Liquid Metal-Modified Nanoporous SiGe Alloy as an Anode for Li-Ion Batteries and Its Self-Healing Performance

• DOI: 10.1021/acsaem.1c03204
• Publication Date: 2021-12-06T19:05:00Z
• Authors: Fanran Meng; Fuqiang Wang; Haohui Yu; Zijun Zhao; Yang Lv; Chao Ma; Dong Zhang; Xizheng Liu
• Keywords: Nanoporous

Alloy-type anodes have drawn considerable attention because of their potential applications in Li-ion batteries with high energy density. However, are still challenged by the dramatic volume change and side reactions at fresh surface alloy anodes. Herein, we proposed a liquid metal (LM)-modified nanoporous SiGe (NP-SiGe) that could accommodate electrode expansion repair surface. The difference between equilibrium lithiation/delithiation potentials Si Ge also mitigate instantaneous mechanical stress. Morphological structural characterization demonstrated nanocylated LM particles were successfully embedded within pore structure NP-SiGe. composite anode exhibits highly reversible Li storage performance room temperature −20 °C. In addition, it delivers capacity ∼1200 mA h g–1 after 300 cycles temperature, while retains ∼746.7 100 morphology cycled electrodes clearly demonstrates self-healing components. This study provides new perspectives on high-performance alloy-type anodes, especially for all-climate applications.