Polyanthraquinone as a Reliable Organic Electrode for Stable and Fast Lithium Storage. (28th September 2015)

• Record Type: Journal Article
• Authors: Song, Zhiping; Qian, Yumin; Gordin, Mikhail L.; Tang, Duihai; Xu, Terrence; Otani, Minoru; Zhan, Hui; Zhou, Haoshen; Wang, Donghai
• Is Part Of: Angewandte Chemie. Volume 127:Number 47(2015)
• Page Start: 14153
• Page End: 14157
• Publication Date: 2015-09-28
• Subjects: Anthrachinon -- Kathoden -- Lithiumbatterien -- Organische Elektrodenmaterialien -- Polymere; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201506673
• Languages: English
• ISSNs: 0044-8249

Abstract

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. Abstract : Keine Kompromisse : Eine reine Polymerelektrode aus Poly(1, 4‐anthrachinon) (P14AQ) wurde als Kathode für wiederaufladbare Lithiumbatterien verwendet (siehe Bild). Das Batterieelement zeigt außerordentliche Leistungsdaten mit einer hohen Zyklenstabilität (99.4 % Kapazitätsbehalt nach 1000 Zyklen) und schnellem Laden/Entladen (64 % Energiefreisetzung in nur 2 min).