期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 18, 页码 15631-15637出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b02336
关键词
lithium ion batteries; organic frameworks; organic electrodes; triptycene; arylene diimides
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Toronto Connaught Foundation
- NSERC
Lithium ion batteries are the best commercial technology to satisfy the energy storage needs of current and emerging applications. However, the use of transition-metal-based cathodes precludes them from being low-cost, sustainable, and environmentally benign, even with recycling programs in place. In this study, we report a highly stable organic material that can be used in place of the transition-metal cathodes. By creating a three-dimensional framework based on triptycene and perylene diimide (PDI), a cathode can be constructed that mitigates stability issues that organic electrodes typically suffer from. When a lithium ion battery is assembled using the PDI triptycene framework (PDI Tc) cathode, a capacity of 75.9 mAh (78.7% of the theoretical value) is obtained. Importantly, the battery retains a near perfect Coulombic efficiency and >80% of its capacity after cycling 500 times, which is the best value reported to date for PDI-based materials.
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