Ca-doped Na-site NaNi1/3Fe1/3Mn1/3O2 as a high-performance cathode material for sodium ion batteries

Tao, Qingdong; Ding, Haiyang; Zhao, Haomiao; Huang, Junjie; Dai, Binghan; Li, Jing

doi:10.1016/j.jallcom.2023.172977

Cited by 13 publications

(1 citation statement)

References 43 publications

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“…53 Liang et al found out that 10% Cu substitution could also mitigate the sudden phase transitions in Na x MnO 2 . 76 Ca doping 79 or reconfiguration of TMO 2 layers by Cu, Ni, Fe, Mn, etc. also makes sense in smoothing or mitigating the phase transition in O3 type materials.…”

Section: Discussion Of Effects On Structurementioning

confidence: 99%

Cation Configuration and Structural Degradation of Layered Transition Metal Oxides in Sodium-Ion Batteries

Yang,

Wang,

Liu

et al. 2024

ACS Nano

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Given the pressing depletion of lithium resources, sodium-ion batteries (SIBs) stand out as a cost-effective alternative for energy storage solutions in the near future. Layered transition metal oxides (LTMOs) emerge as the leading cathode materials for SIBs due to their superior specific capacities and abundant raw materials. Nonetheless, achieving long-term stability in LTMOs for SIBs remains a challenge due to the inevitable structural degradation during charge− discharge cycles. The complexity and diversity of cation configurations/superstructures within the transition metal layers (TMO 2 ) further complicate the understanding for newcomers. Therefore, it is critical to summarize and discuss the factors leading to structural degradation and the available strategies for enhancing LTMOs' stability. In this review, the cationic configurations of TMO 2 layers are introduced from a crystallographic perspective. It then identifies and examines four key factors responsible for structural decay, alongside the impacts of various modification strategies. Finally, more effective and practical research approaches for investigating LTMOs have been proposed. The work aims to enhance the comprehension of the structural deterioration of LTMOs and facilitate a substantial improvement in their cycle life and energy density.

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Section: Discussion Of Effects On Structurementioning

confidence: 99%

Cation Configuration and Structural Degradation of Layered Transition Metal Oxides in Sodium-Ion Batteries

Yang,

Wang,

Liu

et al. 2024

ACS Nano

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Tuning Electronegativity‐Difference Configuration to Construct Non‐Bonded O 2p Orbitals for Reversible Anionic Redox in O3‐Type Cathode

Li,

Yu,

Zhang

et al. 2024

Adv Funct Materials

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How to tune the activity and reversibility of oxygen anion redox (OAR) is a critical issue for O3‐type sodium‐ion battery (SIB) cathodes. Herein, the key role of electronegativity‐difference configuration on the activation of OAR is find out, and further tune electronegativity‐difference configuration with La incorporation to construct non‐bonded O 2p orbitals and achieve the reversible anionic redox in O3‐type NaMn1/3Fe1/3Ni1/3O2. Owing to the special extranuclear electronic structure of La3+ [Xe], the La electron cloud is difficult to be disturbed by the O electron cloud, and some O electrons do not participate in the formation of ionic bonds, thus retaining the non‐bonded electrons of O 2p and activating OAR. Moreover, La3+ doping also decreases the Coulomb force between Na+ and O2− favoring Na+ migration as well as strengthening the La─O bonds inhibiting the irreversible phase transition. La2O3 coating layer also plays a role on inhibiting the reaction between molecular oxygen and the electrolyte, and making OAR reversible. After modification, the cycling stability is significantly improved (86.9% vs 27.3%@2C@200cycles; 90.8% vs 52.9%@5C@300 cycles). This study presents some insights on OAR activation mechanism and offers a facile strategy to improve the activity and reversibility of OAR for designing high performance SIBs cathodes.

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Phase Heterojunction by Constructing Built‐In Electric Field toward Sodium‐Rich Cathode Material

Lai,

Liu,

Gao

et al. 2024

Adv Funct Materials

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An artificial built‐in electric field from phase heterojunction is constructed within sodium‐rich manganese‐based layer‐structured oxide O3‐Na[Ni0.3Mn0.55Cu0.1Ti0.05]O2@Na2MoO4 through shared oxygen atoms. The spinel Na2MoO4 phase behaves as a p‐type semiconductor, while the O3‐Na[Ni0.3Mn0.55Cu0.1Ti0.05]O2 phase functions as an n‐type semiconductor. It can efficiently reduce the diffusion barrier and enhance electron transport, which can adequately promote the interfacial desolvation ability and reduce bulk lattice strains. The formed spinel heterostructure with crystal structure stability can also enhance the interface Na+ diffusion and protect the electrode against moisture and carbon dioxide corrosion. Besides, the molybdenum introduction within the lattice bulk can enhance the bond covalency, fortifying lattice oxygen stability and restraining structural distortion effectively. The obtained cathode demonstrates a high up to 224.61 mAh g−1 discharge specific capacity at 0.1 C and a long cycle stability with a 60.44% capacity retention after 265 cycles at 0.5 C. This study illuminates the potential of Na‐rich Mn‐based oxide cathodes for high‐energy‐density sodium battery utilizations.

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Ca-doped Na-site NaNi1/3Fe1/3Mn1/3O2 as a high-performance cathode material for sodium ion batteries

Cited by 13 publications

References 43 publications

Cation Configuration and Structural Degradation of Layered Transition Metal Oxides in Sodium-Ion Batteries

Cation Configuration and Structural Degradation of Layered Transition Metal Oxides in Sodium-Ion Batteries

Tuning Electronegativity‐Difference Configuration to Construct Non‐Bonded O 2p Orbitals for Reversible Anionic Redox in O3‐Type Cathode

Phase Heterojunction by Constructing Built‐In Electric Field toward Sodium‐Rich Cathode Material

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