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Polyanthraquinone as a Reliable Organic Electrode for Stable and Fast Lithium Storage
Author(s) -
Song Zhiping,
Qian Yumin,
Gordin Mikhail L.,
Tang Duihai,
Xu Terrence,
Otani Minoru,
Zhan Hui,
Zhou Haoshen,
Wang Donghai
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201506673
Subject(s) - electrode , lithium (medication) , anthraquinone , cycling , energy storage , materials science , cathode , chemical engineering , analytical chemistry (journal) , chemistry , organic chemistry , thermodynamics , physics , engineering , medicine , power (physics) , archaeology , history , endocrinology
Abstract In spite of recent progress, there is still a lack of reliable organic electrodes for Li storage with high comprehensive performance, especially in terms of long‐term cycling stability. Herein, we report an ideal polymer electrode based on anthraquinone, namely, polyanthraquinone (PAQ), or specifically, poly(1,4‐anthraquinone) (P14AQ) and poly(1,5‐anthraquinone) (P15AQ). As a lithium‐storage cathode, P14AQ showed exceptional performance, including reversible capacity almost equal to the theoretical value (260 mA h g −1 ; >257 mA h g −1 for AQ), a very small voltage gap between the charge and discharge curves (2.18–2.14=0.04 V), stable cycling performance (99.4 % capacity retention after 1000 cycles), and fast‐discharge/charge ability (release of 69 % of the low‐rate capacity or 64 % of the energy in just 2 min). Exploration of the structure–performance relationship between P14AQ and related materials also provided us with deeper understanding for the design of organic electrodes.