Silicon/Carbon Nanotube/BaTiO3 Nanocomposite Anode: Evidence for Enhanced Lithium-Ion Mobility Induced by the Local Piezoelectric Potential

被引：100

作者：

Lee, Byoung-Sun ^{[1
]}

Yoon, Jihyun ^{[3
,4
]}

Jung, Changhoon ^{[2
]}

Kim, Dong Young ^{[1
]}

Jeon, Seung-Yeol ^{[3
,4
]}

Kim, Ki-Hong ^{[2
]}

Park, Jun-Ho ^{[1
]}

Park, Hosang ^{[1
]}

Lee, Kang Hee ^{[1
]}

Kang, Yoon-Sok ^{[1
]}

Park, Jin-Hwan ^{[1
]}

Jung, Heechul ^{[1
]}

Yu, Woong-Ryeol ^{[3
,4
]}

Doo, Seok-Gwang ^{[1
]}

机构：

[1] Samsung Adv Inst Technol, Energy Mat Lab, 130 Samsung Ro, Suwon 443803, Gyeonggi Do, South Korea

[2] Samsung Adv Inst Technol, Analyt Engn Grp, 130 Samsung Ro, Suwon 443803, Gyeonggi Do, South Korea

[3] Seoul Natl Univ, Dept Mat Sci & Engn, Nano & Smart Composite Mat Lab, 1 Gwanangno, Seoul 151742, South Korea

[4] Seoul Natl Univ, Res Inst Adv Mat, 1 Gwanangno, Seoul 151742, South Korea

来源：

ACS NANO | 2016年 / 10卷 / 02期

关键词：

silicon anode; large volume expansion; piezoelectric particle; local electric potential; Li-ion mobility; PHASE-TRANSFORMATION; CARBON NANOFIBERS; ENERGY-CONVERSION; BATTERY ANODES; CAPACITY; PERFORMANCE; NANOGENERATOR; NANOPARTICLES; FABRICATION; COMPOSITES;

D O I：

10.1021/acsnano.5b07674

中图分类号：

O6 [化学];

学科分类号：

0703 ;

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.

引用

页码：2617 / 2627

页数：11

共 49 条

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