Fayalite Fe₂SiO₄ is synthesized by the solid-state reaction without ball milling. The obtained powder is further structurally and electrochemically examined. Field emission scanning electron microscopy (FESEM) showed that microsized powder is obtained. X-ray powder diffraction (XRD) pattern is used for both phase identification and crystal structure Rietveld refinement. The structure is refined in the orthorhombic Pbnm space group. Mössbauer spectroscopy revealed traces of Fe³⁺ impurity. The bond valence mapping method is applied for the first time on Fe₂SiO₄ framework. It shows isolated, non-connected isosurfaces of constant E(Li), which further supports the assumptions of the conversion reactions. Electrochemical performances are investigated through galvanostatic cycling, cyclic voltammetry, and electrochemical impedance spectroscopy (EIS). Ex-situ XRD and Fourier transform infrared spectroscopy (FTIR) analyses are combined to monitor phase change after galvanostatic cycling and to reveal the working mechanism during electrochemical lithiation.

Fayalite Fe ₂ SiO ₄是通过固态反应合成的，无需球磨。获得的粉末进一步进行结构和电化学检查。场发射扫描电子显微镜(FESEM)显示获得微尺寸粉末。X 射线粉末衍射 (XRD) 图案用于相识别和晶体结构 Rietveld 精修。该结构在正交 P bnm空间群中进行了细化。穆斯堡尔光谱揭示了 Fe ³⁺杂质的痕迹。键价映射方法首次应用于 Fe ₂ SiO ₄框架。它显示了常数 E(Li) 的孤立的、非连接的等值面，这进一步支持了转化反应的假设。通过恒电流循环、循环伏安法和电化学阻抗谱 (EIS) 研究电化学性能。结合原位 XRD 和傅里叶变换红外光谱 (FTIR) 分析来监测恒电流循环后的相变并揭示电化学锂化过程中的工作机制。