Abstract
Herein, hierarchically structured SnO2 microspheres are designed and synthesized as an efficient anode material for lithium-ion batteries using hollow SnO2 nanoplates. Three-dimensionally ordered macroporous (3-DOM) SnOx-C microspheres synthesized by spray pyrolysis are transformed into hierarchically structured SnO2 microspheres by a two-step post-treatment process. Sulfidation produces hierarchically structured SnS-SnS2-C microspheres comprising tin sulfide nanoplate and carbon building blocks. A subsequent oxidation process produces SnO2 microspheres from hollow SnO2 nanoplate building blocks, which are formed by Kirkendall diffusion. The discharge capacity of the hierarchically structured SnO2 microspheres at a current density of 5 A·g−1 for the 600th cycle is 404 mA·h·g−1. The hierarchically structured SnO2 microspheres have reversible discharge capacities of 609 and 158 mA·h·g−1 at current densities of 0.5 and 30 A·g−1, respectively. The ultrafine nanosheets contain empty voids that allow excellent lithium-ion storage performance, even at high current densities. [Figure not available: see fulltext.].
Original language | English |
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Pages (from-to) | 1301-1312 |
Number of pages | 12 |
Journal | Nano Research |
Volume | 11 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2018 Mar 1 |
Keywords
- Kirkendall diffusion
- lithium-ion battery
- nanoplate
- spray pyrolysis
- tin oxide
ASJC Scopus subject areas
- Materials Science(all)
- Electrical and Electronic Engineering