Yui Yuhki, Hayashi Masahiko, Nakamura Jiro
NTT Device Technology Labs., NTT Corporation 3-1, Morinosato Wakamiya, Atsugi-shi, Kanagawa Pref. 243-0198, Japan.
Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan.
Sci Rep. 2016 Mar 1;6:22406. doi: 10.1038/srep22406.
Electrochemical sodium deposition/dissolution behaviors in propylene carbonate-based electrolyte solution were observed by means of in situ light microscopy. First, granular sodium was deposited at pits in a sodium electrode in the cathodic process. Then, the sodium particles grew linearly from the electrode surface, becoming needle-like in shape. In the subsequent anodic process, the sodium dissolved near the base of the needles on the sodium electrode and the so-called "dead sodium" broke away from the electrode. The mechanisms of electrochemical sodium deposition and dissolution on a copper electrode were similar to those on the sodium electrode.
通过原位光学显微镜观察了碳酸丙烯酯基电解液中的电化学钠沉积/溶解行为。首先，在阴极过程中，颗粒状钠沉积在钠电极的凹坑处。然后，钠颗粒从电极表面线性生长，变成针状。在随后的阳极过程中，钠在钠电极上针状钠的基部附近溶解，所谓的“死钠”从电极上脱离。铜电极上电化学钠沉积和溶解的机制与钠电极上的相似。
