Electrochemical characteristics of single crystalline nanowires and their driven mechanism |
| |
Authors: | Han-Kyu Seong Myeong-Ha Kim Heon-Jin Choi Young-Jin Choi Jae-Gwan Park |
| |
Affiliation: | (1) School of Advanced Materials Science and Engineering, Yonsei University, 134, Sinchon-dong, Seodaemun-gu, 120-749 Seoul, Korea;(2) Nano Materials Research Center, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Seongbuk-gu, 136-650 Seoul, Korea |
| |
Abstract: | The electrochemical characteristics of single crystalline SnO2, ZnO and Si nanowires and their driven mechanism are reported as nanostructural anode materials. As intercalation and deintercalation of Li, Si nanowires are converted to amorphous phases of shorter wire shapes caused by the lattice expansion of the single crystalline Si, resulting in the fading of discharge capacity, although the reversible capacity (2500 mAh/g) in the first cycle is very high. However, oxide nanowries (SnO2 and ZnO) are transformed from a single crystalline structure into a polycrystalline form consisting of nano-sized metallic particles and Li2O crystals within the wires, which maintain their discharge capacity. The results of this study imply that the large surface area and high electrochemical activity of nanowires and nano-sized polycrystalline particles can provide a method to develop a new class of one-dimensional anode nanostructures in lithium-ion rechargeable batteries. |
| |
Keywords: | nanowires energy conversion lithium secondary battery |
本文献已被 SpringerLink 等数据库收录! |
|