Nonmetal Substitution in Interstitial Site of O3‐NaNi_0.5Mn_0.5O₂ Induces the Generation of a Nearly Zero Strain P2&O3 Biphasic Structure as Ultrastable Sodium‐Ion Cathode

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 23, 2024

Abstract Co‐free O3‐type NaNi 0.5 Mn O 2 cathode material for sodium‐ion batteries has shown great promise due to its high theoretical capacity and plentiful Na reservoir. However, the rapid recession caused by harmful phase transition large volume strain severely restricts their practical application. Herein, obstacle is well addressed constructing a P2&O3 biphasic structure via customized boron‐doping strategy. The light‐weight boron doping in interstitial position reduces energy gap of formation P2 O3 structure, which induces biphase state. In addition, exhibits near zero lattice interlocking effect P2&O3, as identified situ X‐ray diffraction measurement. As result, it presents remarkable cyclability with retention 85.2% over 1000 cycles at rate 5 C. More importantly, pouch‐type full‐cell device can exhibit long cycling life 70.8% 150 0.1 This work offer new inspiration designing advanced sodium electrode materials light element future storage devices.

Язык: Английский

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Reviving Sodium Tunnel Oxide Cathodes Based on Structural Modulation and Sodium Compensation Strategy Toward Practical Sodium‐Ion Cylindrical Battery

Advanced Materials, Год журнала: 2024, Номер 36(41)

Опубликована: Сен. 2, 2024

Abstract As a typical tunnel oxide, Na 0.44 MnO 2 features excellent electrochemical performance and outstanding structural stability, making it promising cathode for sodium‐ion batteries (SIBs). However, suffers from undesirable challenges such as surface residual alkali, multiple voltage plateaus, low initial charge specific capacity. Herein, an internal external synergistic modulation strategy is adopted by replacing part of the Mn with Ti to optimize bulk phase construct Ti‐containing epitaxial stabilization layer, resulting in reduced + transport kinetics improved water/air stability. Specifically, 0.85 0.15 O using water‐soluble carboxymethyl cellulose binder can realize capacity retention rate 94.30% after 1,000 cycles at 2C, stability further verified kilogram large‐up applications. In addition, taking advantage rich content Prussian blue analog (PBA), PBA‐Na 1‐x x composites are designed compensate insufficient oxide matched hard carbon achieve preparation coin full cell 18650 cylindrical battery satisfactory performance. This work enables application oxides SIBs first time promotes commercialization SIBs.

Язык: Английский

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Electrochemical coupling in subnanometer pores/channels for rechargeable batteries

Chemical Society Reviews, Год журнала: 2024, Номер 53(8), С. 3829 - 3895

Опубликована: Янв. 1, 2024

This review categorizes subnanometer pores/channels (SNPCs) from structural perspective and demonstrates electrochemical couplings in SNPCs for batteries while proposing corresponding challenges future research directions.

Язык: Английский

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An air-stable single-crystal layered oxide cathode based on multifunctional structural modulation for high-energy-density sodium-ion batteries

Science China Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Янв. 8, 2024

Язык: Английский

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A hydro-stable and phase-transition-free P2-type cathode with superior cycling stability for high-voltage sodium-ion batteries

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160010 - 160010

Опубликована: Янв. 1, 2025

Язык: Английский

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