| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Functional Defects in Electroceramic Materials
|
| Presentation Title |
Irradiation-enhanced Electrochemical Performance of TiO2 Anode Material |
| Author(s) |
Janelle P. Wharry, Chao Yang, Tristan Olsen, Hui (Claire) Xiong, Kassiopeia A. Smith, Yongqiang Wang, Khalid Hattar, Yaqiao Wu, Dmitri Tenne, Sheng Cheng |
| On-Site Speaker (Planned) |
Janelle P. Wharry |
| Abstract Scope |
The objective of this study is to understand the effect of irradiation-induced defects on electrochemical charge storage capacity in TiO2 electrodes. Cation defects in metal oxide anodes for lithium-ion batteries are known to increase the extent of Li intercalation, and thus increase the charge storage capacity. Here, we utilize irradiation to intentionally produce defects in TiO2 metal oxide anode. We conduct room-temperature Nb ion irradiations on rutile [100] TiO2 single crystals, then subsequently carry out lithiation. Li pickup is enhanced along irradiation damage tracks and at the Nb ion implantation peak. We also observe irradiation-enhanced electrochemical cycling in both anatase and amorphous TiO2 nanotubes. This improved performance is attributed to irradiation-induced defects and disordering in the anatase tubes, and irradiation-induced crystallization in the amorphous nanotubes. These results are discussed in the context of irradiation-induced order/disorder transformations. |