Hao, Z;
Feng, J;
Liu, Y;
Kang, L;
Wang, B;
Gu, J;
Sheng, L;
... Wang, FR; + view all
(2022)
Reversible lithium storage in sp² hydrocarbon frameworks.
Journal of Energy Chemistry
, 66
pp. 161-167.
10.1016/j.jechem.2021.07.019.
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Abstract
Polymer materials offer controllable structure-dependent performances in separation, catalysis and drug release. Their molecular structures can be precisely tailored to accept Li+ for energy storage applications. Here the design of sp2 carbon-based polyphenylene (PPH) with high lithium-ion uptakes and long-term stability is reported. Linear-PPH (L-PPH) exceeds the performance of crosslink-PPH (C-PPH), due to the fact that it has an ordered lamellar structure, promoting the Li+ intercalation/deintercalation channel. The L-PPH cell shows a clear charge and discharge plateau at 0.35 and 0.15 V vs. Li+/Li, respectively, which is absent in the C-PPH cell. The Li+ storage capacity of L-PPH is five times that of the C-PPH. The reversible storage capacity is further improved to 261 mAh g−1 by functionalizing the L-PPH with the –SO3H groups. In addition, the Li-intercalated structures of C-PPH and L-PPH are investigated via near-edge X-ray absorption fine structure (NEXAFS), suggesting the high reversible Li+ - C=C bond interaction at L-PPH. This strategy, based on new insight into sp2 functional groups, is the first step toward a molecular understanding of the structure storage-capacity relationship in sp2 carbon-based polymer.
| Type: | Article |
|---|---|
| Title: | Reversible lithium storage in sp² hydrocarbon frameworks |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jechem.2021.07.019 |
| Publisher version: | https://doi.org/10.1016/j.jechem.2021.07.019 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | Lithium-ions battery, Organic anode, Topological structure, sp2 hydrocarbon |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10132698 |
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