Catechol-mediated reversible binding of multivalent cations in eumelanin half-cells

Young J.o. Kim; Wei Wu; Sang Eun Chun; Jay F. Whitacre; Christopher J. Bettinger

doi:10.1002/adma.201402295

Catechol-mediated reversible binding of multivalent cations in eumelanin half-cells

Young J.o. Kim, Wei Wu, Sang Eun Chun, Jay F. Whitacre, Christopher J. Bettinger

Carnegie Mellon University

Research output: Contribution to journal › Article › peer-review

129 Scopus citations

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.

Original language	English
Pages (from-to)	6572-6579
Number of pages	8
Journal	Advanced Materials
Volume	26
Issue number	38
DOIs	https://doi.org/10.1002/adma.201402295
State	Published - 1 Oct 2014

Keywords

batteries
biopolymers
electrochemical storage
magnesium
melanin

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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 = "batteries, biopolymers, electrochemical storage, magnesium, melanin",

author = "Kim, {Young J.o.} and Wei Wu and Chun, {Sang Eun} and Whitacre, {Jay F.} and Bettinger, {Christopher J.}",

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AU - Bettinger, Christopher J.

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AB - 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.

KW - batteries

KW - biopolymers

KW - electrochemical storage

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KW - melanin

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ER -

Catechol-mediated reversible binding of multivalent cations in eumelanin half-cells

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Keywords

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