在Na4Fe3(PO4)2P2O7阴极中通过氧空隙调节加速电化学动力,用于宽温度Ah级离子电池
Lei Ran1,2, Bolei Shen3, Liang Yue4
1School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China.
Angewandte Chemie (International ed. in English)
|January 19, 2026
概括
氧气空隙通过提高相纯度和导电性来提高离子电池阴极性能. 这种缺陷工程策略提高了实际应用的能量储存和电池寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 离子电池 (SIB) 是离子电池的一个有希望的替代品.
- Na4Fe3(PO4)2P2O7 (NFPP) 是一种潜在的阴极材料,但它存在杂质阶段和导电性差.
- 由于合成的挑战和固有的材料特性,NFPP的商业化受到限制.
研究的目的:
- 通过缺陷工程来提高NFPP阴极的电化学动力学.
- 为了提高NFPP中的相纯度,电子导电性和Na+扩散.
- 为NFPP展示一个可扩展和具有成本效益的合成路线.
主要方法:
- 通过缺陷工程控制氧气空缺的形成.
- 多尺度表征技术,以确认结构和电化学改进.
- 使用砂磨砂辅助喷雾干燥进行千克级合成.
主要成果:
- 优化的Na4Fe2.79(PO4)2P2O7 (NFPP-2.79) 显示了相纯度和导电性的改善.
- 在10°C下,NFPP-2.79提供了89.51 mAh的g-1,具有出色的循环稳定性 (在2°C下1500个循环后保持96.42%).
- 艾哈水平的囊细胞表现出高速率能力,长期循环能力 (在3000个循环后保持75.63%) 和卓越的安全性.
结论:
- 氧空位调制是推进聚离子阴极的有效策略.
- NFPP-2.79显示出实际应用离子电池的潜力.
- 可扩展的合成和强大的电化学性能为商业可行性铺平了道路.
关键词:
在天主教堂 (Cathode) 里.Na4Fe3(PO4)2P2O7O7是什么意思?Na4Fe3(PO4)2P2O7是什么意思?Na4Fe3是什么意思?Na4Fe3是什么意思?有一个空缺的氧气.一个袋子细胞.离子电池是一种离子电池.更多相关视频
相关概念视频
10:03Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
26.0K
We describe the use of synchrotron X-ray absorption spectroscopy (XAS) and X-ray diffraction (XRD) techniques to probe details of intercalation/deintercalation processes in electrode materials for Li-ion and Na-ion batteries. Both in situ and ex situ experiments are used to understand structural behavior relevant to the operation of...
26.0K
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
13.4K
Here, we describe protocols to prepare phosphonium-based ionic liquid and lithium bis(trifluoromethane)sulfonimide salt electrolytes, and assemble a non-flammable and high temperature functioning lithium-ion coin cell...
13.4K
Batteries and Fuel Cells
30.8K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
30.8K
10:41Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries
38.7K
Three-electrode cells are useful in studying the electrochemistry of lithium-ion batteries. Such an electrochemical setup allows the phenomena associated with the cathode and anode to be decoupled and examined independently. Here, we present a guide for construction and use of a three-electrode coin cell with emphasis on lithium plating...
38.7K
08:18Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery
11.9K
A protocol for the electrochemical testing of an aprotic Li-O2 battery with the preparation of electrodes and electrolytes and an introduction of the frequently used methods of characterization is presented here.
11.9K
06:44Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
3.7K
Oxide materials show many exotic properties that can be controlled by tuning the oxygen content. Here, we demonstrate the tuning of oxygen content in oxides by varying the pulsed laser deposition parameters and by performing postannealing. As an example, electronic properties of SrTiO3-based heterostructures are tuned by growth modifications and...
3.7K


