Deep-subwavelength engineering of stealthy hyperuniformity

Nanophotonics, Journal Year: 2025, Volume and Issue: 14(8), P. 1113 - 1122

Published: Jan. 6, 2025

Abstract Light behaviours in disordered materials have been of research interest primarily at length scales beyond or comparable to the wavelength light, because order and disorder are often believed be almost indistinguishable subwavelength regime according effective medium theory (EMT). However, it was demonstrated that breakdown EMT occurs even deep-subwavelength when interface phenomena, such as Goos–Hänchen effect, dominate light flows. Here we develop engineering multilayers achieve angle-selective manipulation wave localization. To examine disorder-dependent breakdown, classify intermediate microstructural phases between crystals uncorrelated through concept stealthy hyperuniformity (SHU). We devise material phase transitions from SHU for distinct angular responses localization by tailoring short-range long-range multilayers. The result paves way realization metamaterials, bridging fields photonics metamaterials.

Language: Английский

---

Electric polarization-enhanced optical thermometry in lanthanide ions-doped ferroelectric Bi4Ti3O12 nanosheets

Optics Letters, Journal Year: 2025, Volume and Issue: 50(4), P. 1377 - 1377

Published: Jan. 23, 2025

The demand for temperature measurement in optoelectronic integration has prompted research on advanced luminescent materials. Here, ferroelectric Bi 4 Ti 3 O 12 :Yb 3+ /Er /Nd nanosheets were designed optical thermometry. transition emissions of significantly enhanced through electric polarization engineering. By utilizing the fluorescence intensity ratio from Nd and Er ions, poled system achieved notable absolute relative sensing sensitivities 3.03 2.52% K −1 , respectively. These results highlight multi-band luminescence coupling characteristics lanthanide ion-doped suggest that field polarization-enhanced can serve a reference enhancing capabilities.

Language: Английский

---

Upcycling of spent LiCoO₂: engineering the coordination-trapping behavior towards conversion-type anodes for advanced Li-storage

Chemical Communications, Journal Year: 2025, Volume and Issue: 61(16), P. 3351 - 3354

Published: Jan. 1, 2025

Based on its high economic/sustainability value, the upcycling of spent cathodes into anodes has been deemed to be an alternative strategy traditional chemical synthesis. Supported by effective acid leaching and coordination-trapping self-assembly reaction, a nano-scale CoS@NSC anode was successfully prepared from LiCoO2 used as promising for lithium ion batteries.

Language: Английский

---

Manganese vacancy motivated structural disorder-to-order transformation to boost fast-charging and long-lasting sodium-ion battery P2-type layered cathode

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104114 - 104114

Published: Feb. 1, 2025

Language: Английский

---

Controlling Interlayer Disorder Toward Reversible Phase Transition in a Layered Sodium Manganese Oxide Cathode

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

Sodium manganese oxides are promising Na-ion battery cathodes but they suffer from irreversible phase transitions during electrochemical reactions. Most strategies to date have aimed suppress the by stabilizing their layered structures through limiting content of extractable Na+. Here, we conversely increase atomic disorder in Na-birnessite, a sodium oxide, and thereby modulate its transition behavior toward improved reversibility. Our study reveals that Mn vacancies migrated into interlayer affect local environment Na+ water molecules consequently enhancing mobility. We observe better capacity retention for disordered "D-Na-birnessite", which undergoes reversible birnessite-type structure an O′3-type α-NaxMnO2-like another intermediate metastable phase. This research highlights positive effects regulate routes achieving superior reversibility, finally paving way overcoming limits oxide cathodes.

Language: Английский

---

Tuning anionic bands and lattice stability by short-range disorder at nanoscale for ultrastable Co-free Li-rich cathode

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Language: Английский

---

Moisture-Resistant, Expansive, and Disordered Interlayer Microenvironment-Enabled Robust Sodium Oxide Cathodes

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Layered transition metal oxides are some of the most attractive cathode candidates for sodium-ion batteries (SIBs). The main challenge achieving superior storage performance is to simultaneously boost ion diffusion kinetics and restrain undesirable OP4 phase upon long-term cycling. In this report, a step-by-step molecule–ion exchange approach presented design high air-stability disordered Ca0.065Na0.55MnO2.05 (CNMO-1) functionalized with an expansive interlayer microenvironment. Theoretical experimental investigations revealed that water mediation enhance diffusion, while Ca ions stabilize alkali layer, preventing manganese (Mn) migration during high-voltage It exhibits specific capacity 135.4 mA h g–1 at 0.2 A g–1. Beyond that, it can also deliver 81.3 harsh condition 5 93.3% retention even after 2000 cycles, surpassing previous achievements. This proposed strategy be extended other K+, Zn2+, La3+ cases, showing innovative method designing robust cathodes SIBs.

