Mn掺杂铁酸铋纳米颗粒的制备及其电化学储能应用

Preparation of Mn doped bismuth ferrite nanoparticles and its application in electrochemical energy storage

侧重探究了锂离子电池中Mn掺杂铁酸铋(BiFe_(1-x)Mn_(x)O_(3))的应用.研究发现,采用溶胶-凝胶法制备的BiFe_(1-x)Mn_(x)O_(3)纳米颗粒作为正极,相比纯相BiFeO_(3)纳米颗粒,其尺寸更小,在锂电池中使用可以有效缓解体积膨胀的问题,并提升循环稳定性.X射线衍射和扫描电镜结果显示,掺杂Mn离子会导致晶格结构畸变.通过组装成扣式电池并测试其电化学性能,发现掺杂后的BiFe_(1-x)Mn_(x)O_(3)正极表现出比纯相BiFeO_(3)更优异的电化学反应.这项研究为推动商业化锂离子电池正极材料中铁酸铋的应用提供了技术支持.

The focus of this study is on the application of Mn-doped bismuth ferrite(BiFe_(1-x)Mn_(x)O_(3))in lithium-ion batteries.It has been observed that sol-gel synthesized BiFe_(1-x)Mn_(x)O_(3)nanoparticles as positive electrodes exhibit smaller sizes compared to pure phase BiFeO_(3)nanoparticles,effectively mitigating volume expansion and enhancing cycle stability when utilized in lithium batteries.X-ray diffraction and scanning electron microscopy analyses reveal the lattice structure distortion induced by Mn ion doping.Furthermore,BiFe_(1-x)Mn_(x)O_(3)electrodes,assembling in a button cell and testing the electrochemical performance,demonstrate the superior electrochemical reactivity over pure BiFeO_(3)counterpart.This research provides scientific evidence supporting the advancement of bismuth ferrite s application as a positive electrode material for commercial lithium-ion batteries.