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在NaTi₂(PO₄)₃纳米带中的氧气空缺,以提高Na储存的低温性能

Qin-Chao Wang¹, Zhaoquan Peng¹, Sha He¹

¹School of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting Road, Yangzhou City, Jiangsu Province 225002, China.

Journal of colloid and interface science

|March 30, 2025

概括

在酸纳米丝带中引入氧气空隙显著提高了在低温下离子电池的性能. 这种增强可以提高导电性和稳定性,从而可靠地储存寒冷天气的能量.

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:

酸 (NaTi2(PO4) 3) 是离子电池 (SIB) 的一个有前途的阳极材料.
它的实际用途受到电导率差的限制,特别是在低温下.
探索氧气空缺 (VO) 以克服这些局限性.

研究的目的:

为了提高NaTi2(PO4)3纳米带的低温储性能.
研究氧气空缺在提高导电性和稳定性方面的作用.
评估材料在寒冷环境中对SIB的潜力.

主要方法:

合成具有受控氧空位的NaTi2(PO4) 3纳米带 (NTP-2).
使用X射线衍射与瑞特维尔德精细化,电子磁共振和X射线光电子光谱学进行表征.
在低温 (-20°C) 下对阳极性能进行电化学测试.

主要成果:

在NTP-2中,氧气空缺的度最高,它是TiO6八面体和PO4四面体之间的桥梁.
氧气空缺使Na+迁移能量屏障降低到0.40 eV,增强了离子导电性.
在300个循环后,NTP-2阳极在-20°C下保持了96.1%的容量 (106.1 mAh g-1).
一个完整的电池在-20°C下表现稳定,在250个循环后保持64 mAh g-1.

结论:

将氧气空缺引入NaTi2(PO4) 3纳米丝带可以显著提高电子和离子导电性.
优化的材料表现出SIB的优异低温性能.
这种方法为开发用于寒冷气候应用的高性能SIB提供了可行的策略.

关键词:

阳极是一种极.低温低温的低温是什么意思纳提 (NaTi) (PO) (PO) (PO) (PO) (PO) (NaTi) (PO) (PO) (PO) (NaTi) (NaTi) (NaTi) (PO) (PO) (PO) (NaTi) (NaTi) (NaTi) (NaTi) (NaTi) (NaTi) (NaTi) (PO) (PO) (PO) (PO) (PO) (NaTi) (NaTi) (NaTi) (NaTi) (NaTi) (PO) (PO) (PO) (PO) () () () () () () () () () ) ()空缺的氧气位离子电池是一种离子电池.

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