TY - JOUR
T1 - Alkali Adatom-amplified Schottky contact and built-in voltage for stable Zn-metal anodes
AU - Ardhi, Ryanda Enggar Anugrah
AU - Liu, Guicheng
AU - Park, Jihun
AU - Lee, Joong Kee
N1 - Funding Information:
This research was supported by the Brain Pool program funded by the Ministry of Science and ICT through the National Research Foundation of Korea ( 2019H1D3A1A01069779 ). This study was also supported by the KIST Institutional Program (2E31863, 2V09284). The authors thank Mr. Joo Man Woo (KIST) for technical support during the preparation of this study, and Dr. Cininta Anisa Savitri (KIST) for help in conducting the UV–Vis measurements.
Funding Information:
This research was supported by the Brain Pool program funded by the Ministry of Science and ICT through the National Research Foundation of Korea (2019H1D3A1A01069779). This study was also supported by the KIST Institutional Program (2E31863, 2V09284). The authors thank Mr. Joo Man Woo (KIST) for technical support during the preparation of this study, and Dr. Cininta Anisa Savitri (KIST) for help in conducting the UV–Vis measurements.
Publisher Copyright:
© 2022
PY - 2023/1
Y1 - 2023/1
N2 - Development of rechargeable Zn-metal batteries is limited by side reactions, dendrite growth, and low ion-diffusion kinetics on Zn-anodes. Herein, alkali-metal adatom-modified amorphous carbon cluster passivation films (CCF-Ms) were formed on Zn-anodes by radiofrequency plasma thermal evaporation and alkali-metal hydroxide treatment. Plasma energy and alkali-metal hydroxide adatoms develop p-type semiconducting property and chemical durability of the carbon film by inducing dangling bonds and O-containing functional groups, to form Schottky contact between CCF-M and Zn metal with significant Schottky barrier (ΦSB) and built-in voltage (Vbi). CCF-M, ΦSB, and Vbi effectively enhanced the corrosion resistance, dendrite suppression, and Zn2+-transport kinetics of the Zn-anode, respectively. Specifically, Zn2+ was guided to deposit rapidly and uniformly below CCF-M without dendrites and side reactions during over 5000 and 1302 cycles in symmetric cell at 1.0 and 10 mA cm−2, respectively, with a capacity retention of ∼83% after 5000 cycles at 1.0 A g−1V2O5 in Zn|V2O5 full cell.
AB - Development of rechargeable Zn-metal batteries is limited by side reactions, dendrite growth, and low ion-diffusion kinetics on Zn-anodes. Herein, alkali-metal adatom-modified amorphous carbon cluster passivation films (CCF-Ms) were formed on Zn-anodes by radiofrequency plasma thermal evaporation and alkali-metal hydroxide treatment. Plasma energy and alkali-metal hydroxide adatoms develop p-type semiconducting property and chemical durability of the carbon film by inducing dangling bonds and O-containing functional groups, to form Schottky contact between CCF-M and Zn metal with significant Schottky barrier (ΦSB) and built-in voltage (Vbi). CCF-M, ΦSB, and Vbi effectively enhanced the corrosion resistance, dendrite suppression, and Zn2+-transport kinetics of the Zn-anode, respectively. Specifically, Zn2+ was guided to deposit rapidly and uniformly below CCF-M without dendrites and side reactions during over 5000 and 1302 cycles in symmetric cell at 1.0 and 10 mA cm−2, respectively, with a capacity retention of ∼83% after 5000 cycles at 1.0 A g−1V2O5 in Zn|V2O5 full cell.
KW - Amorphous carbon film
KW - Built-in voltage
KW - Dendrite-free Zn-metal anode
KW - Ion transport kinetics
KW - Schottky contact
KW - Semiconducting passivation layer
UR - http://www.scopus.com/inward/record.url?scp=85142457862&partnerID=8YFLogxK
U2 - 10.1016/j.ensm.2022.11.031
DO - 10.1016/j.ensm.2022.11.031
M3 - Article
AN - SCOPUS:85142457862
SN - 2405-8297
VL - 54
SP - 863
EP - 874
JO - Energy Storage Materials
JF - Energy Storage Materials
ER -
