Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4767709 | Electrochimica Acta | 2016 | 7 Pages |
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 gâ1 and the fourth discharge capacity was 526 mA h gâ1, whereas the discharge capacity of conventional non-templated β-Bi2O3 was only 299 mA h gâ1 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.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Zhen Li, Wei Zhang, Yueyue Tan, Jinbo Hu, Siyao He, Andreas Stein, Bohejin Tang,