材料科学
压电
纳米复合材料
阳极
碳纳米管
硅
纳米技术
纳米颗粒
锂(药物)
电化学
复合材料
化学工程
光电子学
电极
化学
物理化学
内分泌学
工程类
医学
作者
Byoung‐Sun Lee,Jihyun Yoon,Changhoon Jung,Dong Young Kim,Seung‐Yeol Jeon,Ki‐Hong Kim,Jun‐Ho Park,Ho Seok Park,Kang Hee Lee,Yoon‐Sok Kang,Jin-Hwan Park,Heechul Jung,Woong‐Ryeol Yu,Seok‐Gwang Doo
出处
期刊:ACS Nano
[American Chemical Society]
日期:2016-01-27
卷期号:10 (2): 2617-2627
被引量:97
标识
DOI:10.1021/acsnano.5b07674
摘要
We report on the synergetic effects of silicon (Si) and BaTiO3 (BTO) for applications as the anode of Li-ion batteries. The large expansion of Si during lithiation was exploited as an energy source via piezoelectric BTO nanoparticles. Si and BTO nanoparticles were dispersed in a matrix consisting of multiwalled carbon nanotubes (CNTs) using a high-energy ball-milling process. The mechanical stress resulting from the expansion of Si was transferred via the CNT matrix to the BTO, which can be poled, so that a piezoelectric potential is generated. We found that this local piezoelectric potential can improve the electrochemical performance of the Si/CNT/BTO nanocomposite anodes. Experimental measurements and simulation results support the increased mobility of Li-ions due to the local piezoelectric potential.
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