High-Entropy Approach vs. Traditional Doping Strategy for Layered Oxide Cathodes in Alkali-Metal-Ion Batteries: A Comparative Study

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104295 - 104295

Published: May 1, 2025

Language: Английский

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Bulk-Doped Heavy Element Mitigating the Ligand-to-Metal Charge Transfer of LiCoO₂ toward its Robust High-Voltage Charging Stability

ACS Energy Letters, Journal Year: 2024, Volume and Issue: unknown, P. 6011 - 6021

Published: Nov. 24, 2024

Language: Английский

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Noninvasive rejuvenation strategy of nickel-rich layered positive electrode for Li-ion battery through magneto-electrochemical synergistic activation

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 26, 2024

Nickel-rich layered oxides are one of the most promising positive electrode active materials for high-energy Li-ion batteries. Unfortunately, practical performance is inevitably circumscribed by structural deterioration deriving from Ni/Li antisite disorder, leading to severe capacity loss and life attenuation. Herein, we propose an economical facile rejuvenation strategy employing magneto-electrochemical synergistic activation targeting in assembled This approach induces a transition Ni3+ high-spin low-spin, reducing super-exchange interaction Ni-O-transition metal (TM). Meanwhile, electrochemical reaction drives Li+ host material promotes reoccupy TM layer, recovering intrinsic Li site extending cycle life. The demonstrates that low-quality electrodes can be converted high-quality ones. Notably, method revitalize aged pouch cell (SiC||NCM811, 8 Ah nominal capacity) via optimizing cation occupancy increase its 10% 6.49 7.14 at 1 C, illustrating benefits upcycling process. Severe disorder nickel-rich leads degradation decay Here, authors report noninvasive magnetoelectrochemical realize ordered rearrangement recovery battery capacity.

Language: Английский

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Structural Disorder of a Layered Lithium Manganese Oxide Cathode Paving a Reversible Phase Transition Route toward Its Theoretical Capacity

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 22, 2024

Layered lithium manganese oxides suffer from irreversible phase transitions induced by Mn migration and/or dissolution associated with the Jahn–Teller effect (JTE) of Mn3+, leading to inevitable capacity fading during cycling. The popular doping strategy oxidizing Mn3+ Mn4+ relieve JTE cannot completely eliminate detrimental structural collapse cooperative JTE. Therefore, they are considered be impractical for commercial use as cathode materials. Here, we demonstrate a layered oxide that can charged and discharged without any serious using metastable Li-birnessite controlled disorder. Although is thermodynamically unstable under ambient conditions, Li ion exchange into Na-birnessite followed an optimal dehydration resulted in disordered Li-birnessite. control over crystal water interlayer provides intriguing short-range order therein, which help suppress parasitic dissolution, thereby ensuring reversible electrochemical redox behavior local structure change were investigated ex situ soft X-ray absorption spectroscopy (sXAS) pair distribution function (PDF) analysis. combined sXAS PDF analyses disclosed suppressed Dh contribute dramatically improving its reversiblity Our findings underscore substantial effects static disorder on stability reversibility oxide, Li-birnessite, extends practical close their theoretical limit.

Language: Английский

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High-voltage Ni-rich cathodes stabilized with dual gradients

Matter, Journal Year: 2024, Volume and Issue: 7(12), P. 4143 - 4145

Published: Dec. 1, 2024

Language: Английский

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Computational investigation of NaKFePO4F fluorophosphate as a high-performance cathode material for Na/K-ion batteries

Materials Today Physics, Journal Year: 2024, Volume and Issue: 50, P. 101623 - 101623

Published: Dec. 11, 2024

Language: Английский

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