In situ transmission electron microscopy observations of lithiation of spherical silicon nanopowder produced by induced plasma atomization

JOURNAL OF POWER SOURCES

卷:279

Article

Leblanc, Dominic^1,4  Wang, Chongmin²  He, Yang³  Belanger, Daniel⁴  Zaghib, Karim¹ 

[1] Hydroquebec Res Ctr IREQ, Varennes, PQ J3X 1S1, Canada

[2] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA

[3] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA

[4] Univ Quebec, Montreal, PQ H3C 3P8, Canada

关键词: Silicon nanopowder;    Anode;    Li-ion battery;    In situ TEM;    Plasma atomisation;   

DOI  :  10.1016/j.jpowsour.2014.12.060

来源: Elsevier

【 摘 要 】

Composite Li-ion anode can be fabricated using silicon nanopowders synthesized by induced plasma atomization. Properties of such nanopowder were characterized by physical and electrochemical methods. Primary particles were crystalline with spherical shape and the typical diameter ranging from 50 to 200 nm. The Si nanopowder showed a high gravimetric capacity (4900 mAh/g) at first discharge and around 12% irreversible loss of lithium. In addition, observations of a single silicon particle made by in situ TEM permitted to compare the volume change during lithiation with other silicon anode nanomaterials. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free