Electronic Transport Properties of Carbon‐Encapsulated Maricite NaFePO4 as Cathode Material for Sodium‐Ion Batteries DOI

Krishna Dagadkhair,

Pratiksha Pawar,

S. Rajendran Pillai

и другие.

Advanced Sustainable Systems, Год журнала: 2025, Номер unknown

Опубликована: Июнь 1, 2025

Abstract Electronic transport properties, with detailed dielectric behavior over a wide temperature (123 K – 523 K) and frequency (0.1 Hz 10 MHz) range of maricite NaFePO 4 (NFP) carbon‐coated (NFP@C) as cathode material for Na‐ion batteries are reported. For this, pure phase NFP is synthesized via an ultrasound‐assisted sol‐gel route, calcination at 600 °C 5 h in N 2 atmosphere. The studies revealed very high constant (ɛ r ′) values (10 < ɛ ′ 3 ), non‐ideal Debye‐like relaxation frequency. imaginary part the ″) demonstrated that conductivity major contributor to overall loss sample. frequency‐dependent ac (σ ) response −4 S cm −1 σ resulting from long‐range hopping charge carriers T 300 re‐orientational, localized > K. Activation energy 35 meV 56 found separating this transition range. Further, preliminary electrochemical performance these samples evaluated half‐cell configuration, revealing specific capacity 14 mAh g 18.11 NFP@C samples.

Язык: Английский

Research progress in sodium-iron-phosphate-based cathode materials for cost-effective sodium-ion batteries: Crystal structure, preparation, challenges, strategies, and developments DOI

M. Kouthaman,

R.A. Arul Raja,

Dongwoo Shin

и другие.

Progress in Materials Science, Год журнала: 2024, Номер unknown, С. 101425 - 101425

Опубликована: Дек. 1, 2024

Язык: Английский

Процитировано

9
Recycling of Spent Lithium Iron Phosphate Cathodes: Challenges and Progress DOI
Hao Yao, Yuhui Zhang, Gaoliang Yang

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown

Опубликована: Сен. 16, 2024

The number of spent lithium iron phosphate (LiFePO

Язык: Английский

Процитировано

8
Hollow spherical Na3.95Fe2.95V0.05(PO4)2P2O7 suppressing inactive Maricite-NaFePO4 with ultrahigh dynamics performance DOI

Shunjie Xu,

Jiashu Yuan, Denghui Ma

и другие.

Nano Energy, Год журнала: 2024, Номер unknown, С. 110404 - 110404

Опубликована: Окт. 1, 2024

Язык: Английский

Процитировано

5
Mg‐O Bond Enables Fast Sodium‐Ion Insertion/Extraction in Fe0.97Mg0.03PO4: Achieving Low Voltage Hysteresis and High‐Capacity Cathodes DOI
Mengting Deng, Yuan Yu,

Yian Wang

и другие.

Batteries & Supercaps, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Abstract Olivine‐type FePO 4 garner significant research interest due to its remarkable sodium storage capacity of 177.70 mAh g −1 and an appropriate discharge voltage 2.8 V. However, existing synthesis methods often require complex processes or toxic raw materials, which hinder further development. Additionally, hysteresis, resulting from volume mismatches during phase transitions in the Na + insertion/extraction process, decreases energy density. To overcome these issues, this study utilizes environmentally friendly cost‐effective aqueous ion exchange method, incorporating a small amount Mg 2+ . The effect caused by doping stabilizing Mg−O bonds alleviate hysteresis phenomenon. Kinetic analysis reveals that widens transport channels, with Fe 0.97 0.03 PO /C exhibiting highest diffusion. Furthermore, DFT uncovers changes band gap electrostatic field around MO 6 octahedra, elucidating improved conductivity kinetic. demonstrates satisfactory initial (170.54 at 0.2 C) excellent rate performance (80.60 5 C), maintaining specific 86.39 after 300 cycles 2 C rate. This approaches new direction presents novel strategy for advancing modification high‐performance /NaFePO

Язык: Английский

Процитировано

0
Electronic Transport Properties of Carbon‐Encapsulated Maricite NaFePO4 as Cathode Material for Sodium‐Ion Batteries DOI

Krishna Dagadkhair,

Pratiksha Pawar,

S. Rajendran Pillai

и другие.

Advanced Sustainable Systems, Год журнала: 2025, Номер unknown

Опубликована: Июнь 1, 2025

Abstract Electronic transport properties, with detailed dielectric behavior over a wide temperature (123 K – 523 K) and frequency (0.1 Hz 10 MHz) range of maricite NaFePO 4 (NFP) carbon‐coated (NFP@C) as cathode material for Na‐ion batteries are reported. For this, pure phase NFP is synthesized via an ultrasound‐assisted sol‐gel route, calcination at 600 °C 5 h in N 2 atmosphere. The studies revealed very high constant (ɛ r ′) values (10 < ɛ ′ 3 ), non‐ideal Debye‐like relaxation frequency. imaginary part the ″) demonstrated that conductivity major contributor to overall loss sample. frequency‐dependent ac (σ ) response −4 S cm −1 σ resulting from long‐range hopping charge carriers T 300 re‐orientational, localized > K. Activation energy 35 meV 56 found separating this transition range. Further, preliminary electrochemical performance these samples evaluated half‐cell configuration, revealing specific capacity 14 mAh g 18.11 NFP@C samples.

Язык: Английский

Процитировано

0