期刊
ACS APPLIED ENERGY MATERIALS
卷 2, 期 5, 页码 3035-3041出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b00443
关键词
aqueous battery; multivalent battery; organic electrode material; redox-active polymer; catechol polymer; catecholato-metal cation complex; electrochemistry; density functional theory
资金
- Spanish MINECO [MAT201S-64167-C2-1-R]
- Fonds de la Recherche Scientifique (FRS-FNRS, Belgium)
- TALENTO grant from Comunidad de Madrid [2017-T1/AMB-5264]
Organic electrode materials capable of reversible coordination/uncoordination of both mono- and multivalent ions in aqueous electrolytes are desired to develop safe, sustainable, and cost-effective water-based batteries. Here, we demonstrate the universality of bioinspired redox-active polymers bearing catechol pendants to reversibly coordinate/uncoordinate numerous cations including H+ and Li+ to Zn2+ and Al3+ with fast kinetics and ultralong cyclability. This unprecedented versatility is based on a catecholato-metal cation complex (Cat(2-)(mM(n+))) charge storage mechanism that dictates the overall electro-chemistry: formation of stronger complexes in M+ < M2+ < M3+ order resulted in a huge redox potential increment that might be used to tune the operating voltage of the battery.
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