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一种新的NASICON型Na₃MnTi_0.5Zr_0.5PO₄)₃阴极材料,具有多价值的氧化还原反应,用于高性能离子电池

Kexin Rao¹, Yulei Sui¹, Mengting Deng¹

¹School of Iron and Steel, Soochow University, Suzhou 215000, China.

Journal of colloid and interface science

|September 19, 2024

概括

研究人员开发了一种新的阴极材料Na3MnTi0.5Zr0.5(PO4) 3 / C,以改进离子电池. 这种材料提高了导电性和稳定性,提高了性能,并使电池寿命更长.

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:

由于资源丰富,离子电池 (SIB) 对电网存储充满希望.
Na3MnZr(PO4)3是一种高电压的NASICON类型的阴极材料,但患有Jahn-Teller效应和较差导电性.
这些限制阻碍了SIB的利率能力和周期稳定性.

研究的目的:

为SIB开发一种新的阴极材料,以提高电化学性能.
通过引入多金属协同效应来解决Na3MnZr(PO4) 3的限制.
研究Ti替代对NASICON型材料结构和电化学性能的影响.

主要方法:

一种三元纳西康类材料的合成:Na3MnTi0.5Zr0.5(PO4) 3/C.
使用循环电压测量和恒流间歇定位等技术进行表征.
电化学性能评估,包括放电能力,速率能力和循环稳定性.

主要成果:

在Zr位置的Ti替代有效地减轻了Jahn-Teller效应,并增强了结构稳定性.
电极材料的电子导电性和Na+扩散系数得到了显著的改善.
Na3MnTi0.5Zr0.5(PO4) 3 / C在10C时具有71.0mAhg-1的高放电容量,在2C时1000次循环后保持78.8%的容量.

结论:

纳西康材料中的多金属协同效应可以显著提高电化学性能.
替代是一种可行的策略,可以克服SIBs的基阴极材料的局限性.
开发的Na3MnTi0.5Zr0.5(PO4) 3 / C材料显示出作为实用的离子电池应用中具有成本效益和高性能阴极的潜力.

关键词:

阴极材料的材料是正极材料.多个氧化还原反应.Na(3)MnTi(0.5)Zr(0.5)(PO(4))(3) 这是一个非常好的方法.离子电池是一种离子电池.固体相方法固体相方法

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