材料科学
箔法
电极
电池(电)
联轴节(管道)
锂(药物)
原位
复合材料
锂离子电池
表征(材料科学)
压力(语言学)
离子
纳米技术
热力学
物理化学
化学
哲学
功率(物理)
有机化学
内分泌学
物理
医学
语言学
作者
Hai-Na Chen,Na Li,Le Yang,Bin Liu,Wei‐Li Song,Haosen Chen
标识
DOI:10.1016/j.scriptamat.2021.114315
摘要
The electro-chemo-mechanical (ECM) coupling effects are nontrivial in alloying electrode materials, whose applications are hindered by the severe volume change during cycling. However, due to the difficulty in the in-situ application of mechanical load onto the active materials, these effects in many emerging lithium-ion battery (LIB) chemistries are largely unknown. Herein, we report a new setup for the in-situ characterizing ECM coupling effects in alloying electrode materials, and the coupling effects in aluminum (Al) foil electrode is studied. The elastic moduli of the Al foil show an increasing then slightly decreasing trend with the lithiation. Meanwhile, electrochemical impedance spectroscopy spectra of the Al foil imply an increasing surface atomistic energetic heterogeneity of the Al foil with the growing tensile force. Furthermore, the stress relaxation phenomena of the Al foil electrode during lithiation are observed. The newly developed setup opens a valuable window into investigating complicated ECM coupling effects in LIBs.
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