Abstract
Crystalline and nanocrystalline NiSi2 were studied as negative electrode materials in Li cells. Crystalline NiSi2 was found to be inactive toward lithiation/delithiation. However, it was found that NiSi2 becomes active toward lithium when made nanocrystalline by ball milling. X-ray diffraction peaks from nanocrystalline NiSi2 disappear after the first lithiation process, confirming its electrochemical activity. In subsequent cycles, the voltage curve of nanocrystalline NiSi2 is similar to that of amorphous Si, excepting that there is significant depression of the lithiation potential, which may arise from internal stress.
| Original language | English |
|---|---|
| Pages (from-to) | A2456-A2460 |
| Journal | Journal of the Electrochemical Society |
| Volume | 163 |
| Issue number | 10 |
| DOIs | |
| State | Published - 2016 |
| Externally published | Yes |
Funding
The authors acknowledge funding from NSERC and 3 M Canada, Co. under the auspices of the Industrial Research Chair and Discovery grant programs. We also acknowledge the support of the Canada Foundation for Innovation, the Atlantic Innovation Fund and other partners that fund the Facilities for Materials Characterization managed by the Institute for Research in Materials. ZD acknowledges financial support from the Killam Trusts.
| Funders | Funder number |
|---|---|
| Atlantic Innovation Fund | |
| Institute for Research in Materials | |
| Natural Sciences and Engineering Research Council of Canada | |
| Canada Foundation for Innovation | |
| Killam Trusts |
