TY - JOUR
T1 - Polyacrylamide soft colloidal electrode for long-lasting aqueous Zn-I batteries
AU - Zhang, Kaiqiang
AU - Kong, Pei
AU - Wu, Chao
AU - Ma, Changlong
AU - Ye, Jilei
AU - Wu, Yuping
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/5/15
Y1 - 2025/5/15
N2 - Aqueous Zn-I batteries hold great potential for stationary energy storage applications. However, their development is challenged by limited device innovation, hindering improvements in long-term operation. In this study, we report an aqueous Zn-I battery design that leverages the water distribution control effect of sulfate ions (SO4)2−. Due to their strong water affinity compared to polyacrylamide (PAM), (SO4)2− ions induce phase separation of PAM from the aqueous electrolyte, preventing its dissolution. By introducing iodide species within the PAM soft colloid, we construct an aqueous Zn-I battery. Comprehensive electrochemical performance evaluations, including rate capability, cycling stability, fast-charging, fluctuating charge conditions, various states of charge, and self-discharge performance, demonstrate long-term cycling stability over 30,000 cycles with a 94.3% capacity retention. Moreover, we demonstrated its compatibility with practical solar panels, suggesting its potential for integration with sustainable energy resources in the future. This study provides solid innovation in advancing aqueous Zn-I battery technology.
AB - Aqueous Zn-I batteries hold great potential for stationary energy storage applications. However, their development is challenged by limited device innovation, hindering improvements in long-term operation. In this study, we report an aqueous Zn-I battery design that leverages the water distribution control effect of sulfate ions (SO4)2−. Due to their strong water affinity compared to polyacrylamide (PAM), (SO4)2− ions induce phase separation of PAM from the aqueous electrolyte, preventing its dissolution. By introducing iodide species within the PAM soft colloid, we construct an aqueous Zn-I battery. Comprehensive electrochemical performance evaluations, including rate capability, cycling stability, fast-charging, fluctuating charge conditions, various states of charge, and self-discharge performance, demonstrate long-term cycling stability over 30,000 cycles with a 94.3% capacity retention. Moreover, we demonstrated its compatibility with practical solar panels, suggesting its potential for integration with sustainable energy resources in the future. This study provides solid innovation in advancing aqueous Zn-I battery technology.
KW - Aqueous Zn-I battery
KW - Long-lasting performance
KW - Soft colloidal electrode
KW - Stationary energy storage
KW - Water distribution control
UR - http://www.scopus.com/inward/record.url?scp=105002684000&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2025.162685
DO - 10.1016/j.cej.2025.162685
M3 - 文章
AN - SCOPUS:105002684000
SN - 1385-8947
VL - 512
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 162685
ER -