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ACS Appl Mater Interfaces. 2019 Aug 14;11(32):28801-28808. doi: 10.1021/acsami.9b06437. Epub 2019 Jul 30.

Conjugated Carbonyl Polymer-Based Flexible Cathode for Superior Lithium-Organic Batteries.

Li Q1, Li D1, Wang H1, Wang HG1,2, Li Y1, Si Z1, Duan Q1,2.

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School of Materials Science and Engineering , Changchun University of Science and Technology , Changchun 130022 , China.
Engineering Research Center of Optoelectronic Functional Materials , Ministry of Education , Changchun 130022 , China.


Conjugated carbonyl compounds are deemed as high theoretical capacity and green electrode materials for lithium-ion batteries (LIBs) but are limited by their high dissolution and poor electronic conductivity. In this paper, we have successfully synthesized a series of multicarbonyl conjugated polymers using the coupling polymerization reaction and then constructed carbonyl-conjugated polymer/carbon nanotube hybrid films by a vacuum-filtration method. Importantly, the hybrid films could serve as a flexible, binder-free, and free-standing organic cathode for LIBs, which could deliver a high reversible discharge capacity of 142.3 mAh g-1 at 50 mA g-1, good cycling stability with a capacity retention of 74.6% at 500 mA g-1 after 300 cycles, and excellent rate capability of 120.6 mAh g-1 at 1000 mA g-1. In addition, the theoretical calculation has proved that the symmetrical conjugated structure can well accommodate four Li+ ions during the electrochemical reaction. Interestingly, the assembled full cell and flexible battery can power the small devices, suggesting its potential to use in bendable or wearable energy-storages devices.


conjugated carbonyl polymer; coupling polymerization; flexible electrode; lithium-organic batteries; organic cathode materials


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