TY - JOUR
T1 - Zn Anode Surviving Extremely Corrosive Polybromide Environment with Alginate-Graphene Oxide Hydrogel Coating
AU - Lin, Shiyu
AU - Li, Minghao
AU - Wang, Guotao
AU - Wang, Chao
AU - Yang, Han
AU - Wang, Zhoulu
AU - Zhang, Yi
AU - Liu, Xiang
AU - Bae, Jinhye
AU - Wu, Yutong
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2024/4/11
Y1 - 2024/4/11
N2 - Zinc–bromine (Zn-Br) redox provides a high energy density and low-cost option for next-generation energy storage systems, and polybromide diffusion remains a major issue leading to Zn anode corrosion, dendrite growth, battery self-discharge and limited electrochemical performance. A dual-functional Alginate-Graphene Oxide (AGO) hydrogel coating is proposed to prevent polybromide corrosion and suppress dendrite growth in Zn–Br batteries through negatively charged carboxyl groups and enhanced mechanical properties. The battery with anode of plain zinc coated with AGO (Zn]AGO) survives a severely corrosive environment with higher polybromide concentration than usual without a membrane, and achieves 80 cycles with 100% Coulombic and 80.65% energy efficiencies, four times compared to plain Zn anode. The promising performance is comparable to typical Zn–Br batteries using physical membranes, and the AGO coating concept can be well adapted to various Zn–Br systems to promote their applications.
AB - Zinc–bromine (Zn-Br) redox provides a high energy density and low-cost option for next-generation energy storage systems, and polybromide diffusion remains a major issue leading to Zn anode corrosion, dendrite growth, battery self-discharge and limited electrochemical performance. A dual-functional Alginate-Graphene Oxide (AGO) hydrogel coating is proposed to prevent polybromide corrosion and suppress dendrite growth in Zn–Br batteries through negatively charged carboxyl groups and enhanced mechanical properties. The battery with anode of plain zinc coated with AGO (Zn]AGO) survives a severely corrosive environment with higher polybromide concentration than usual without a membrane, and achieves 80 cycles with 100% Coulombic and 80.65% energy efficiencies, four times compared to plain Zn anode. The promising performance is comparable to typical Zn–Br batteries using physical membranes, and the AGO coating concept can be well adapted to various Zn–Br systems to promote their applications.
KW - hydrogel
KW - membraneless battery
KW - polybromide corrosion
KW - zinc–bromine battery
UR - http://www.scopus.com/inward/record.url?scp=85182981002&partnerID=8YFLogxK
U2 - 10.1002/smll.202311510
DO - 10.1002/smll.202311510
M3 - 文章
C2 - 38267811
AN - SCOPUS:85182981002
SN - 1613-6810
VL - 20
JO - Small
JF - Small
IS - 15
M1 - 2311510
ER -