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二维LiTi₂(PO₄)₃片用于增强的离子电池阳极

Yaxuan He¹, Zehao Zhang¹, Guolin Feng²

¹Ningxia Key Laboratory of Photovoltaic Materials, School of Materials and New Energy, Ningxia University, Yinchuan 750021, China.

|January 3, 2024

概括

模板合成的层状酸 (LTP) 片增强了离子电池阳极. 这种2D结构提高了Li+扩散和容量,为高性能离子电池提供了卓越的性能.

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 (LIB) 对于储能至关重要.
开发高容量阳极材料对于提高LIB性能至关重要.
现有的阳极材料在容量和循环稳定性方面面临挑战.

研究的目的:

使用模板方法合成层状酸 (LTP) 片.
为了研究状LTP作为LIBs的阳极材料的电化学特性.
为了比较板状LTP与颗粒状LTP在高容量应用中的性能.

主要方法:

模板辅助合成LiTi2 (((PO4) 3 (LTP) 片.使用模板辅助合成.
描述2D层结构和LTP的活性部位.
电化学测试,包括循环电压测量和静电充放电周期.
测量Li+扩散系数在片状和颗粒状LTP阳极中的测量.

主要成果:

与颗粒状LTP (5.01 × 10^-10 cm^2 s^-1) 相比,状LTP的Li+扩散系数 (3.12 × 10^-8 cm^2 s^-1) 显著更高.
片状LTP阳极提供高初始放电容量为986.8 mAh·g^-1在0.1 A·g^-1.
观察到卓越的循环稳定性,在100个循环后,叶片式LTP阳极保留了231.1 mAh·g^-1,性能优于颗粒式LTP.

结论:

状LTP的2D分层结构促进了Li+扩散动力学,并增加了电解质-电极接触面积.
状LTP显示出作为离子电池的高性能阳极材料的极佳潜力.
快速充放电性能和卓越的循环稳定性使状LTP成为下一代储能设备的有希望的候选者.

关键词:

阳极是一种极.Ti2 ((PO4)3) 3 的使用情况.离子电池是一种离子电池.纳西康类型的结构结构.

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