Browse

Extremely high yield conversion from low-cost sand to high-capacity Si electrodes for Li-ion batteries

Cited 63 time in Web of Science Cited 65 time in Scopus
Issue Date
2014-11
Citation
Advanced Energy Materials, Vol.4 No.16, p. 1400622
Abstract
Although magnesiothermic reduction has attracted immense attention as a facile route for the fabrication of mass-scale Si nanostructures for high-capacity lithium-ion battery applications, its low conversion yield (<50%) and the discovery of a sustainable and low-cost precursor remain challenging. Here, an unprecedentedly high final conversion yield (>98%) of magnesiothermic reduction based on control of reaction pressure is reported. The successful use of sand as a nearly infinite and extremely low-cost source for the high-yield fabrication of nanostructured Si electrodes for Li-ion batteries is demonstrated. On the basis of a step-by-step analysis of the material's structural, morphological, and compositional changes, a two-step conversion reaction mechanism is proposed that can clearly explain the phase behavior and the high conversion yield. The excellent charge-discharge performance (specific capacities over 1500 mAh g(-1) for 100 cycles) of the hierarchical Si nanostructure suggests that this facile, fast, and high-efficiency synthesis strategy from ultralow-cost sand particles provides outstanding cost-effectiveness and possible scalability for the commercialization of Si electrodes for energy-storage applications.
ISSN
1614-6832
URI
https://hdl.handle.net/10371/165085
DOI
https://doi.org/10.1002/aenm.201400622
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Materials Science and Engineering (재료공학부)Journal Papers (저널논문_재료공학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse