteries (SIBs). Transition metals significantly influence catalysis, chemical/electrochemical reactions with electrolytes, yet catalysis capability different remains unclear. Here, three types binary manganese‐based (Na 0.78 TM 0.33 Mn 0.67 O 2 , = Cu, Ni, and Fe) revealed. CuMn‐based has minimum catalytic effect on electrolyte decomposition when charged high voltages, delivering a good stability, as revealed by combining density function theoretic calculations, thermogravimetry, differential scanning calorimetry measurements. Further promotion electrochemical performance performed MgTi co‐doping suppress irreversible phase enhance superior Na + diffusion kinetics. Consequently, highest onset temperature (269.5 °C) lowest heat generation (106.8 J g −1 ) are achieved co‐doped cathode, well remarkable capacity retention 91.7% upon 500 cycles at 1C. results provide new insight into constructing high‐efficiency cathode materials SIBs.

Language: Английский

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Jahn‐Teller Effect in Sodium Layered Oxide Cathodes: Inducement Mechanisms, Mitigation Strategies, and Rational Utilizations

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

Published: May 2, 2025

Abstract The sodium‐layered transition metal oxides (Na x TMO 2 ) are regarded as the promising cathode for sodium‐ion batteries (SIBs) relying on their high theory capacity and cost‐effectiveness. Nevertheless, intrinsic lattice distortions caused by Jahn‐Teller active ions significantly degrade structural stability of Na , generally resulting in unsatisfactory electrochemical properties. In this review, begins introducing inducement mechanisms effect (TM) ions. Subsequently, restraining strategies well corresponding using element doping/substitutions, surface reconstructions, polyphase symbiosis, TM/oxygen/Na + vacancy manipulations summarized detail. Specifically, influences such mitigation deformation properties, phase evolution behaviors, TM dissolution characteristics, crystal comprehensively discussed. Furthermore, sensible utilization distortion is to build cathodes with and/or repaid ion transport kinetics well. end, challenges faced amelioration methods overviewed put forward research directions future trenchantly constrain 6 octahedron deformation. This work will provide more perceptions further studies SIBs.

Language: Английский

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Structural Stability of Layered Oxides for Sodium-Ion Batteries: Insights and Strategies

Energy storage materials, Journal Year: 2025, Volume and Issue: 79, P. 104303 - 104303

Published: May 5, 2025

Language: Английский

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Regulating Bond Structure in Polyanion Cathode for Long-Cycle-Life Sodium-Ion Batteries

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2778 - 2787

Published: May 15, 2025

Language: Английский

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