Please use this identifier to cite or link to this item: https://doi.org/10.1038/nenergy.2017.74
Title: Reversible multi-electron redox chemistry of pi-conjugated N-containing heteroaromatic molecule-based organic cathodes
Authors: Peng, Chengxin 
Ning, Guo-Hong
Su, Jie 
Zhong, Guiming
Tang, Wei
Tian, Bingbing 
Su, Chenliang 
Yu, Dingyi 
Zu, Lianhai
Yang, Jinhu
Ng, Man-Fai 
Hu, Yong-Sheng
Yang, Yong
Armand, Michel
Loh, Kian Ping 
Keywords: Science & Technology
Technology
Energy & Fuels
Materials Science, Multidisciplinary
Materials Science
RAY PHOTOELECTRON-SPECTROSCOPY
LITHIUM-ION BATTERIES
HIGH-ENERGY DENSITY
ORBITAL METHODS
LOW-COST
BASIS-SETS
PERFORMANCE
SURFACE
ELECTROLYTE
SULFUR
Issue Date: 1-Jul-2017
Publisher: NATURE PUBLISHING GROUP
Citation: Peng, Chengxin, Ning, Guo-Hong, Su, Jie, Zhong, Guiming, Tang, Wei, Tian, Bingbing, Su, Chenliang, Yu, Dingyi, Zu, Lianhai, Yang, Jinhu, Ng, Man-Fai, Hu, Yong-Sheng, Yang, Yong, Armand, Michel, Loh, Kian Ping (2017-07-01). Reversible multi-electron redox chemistry of pi-conjugated N-containing heteroaromatic molecule-based organic cathodes. NATURE ENERGY 2 (7). ScholarBank@NUS Repository. https://doi.org/10.1038/nenergy.2017.74
Abstract: © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Even though organic molecules with well-designed functional groups can be programmed to have high electron density per unit mass, their poor electrical conductivity and low cycle stability limit their applications in batteries. Here we report a facile synthesis of π-conjugated quinoxaline-based heteroaromatic molecules (3Q) by condensation of cyclic carbonyl molecules with o-phenylenediamine. 3Q features a number of electron-deficient pyrazine sites, where multiple redox reactions take place. When hybridized with graphene and coupled with an ether-based electrolyte, an organic cathode based on 3Q molecules displays a discharge capacity of 395 mAh g-1 at 400 mA g-1 (1C) in the voltage range of 1.2-3.9 V and a nearly 70% capacity retention after 10,000 cycles at 8 A g-1. It also exhibits a capacity of 222 mAh g-1 at 20C, which corresponds to 60% of the initial specific capacity. Our results offer evidence that heteroaromatic molecules with multiple redox sites are promising in developing high-energy-density, long-cycle-life organic rechargeable batteries.
Source Title: NATURE ENERGY
URI: https://scholarbank.nus.edu.sg/handle/10635/172634
ISSN: 20587546
DOI: 10.1038/nenergy.2017.74
Appears in Collections:Staff Publications
Elements

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Reversible Multielectron Redox Chemistry Heteroaromatic Molecule-based Organic Cathodes.pdfPublished version1.47 MBAdobe PDF

CLOSED

None

SCOPUSTM   
Citations

132
checked on Nov 22, 2020

Page view(s)

52
checked on Nov 20, 2020

Download(s)

3
checked on Nov 20, 2020

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.