Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9803305 | Journal of Alloys and Compounds | 2005 | 6 Pages |
Abstract
The effect of ball-milling time on the overall electrochemical properties of LaMg11Ni + 200 wt% Ni composite has been studied systematically. The results show that ball-milling time has a striking effect on the overall electrochemical properties. The maximum discharge capacity increases first and then decreases with the increase of ball-milling time from 60 to 120 h, and the cycling stability is just on the contrary. The high-rate dischargeability increases a little with increasing ball-milling time. Detailed studies on the ball-milling time effect on the polarization resistance (Rp), the exchange current density (I0) and limiting current density (IL) indicate that the diffusion of hydrogen in the bulk of LaMg11Ni + 200 wt% Ni composite electrodes is the rate-determining factor for the discharge process of the alloy electrode.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Li Wang, Xinhua Wang, Lixin Chen, Changpin Chen, Qidong Wang,