Electrochemical reactivity of In-Pb solid solution as a negative electrode for rechargeable Mg-ion batteries

• 作者: Lucie Blondeau Suzy Surblé Eddy Foy Hicham Khodja Magali Gauthier
• 来源期刊: 能源化学
• 年，卷（期）: 2021,（4）
• 页码范围: 124-128
• 页数: 5页
• 语种: 英文

摘要

A composite In-Pb:carbon was successfully synthetized by a two-step mechanochemical synthesis in order to obtain an adequate particles size and structure to investigate the electrochemical reactivity of the In-Pb solid solution towards Mg.A potential synergetic coupling of electroactive elements In and Pb was examined using electrochemical and ex situ X-ray diffraction analyses.The potential profile of the solid solution indicates the formation of Mg2Pb and MgIn.However,the diffraction study suggests a peculiar electrochemically-driven amorphization of MgIn during the magnesiation,in strong contrast to MgIn crystallization in In-based and InBi-based electrodes reported in the literature.Combining In and Pb favors the amorphization of MgIn and a high first magnesiation capacity of about 550 mAh g-1,but is thereafter detrimental to the material's reversibility.These results emphasize the possible influ-ence of electrochemically-driven amorphization and crystallization processes on electrochemical perfor-mance of battery materials.