Catechol‐Mediated Reversible Binding of Multivalent Cations in Eumelanin Half‐Cells
- 25 August 2014
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 26 (38), 6572-6579
- https://doi.org/10.1002/adma.201402295
Abstract
Electrochemical storage systems that utilize divalent cations such as Mg2+ can improve the volumetric charge storage capacities compared to those that use monovalent ions. Here, a cathode based on naturally derived melanin pigments is used in secondary Mg2+ batteries. Redox active catechol groups in melanins permit efficient and reversible exchange of divalent Mg2+ cations to preserve charge storage capacity in biopolymer cathodes for more than 500 cycles.Keywords
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