Ultralow diffusion barrier induced by intercalation in layered N-based cathode materials for sodium-ion batteries

Jiang, Yundan; Xu, Wangping; Zhao, Wei; Cao, Juexian

doi:10.1039/d3ra00434a

Cited by 1 publication

(1 citation statement)

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“…The outcomes illustrate a significant decrease in the diffusion barrier with an increase of d 002 . A larger d 002 will facilitate Na diffusion between interlayers, resulting in an improved rate capability of HCs. , Based on the calculation outcomes, it can be concluded that dual-functionalized Ca with interlayer Ca 2+ to widen the d 002 and in situ CaSe templates to create hierarchical pore structures and induce intrinsic defects can thermodynamically and dynamically facilitate Na + storage and transport, contributing to excellent sodium storage performance.…”

Section: Resultsmentioning

confidence: 99%

Dual-Functionalized Ca Enables High Sodiation Kinetics for Hard Carbon in Sodium-Ion Batteries

Li,

Shi,

et al. 2024

ACS Appl. Mater. Interfaces

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Hard carbons (HCs), while a leading candidate for sodium-ion battery (SIB) anode materials, face challenges in their unfavorable sodiation kinetics since the intricate microstructure of HCs complicates the Na + diffusion channel. Herein, a Hovenia dulcis-derived HC realizes a markedly enhanced highrate performance in virtue of dual-functionalized Ca. The interlayer doped Ca 2+ effectively enlarges the interlayer spacing, while the in situ-formed CaSe templates induce the formation of hierarchical pore structures and intrinsic defects, significantly providing fast Na + diffusion channels and abundant active sites and thus enhancing the sodium storage kinetics. Achieved by the synergistic effect of regulation of intrinsic microcrystalline and pore structures, the optimized HC shows remarkable performance enhancements, including a high reversible capacity of 350.3 mA h g −1 after 50 cycles at 50 mA g −1 , a high-capacity retention rate of 95.3% after 1000 cycles, and excellent rate performance (108.4 mA h g −1 at 2 A g −1 ). This work sheds light on valuable insight into the structural adjustment of high-rate HCs, facilitating the widespread utilization of SIBs.

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Section: Resultsmentioning

confidence: 99%

Dual-Functionalized Ca Enables High Sodiation Kinetics for Hard Carbon in Sodium-Ion Batteries

Li,

Shi,

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

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Ultralow diffusion barrier induced by intercalation in layered N-based cathode materials for sodium-ion batteries

Abstract: Layered 2H-phase CrN2 with Cs intercalation possesses many advantages including an ultra-low diffusion barrier (0.04 eV), high voltage platform (3.9 V), and high energy density (903 W h kg−1), and is a promising candidate for SIB cathode materials.

Cited by 1 publication

References 38 publications

Dual-Functionalized Ca Enables High Sodiation Kinetics for Hard Carbon in Sodium-Ion Batteries

Dual-Functionalized Ca Enables High Sodiation Kinetics for Hard Carbon in Sodium-Ion Batteries

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