In Situ Balanced Synthesis of High-Activity Low-Spin Iron Cathode Prussian Blue for Enhanced Sodium-Ion Storage

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Янв. 10, 2025

The growing market for sodium-ion batteries has stimulated interest in research on Prussian blue-type cathode materials. Iron hexacyanoferrate (FeHCF) is considered a desirable cathode, but the incomplete electrochemical property of its low-spin iron sites hinders further practical application. In this paper, carboxymethyl cellulose demonstrated to have an appropriate binding energy through DFT calculations, synthesize blue situ, balance Fe3+ and water FeHCF, introduce FeIII vacancies activate Fe sites. Thus, at 1 C rate, it achieves initial discharge capacity 154.7 mAh g–1 with density 470.8 Wh kg–1. retention 70.2% after 4000 cycles rate 100 C. This work provides simpler way develop more cost-effective, faster, durable materials storage.

Язык: Английский

---

Enhanced Li-ion battery performance based on multisite oxygen vacancies in WO3-x@rGO negative electrode

Chemical Engineering Journal, Год журнала: 2024, Номер 498, С. 155383 - 155383

Опубликована: Авг. 30, 2024

Язык: Английский

---

Recent advances in alloying anode materials for sodium-ion batteries: material design and prospects

Energy Materials, Год журнала: 2024, Номер 4(6)

Опубликована: Июль 12, 2024

Sodium-ion batteries (SIBs) are close to commercialization. Although alloying anodes have potential use in next-generation SIB anodes, their limitations of low capacities and colossal volume expansions must be resolved. Traditional approaches involving structural compositional tunings not been able break these lofty barriers. This review is devoted recent progress research on alloy-based comprising Sn, Sb, P, Ge, Si. The current level understanding, challenges, modifications, optimizations employed up date, shortfalls faced by also described. A detailed future outlook proposed, focusing advanced nanomaterial tailoring methods component modifications fabrication. Utilizing the latest state-of-the-art characterization techniques, including ex-situ operando tools, can help us better understand (de)sodiation mechanism accompanying capacity fading pathways pave way for SIBs with anode materials.

Язык: Английский

---

Carbon Mediated Multifunctional Sb₂Se₃–WSe₂ Heterostructure Nanofiber Facilitates Rapid and Stable Na⁺ Transport

Advanced Functional Materials, Год журнала: 2024, Номер 34(28)

Опубликована: Март 10, 2024

Abstract Alloying metal selenides as advanced anode materials for sodium‐ion devices requires overcoming the challenges of high diffusion energy barriers and large volume expansion at high‐power densities. The typical dealloying process is difficult to trigger under fast kinetics, leading limited capacity utilization. Here, Sb/W‐hybridization precursor synthesized by one‐step reaction, followed electrostatic spinning strategy achieve a localized domain‐limiting effect. Finally, carbon mediated Sb 2 Se 3 –WSe heterostructure nanofiber (SbWSe/C/NF) are obtained after carbonization/selenization process. Physical characterization theoretical calculations reveal that SbWSe/C/NF‐500 has heterogeneous structure abundant edge defects, facilitating rapid Na + transfer from exterior interior. Furthermore, compared with /C monomer, SbWSe/C shows significant reaction current densities, enhancing Resultantly, half‐cell electrode demonstrates excellent rate capability specific 553.7 mA h g −1 250 cycles A . Meanwhile, assembled capacitor exhibits 80.83% retention 8000 3800 W kg design cationic heterostructures dual‐carbon introduction provides reference developing anodes.

Язык: Английский

---

Multi-dimensional Sb2S3@MoS2 heterojunctions for electromagnetic wave absorption

Materials Today Nano, Год журнала: 2025, Номер unknown, С. 100620 - 100620

Опубликована: Апрель 1, 2025

Язык: Английский

---

Design and Optimization of Iron‐Based Superionic‐Like Conductor Anode for High‐Performance Lithium/Sodium‐Ion Batteries

Small Methods, Год журнала: 2024, Номер unknown

Опубликована: Сен. 11, 2024

Abstract Metal selenides have received extensive research attention as anode materials for batteries due to their high theoretical capacity. However, significant volume expansion and slow ion migration rate result in poor cycling stability suboptimal performance. To address these issues, the present work utilized multivalent iron ions construct fast pathways similar superionic conductors (Fe‐SSC) introduced corresponding selenium vacancies enhance its Based on first‐principles calculations molecular dynamics simulations, it is demonstrated that addition of presence reduced material's function adsorption energy, lowered barriers, enhances Li + Na . In Li‐ion half batteries, this composite material exhibites reversible capacity 1048.3 mAh g −1 at 0.1 A after 100 cycles 483.6 5.0 1000 cycles. Na‐ion 687.7 200 325.9 It proven based Fe‐SSC great applications both batteries.

Язык: Английский

---

Fe-Co heterostructured FeTe2/CoTe2 anode: Enhanced ion transport and cycling stability with volume expansion control

Journal of Power Sources, Год журнала: 2025, Номер 632, С. 236361 - 236361

Опубликована: Янв. 31, 2025

Язык: Английский

---

Surface Functional Modification for Boosting Power Density of Hydrovoltaic Devices

Advanced Functional Materials, Год журнала: 2023, Номер 34(14)

Опубликована: Дек. 22, 2023

Abstract Generating electricity based on the interaction between water and materials is a new green energy harvesting technology. However, performance streaming potential generation not sufficient to drive microelectronic devices with high power supply demands. In this work, an asymmetric sandwich structure designed adjustable of hydrovoltaic as system for micro‐electronic devices. The flexible device that only consumes renewable low‐cost, non‐polluting, highly sustainable, achieving satisfied output density exceeding 124.5 µW·cm −2 (2075 −3 ). Both experimental results theoretical calculations reveal working principle depends evaporation rather than potential. addition, integration multiple makes it easy electronic correct operation storage. For first time, integrated hydroelectric photovoltaic has demonstrated ability charge commercial button‐type lithium batteries great success. current work combines tunable performance, providing alternative method high‐efficiency density.

Язык: Английский

---

Field-assisted conductive substrate sparks the redox kinetics of Co9S8 in Li- and Na-ion batteries

Journal of Energy Chemistry, Год журнала: 2023, Номер 87, С. 114 - 122

Опубликована: Авг. 9, 2023

Язык: Английский

---

Investigating the energy storage mechanism of modified PEDOT:PSS for enhanced electrochemical performance

Journal of Power Sources, Год журнала: 2024, Номер 603, С. 234444 - 234444

Опубликована: Апрель 2, 2024

Язык: Английский

---