Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7996512 | Journal of Alloys and Compounds | 2016 | 7 Pages |
Abstract
In this article, monocrystalline bundles and polycrystalline nanowires were synthesized using α-MnO2 and MnOOH as precursors via an in-situ reaction. The electrochemical properties of the resulting nanocrystals were investigated. Results reveal that the polycrystalline nanowires are more activated than the monocrystalline nanowires. The polycrystalline nanowires also deliver a maximum discharge capacity of 226 mA h/g at 10 mA/g. Compared with the linear charging plateau at >4.3 V in the monocrystalline bundles, the charging platues of (100) and (001) domains in the polycrystalline nanowires are 4.3-4.55 and 4.55-4.6 V, respectively. The high capacity and rate performance of the polycrystalline nanowires are attributed to their good electroconductivity and rapid Li+ diffusion, which originate from defects and small domains.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Meng Cheng, Kongjun Zhu, Lu Yang, Lei Zhu, Yong Li, Weiping Tang,