TY - JOUR
T1 - Copper Hexacyanoferrate Solid-State Electrolyte Protection Layer on Zn Metal Anode for High-Performance Aqueous Zinc-Ion Batteries
AU - Liu, Yu
AU - Li, Yuanxia
AU - Huang, Xiaomin
AU - Cao, Heng
AU - Zheng, Qiaoji
AU - Huo, Yu
AU - Zhao, Jingxin
AU - Lin, Dunmin
AU - Xu, Bingang
N1 - Funding Information:
This work was supported by Sichuan Science and Technology Program (2018JY0447) and the Research Grants Council of Hong Kong (RGC Postdoctoral Fellowship Scheme, Grant No.: PDFS2122‐5S03).
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/9/22
Y1 - 2022/9/22
N2 - Zinc (Zn) metal possesses broad prospects as an anode for aqueous zinc-ion batteries (AZIBs) due to its considerable theoretical capacity of 820 mAh g-1. However, the Zn anode suffers from dendrite growth and side reactions during Zn stripping/plating. Herein, a Prussian blue analog of copper hexacyanoferrate (CuHCF) with a 3D open structure and rich polar groups (CN) is coated on Zn foil as a solid-state electrolyte (SSE) protection layer to protect the Zn anode. The CuHCF protection layer possesses low activation energy of 26.49 kJ mol-1, the high ionic conductivity of 7.6 mS cm-1, and a large Zn2+ transference number of 0.74. Hence, the Zn@CuHCF||Zn@CuHCF symmetric cell delivers high cycling stability over 1800 h at 5 mA cm-2, an excellent depth of discharge of 51.3%, and the accumulative discharge capacity over 3000 mAh cm-2. In addition, the Zn//Ti@CuHCF asymmetric cell achieves the coulombic efficiency (CE) of 99.87% after 2000 cycles. More importantly, the Zn@CuHCF//V2O5 full cell presents outstanding capacity retention of 87.6% at 10 A g-1 after 3000 cycles. This work develops a type of material to form an artificial protection layer for high-performance AZIBs.
AB - Zinc (Zn) metal possesses broad prospects as an anode for aqueous zinc-ion batteries (AZIBs) due to its considerable theoretical capacity of 820 mAh g-1. However, the Zn anode suffers from dendrite growth and side reactions during Zn stripping/plating. Herein, a Prussian blue analog of copper hexacyanoferrate (CuHCF) with a 3D open structure and rich polar groups (CN) is coated on Zn foil as a solid-state electrolyte (SSE) protection layer to protect the Zn anode. The CuHCF protection layer possesses low activation energy of 26.49 kJ mol-1, the high ionic conductivity of 7.6 mS cm-1, and a large Zn2+ transference number of 0.74. Hence, the Zn@CuHCF||Zn@CuHCF symmetric cell delivers high cycling stability over 1800 h at 5 mA cm-2, an excellent depth of discharge of 51.3%, and the accumulative discharge capacity over 3000 mAh cm-2. In addition, the Zn//Ti@CuHCF asymmetric cell achieves the coulombic efficiency (CE) of 99.87% after 2000 cycles. More importantly, the Zn@CuHCF//V2O5 full cell presents outstanding capacity retention of 87.6% at 10 A g-1 after 3000 cycles. This work develops a type of material to form an artificial protection layer for high-performance AZIBs.
KW - copper hexacyanoferrate
KW - dendrite suppression
KW - protection layers
KW - zinc-ion batteries
KW - Zn anodes
UR - http://www.scopus.com/inward/record.url?scp=85136487607&partnerID=8YFLogxK
U2 - 10.1002/smll.202203061
DO - 10.1002/smll.202203061
M3 - Journal article
C2 - 35986433
AN - SCOPUS:85136487607
SN - 1613-6810
VL - 18
JO - Small
JF - Small
IS - 38
M1 - 2203061
ER -