Abstract
This paper describes a modified colloidal crystal templating method to prepare three-dimensionally ordered macroporous (3DOM) β-Bi2O3. The 3DOM β-Bi2O3 materials exhibit higher specific capacities and better capacity retention than conventional β-Bi2O3 nanoparticles as anode materials for Li-ion batteries. The initial discharge capacity of 3DOM β-Bi2O3 was as high as 1296 mA h g−1 and the fourth discharge capacity was 526 mA h g−1, whereas the discharge capacity of conventional non-templated β-Bi2O3 was only 299 mA h g−1 after 4 cycles at a current rate of 0.2C. The improved electrochemical behavior of the 3DOM β-Bi2O3 electrodes is attributed to the 3DOM architecture, which provides easy access for Li+ ions to the surface of active material nanoparticles and short diffusion paths within the macropore walls, and also to the unique tunnel structure of β-Bi2O3.
Original language | English (US) |
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Pages (from-to) | 103-109 |
Number of pages | 7 |
Journal | Electrochimica Acta |
Volume | 214 |
DOIs | |
State | Published - Oct 1 2016 |
Bibliographical note
Publisher Copyright:© 2016 Elsevier Ltd
Keywords
- -BiO
- 3DOM &beta
- Colloidal crystal templating
- Li-ion battery