Language: Английский

---

Surficial and Interior Incorporation of Borates Mitigating the Inherent Jahn–Teller Distortion in a P2 Mn‐Rich Layered Cathode for Na‐Ion Batteries

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

Published: Feb. 25, 2025

Abstract Layered Mn‐rich materials are regarded as a promising cathode candidate for Na‐ion batteries (NIBs) owing to its environmentally friendly nature, decent theoretical capacities, and relatively low cost. However, the irreversible phase transition originating from Jahn–Teller distortion attributed high‐spin Mn 3+ (t 2g 3 eg 1 ) during deep sodiation triggers serious structural degradation followed by capacity decay. Herein, incorporation of borate‐anion groups either into bulk (BO 3− or on surface 4 5− successfully modulates local‐structure environment P2‐type layered cathode, changing lattice parameters valence states metals inside. The optimized Na 0.734 Ni 0.207 0.694 Co 0.098 (B 0.063 O x )O 2‐x (B‐NCM) can remit P2‐P’2 mitigating inherent MnO 6 octahedra, allowing reversible with reduced strain even after 1.5 V. B‐NCM exhibits excellent retention, reaching 82.02% 200 cycles. In addition, modulated local structure inside helps relieve + /vacancy ordering, enhancing diffusivity rate capability compared pristine NCM analo. This work demonstrates novel approach based glassy anion both improve electrochemical properties materials.

Language: Английский

---

Unveiling the Chemical Heterogeneity and Structural Evolution in Oxide Cathodes During Ion Exchange

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

Published: April 5, 2025

Abstract Voltage decay is inevitable for the commercialization of Li‐rich nickel‐manganese oxides (LNMO). O2‐type LNMO with ABCBA oxygen stacking exhibits suppressed voltage decay, which can be prepared by chemical and electrochemical ion exchange from P2‐type sodium intermediate. Herein, impact these two methods on structural properties, behavior, evolution systematically investigated. Additionally, influence coexistence Li/Na in alkali metal layer migration phase transformation has been revealed. In process, occurs prior to activation due interplay concentration gradients activation. This rapid transition P2 O2 leads lattice spacing contraction, hinders Na + extraction during subsequent process. The resulting impure O2‐LNMO, containing a significant amount bulk, experiences pronounced strain cycling, leading particle cracking even fragmentation. To enhance performance electrochemically sample, it crucial balance rates driven differences activation, ensuring uniform complete transition. contrast, high‐crystallinity C‐LNMO demonstrates superior battery inhibited decay.

Language: Английский

---

P‐Type Stacking Dominated Electrochemical Process Enables Fast Na⁺ Transport for High‐Energy P2/O3 Biphasic Cathodes

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

Published: April 27, 2025

Abstract Fabricating P2/O3 intergrowth structure in layered cathode materials is a viable strategy to improve the electrochemical property of sodium‐ion batteries. Unfortunately, such biphasic have bear obscure thermodynamic formation process and complicated structure‐property associations between multiple phase transitions Na + diffusion kinetics at high state charge. Here this issue addressed by tailoring crystalline domains P2 O3 while reducing residual alkali content target P2/O3‐Na 0.8 Mg 0.06 Ni 0.34 Mn 0.54 Ti O 2 material, which consists 24.26% 75.74% phase. The distribution atomic resolution dynamic evolution identification are parsed out experimental scanning transmission electron microscopy FAULTS simulations. Moreover, dislocations boundary serve prevent O‐type stacking therefore allow most P‐type dominate deep Na‐depleted state, thereby facilitating ensure high‐rate capability. Consequently, material exhibits energy density 534 Wh kg −1 reversible capacity 110 mAh g 10 C. This work highlights importance modulation improving transport obtain high‐energy materials.

Language: Английский

---