Side‐Chain Engineering for High‐Performance Conjugated Polymer Batteries

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dc.citation.articleNumber2009263en_US
dc.citation.issueNumber14en_US
dc.citation.journalTitleAdvanced Functional Materialsen_US
dc.citation.volumeNumber31en_US
dc.contributor.authorLi, Xiaoyien_US
dc.contributor.authorLi, Yilinen_US
dc.contributor.authorSarang, Kasturien_US
dc.contributor.authorLutkenhaus, Jodieen_US
dc.contributor.authorVerduzco, Rafaelen_US
dc.date.accessioned2021-05-05T19:51:24Zen_US
dc.date.available2021-05-05T19:51:24Zen_US
dc.date.issued2021en_US
dc.description.abstractConjugated polymers are attractive for energy storage but typically require significant amounts of conductive additives to successfully operate with thin electrodes. Here, side‐chain engineering is used to improve the electrochemical performance of conjugated polymer electrodes. Naphthalene dicarboximide (NDI)‐based conjugated polymers with ion‐conducting ethylene glycol (EG) side chains (PNDI‐T2EG) and non‐ion‐conducting 2‐octyldodecyl side chains (PNDI‐T2) are synthesized, tested, and compared. For thick (20 µm, 1.28 mg cm−2) electrodes with a 60 wt% polymer, the PNDI‐T2EG electrodes exhibit 66% of the theoretical capacity at an ultrafast charge–discharge rate of 100C (72 s per cycle), while the PNDI‐T2 electrodes exhibit only 23% of the theoretical capacity. Electrochemical impedance spectroscopy measurements on thin (5 µm, 0.32 mg cm−2), high‐polymer‐content (80 wt%) electrodes reveal that PNDI‐T2EG exhibits much higher lithium‐ion diffusivity (DLi+ = 7.01 × 10−12 cm2 s−1) than PNDI‐T2 (DLi+ = 3.96 × 10−12 cm2 s−1). PNDI‐T2EG outperforms most previously reported materials in thick, high‐polymer‐content electrodes in terms of rate performance. The results demonstrate that the rate performance and capacity are significantly improved through the incorporation of EG side chains, and this work demonstrates a route for increasing the rate of ion transport in conjugated polymers and improving the performance and capacity of conjugated‐polymer‐based electrodes.en_US
dc.identifier.citationLi, Xiaoyi, Li, Yilin, Sarang, Kasturi, et al.. "Side‐Chain Engineering for High‐Performance Conjugated Polymer Batteries." <i>Advanced Functional Materials,</i> 31, no. 14 (2021) Wiley: https://doi.org/10.1002/adfm.202009263.en_US
dc.identifier.doihttps://doi.org/10.1002/adfm.202009263en_US
dc.identifier.urihttps://hdl.handle.net/1911/110485en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Wiley.en_US
dc.titleSide‐Chain Engineering for High‐Performance Conjugated Polymer Batteriesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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