Memory effect highlighting in silicon anodes for high energy density lithium-ion batteries

作者：Ulldemolins Michel; Le Cras Frederic^*; Pecquenard Brigitte

来源：Electrochemistry Communications, 2013, 27: 22-25.

DOI：10.1016/j.elecom.2012.10.027

• Memory effect
• Silicon electrode
• Lithium-silicon alloys
• Li15Si4
• Lithium-ion batteries

A memory effect occurring on silicon electrodes during lithium insertion/deinsertion was revealed by means of electrochemical characterizations. The reversible capacity fading is triggered when the electrodes are cycled between Li-rich compositions, which are actually achieved in selected conditions (current density, voltage window, electrode thickness). It is correlated with a structural evolution of Li-rich alloys, i.e. the crystallization of Li15Si4 or the probable ordering of other Li-rich phases. It should be avoided in Li-ion practical cells by an appropriate cell design.

• 出版日期2013-2
• 单位中国地震局