NDLI: Self-polymerized dopamine as an organic cathode for Li- and Na-ion batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Kim, Ki Chul Noda, Suguru Liu, Tianyuan Lee, Byeongyong Chen, Zhongming Jang, Seung Soon Lee, Seung Woo
Copyright Year	2017
Abstract	Self-polymerized dopamine is a versatile coating material that has various oxygen and nitrogen functional groups. Here, we demonstrate the redox-active properties of self-polymerized dopamine on the surface of few-walled carbon nanotubes (FWNTs), which can be used as organic cathode materials for both Li- and Na-ion batteries. We reveal the multiple redox reactions between self-polymerized dopamine and electrolyte ions in the high voltage region from 2.5 to 4.1 V vs. Li using both density functional theory (DFT) calculations and electrochemical measurements. Free-standing and flexible hybrid electrodes are assembled using a vacuum filtration method, which have a 3D porous network structure consisting of polydopamine coated FWNTs. The hybrid electrodes exhibit gravimetric capacities of ∼133 mA h g−1 in Li-cells and ∼109 mA h g−1 in Na-cells utilizing double layer capacitance from FWNTs and multiple redox-reactions from polydopamine. The polydopamine itself within the hybrid film can store high gravimetric capacities of ∼235 mA h g−1 in Li-cells and ∼213 mA h g−1 in Na-cells. In addition, the hybrid electrodes show a high rate-performance and excellent cycling stability, suggesting that self-polymerized dopamine is a promising cathode material for organic rechargeable batteries.
Starting Page	205
Ending Page	215
Page Count	11
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	10
Issue Number	1
Journal	Energy & Environmental Science
DOI	10.1039/c6ee02641a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Li Dopamine Oxygen Nitrogen Carbon nanotube Cathode Redox Electrolyte Density functional theory Electrochemistry Capacitance
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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