TY - JOUR
T1 - Single-Ion Conducting Double-Network Hydrogel Electrolytes for Long Cycling Zinc-Ion Batteries
AU - Chan, Cheuk Ying
AU - Wang, Ziqi
AU - Li, Yangling
AU - Yu, Hui
AU - Fei, Bin
AU - Xin, John H.
N1 - Funding Information:
We thank the support of General Research Fund PolyU152156/17E from Hong Kong Research Grant Council and the project Study of Wearable Green Smart and Health Related Textile Materials (P0030178) from Guangdong-Hong Kong Joint Laboratory for New Textile Materials, Wuyi University, China.
Publisher Copyright:
© 2021 American Chemical Society. All rights reserved.
PY - 2021/7/7
Y1 - 2021/7/7
N2 - As one of the promising alternatives of lithium-ion batteries, zinc-ion batteries (ZIBs) have received growing interest from researchers due to their good safety, eco-friendliness, and low cost. Nevertheless, aqueous ZIBs are still a step away from practical applications due to the nonuniform deposition of Zn and parasitic side reactions, which cause capacity fading and even short circuit. To tackle these problems, here we introduce a single-Zn-ion conducting hydrogel electrolyte (SIHE), P(ICZn-AAm), synthesized with iota carrageenan (IC) and acrylamide (AAm). The SIHE manifests single Zn2+ conductivity via the abundant sulfates fixed on the IC polymer backbone, delivering a high Zn2+ transference number of 0.93. It also exhibits outstanding ionic conductivity of 2.15 × 10-3 S cm-1 at room temperature. The enhanced compatibility at the electrode-electrolyte interface was verified by the stable Zn striping/plating performance along with a homogenous and smooth Zn deposition layer. It is also found that the passivation of the Zn anode can be effectively prohibited due to the lack of free anions in the electrolyte. The practical performance of the SIHE is further investigated with Zn-V2O5 batteries, which showed a stable capacity of 271.6 mA h g-1 over 150 cycles at 2 C and 127.5 mA h g-1 over 500 cycles at 5 C.
AB - As one of the promising alternatives of lithium-ion batteries, zinc-ion batteries (ZIBs) have received growing interest from researchers due to their good safety, eco-friendliness, and low cost. Nevertheless, aqueous ZIBs are still a step away from practical applications due to the nonuniform deposition of Zn and parasitic side reactions, which cause capacity fading and even short circuit. To tackle these problems, here we introduce a single-Zn-ion conducting hydrogel electrolyte (SIHE), P(ICZn-AAm), synthesized with iota carrageenan (IC) and acrylamide (AAm). The SIHE manifests single Zn2+ conductivity via the abundant sulfates fixed on the IC polymer backbone, delivering a high Zn2+ transference number of 0.93. It also exhibits outstanding ionic conductivity of 2.15 × 10-3 S cm-1 at room temperature. The enhanced compatibility at the electrode-electrolyte interface was verified by the stable Zn striping/plating performance along with a homogenous and smooth Zn deposition layer. It is also found that the passivation of the Zn anode can be effectively prohibited due to the lack of free anions in the electrolyte. The practical performance of the SIHE is further investigated with Zn-V2O5 batteries, which showed a stable capacity of 271.6 mA h g-1 over 150 cycles at 2 C and 127.5 mA h g-1 over 500 cycles at 5 C.
KW - gel-polymer electrolytes
KW - hydrogels
KW - single-ion conductors
KW - zinc dendrites
KW - zinc-ion batteries
UR - http://www.scopus.com/inward/record.url?scp=85110406124&partnerID=8YFLogxK
U2 - 10.1021/acsami.1c05941
DO - 10.1021/acsami.1c05941
M3 - Journal article
AN - SCOPUS:85110406124
SN - 1944-8244
VL - 13
SP - 30594
EP - 30602
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 26
ER -