TY - JOUR
T1 - Analysis of the behavior of Zn atoms with a Pb additive on the surface during Zn electrodeposition
AU - Onabuta, Yusuke
AU - Kunimoto, Masahiro
AU - Ono, Fumimasa
AU - Fukunaka, Yasuhiro
AU - Nakai, Hiromi
AU - Zangari, Giovanni
AU - Homma, Takayuki
N1 - Funding Information:
This work is financially supported in part by Grant-in-Aid for Scientific Research (JP21H01642), MEXT, Japan. The collaboration is the direct result of the Top Global University Project from MEXT. Y. O. thanks for the support by Grant-in-Aid for Japan Society for the Promotion of Science (JSPS) Fellows (JP20J23239), MEXT.
Publisher Copyright:
© 2022
PY - 2022/5
Y1 - 2022/5
N2 - Zn has attracted considerable attention as an effective anode material in post-Li secondary batteries for large-scale, next-generation energy storage. The use of metal additives such as Pb is effective in suppressing undesirable morphological changes in the electrode during charging. More efficient additives can be obtained by investigating the behavior of deposited Zn in the presence of Pb at the atomic level. This study investigates the morphological and structural characteristics of Zn electrodeposition with the addition of Pb. Galvanostatic electrodeposition indicates that distinctive pillar-like Zn grows in the presence of Pb, which is oriented to (0001) in the hexagonal close-packed (hcp) structure, with its side wall oriented toward the hcp-(0–110) structure. The electrodeposited Zn is covered by a top layer of Pb(1 1 1). Density functional theory calculations confirm this layer structure by showing that the deposited Zn atoms can penetrate the Pb top layer to reach the Zn underlayer as a surfactant. This feature allows pillars to grow continuously. Understanding the behavior of such deposited atoms also provides insights into the effects and working mechanisms of additives in general.
AB - Zn has attracted considerable attention as an effective anode material in post-Li secondary batteries for large-scale, next-generation energy storage. The use of metal additives such as Pb is effective in suppressing undesirable morphological changes in the electrode during charging. More efficient additives can be obtained by investigating the behavior of deposited Zn in the presence of Pb at the atomic level. This study investigates the morphological and structural characteristics of Zn electrodeposition with the addition of Pb. Galvanostatic electrodeposition indicates that distinctive pillar-like Zn grows in the presence of Pb, which is oriented to (0001) in the hexagonal close-packed (hcp) structure, with its side wall oriented toward the hcp-(0–110) structure. The electrodeposited Zn is covered by a top layer of Pb(1 1 1). Density functional theory calculations confirm this layer structure by showing that the deposited Zn atoms can penetrate the Pb top layer to reach the Zn underlayer as a surfactant. This feature allows pillars to grow continuously. Understanding the behavior of such deposited atoms also provides insights into the effects and working mechanisms of additives in general.
KW - First-principles calculation
KW - Pb additive
KW - Solid–liquid interface
KW - Zn electrodeposition
UR - http://www.scopus.com/inward/record.url?scp=85130117224&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85130117224&partnerID=8YFLogxK
U2 - 10.1016/j.elecom.2022.107291
DO - 10.1016/j.elecom.2022.107291
M3 - Article
AN - SCOPUS:85130117224
SN - 1388-2481
VL - 138
JO - Electrochemistry Communications
JF - Electrochemistry Communications
M1 - 107291
ER -