Ultrastable Surface-Dominated Pseudocapacitive Potassium Storage Enabled by Edge-Enriched N-Doped Porous Carbon Nanosheets

Xu F, Zhai Y, Zhang E, Liu Q, Jiang G, Xu X, Qiu Y, Liu X, Wang H, Kaskel S (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Angewandte Chemie International Edition Wiley

Book Volume: 59

Pages Range: 19460-19467

Journal Issue: 44

DOI: 10.1002/anie.202005118

Abstract

The development of ultrastable carbon materials for potassium storage poses key limitations caused by the huge volume variation and sluggish kinetics. Nitrogen-enriched porous carbons have recently emerged as promising candidates for this application; however, rational control over nitrogen doping is needed to further suppress the long-term capacity fading. Here we propose a strategy based on pyrolysis–etching of a pyridine-coordinated polymer for deliberate manipulation of edge-nitrogen doping and specific spatial distribution in amorphous high-surface-area carbons; the obtained material shows an edge-nitrogen content of up to 9.34 at %, richer N distribution inside the material, and high surface area of 616 m2 g−1 under a cost-effective low-temperature carbonization. The optimized carbon delivers unprecedented K-storage stability over 6000 cycles with negligible capacity decay (252 mA h g−1 after 4 months at 1 A g−1), rarely reported for potassium storage.

Involved external institutions

Northwestern Polytechnical University / 西北工业大学 (NPU/NWPU) CN China (CN) Technische Universität Dresden DE Germany (DE) Jilin University (JLU) / 吉林大学 CN China (CN)

How to cite

APA:

Xu, F., Zhai, Y., Zhang, E., Liu, Q., Jiang, G., Xu, X.,... Kaskel, S. (2020). Ultrastable Surface-Dominated Pseudocapacitive Potassium Storage Enabled by Edge-Enriched N-Doped Porous Carbon Nanosheets. Angewandte Chemie International Edition, 59(44), 19460-19467. https://doi.org/10.1002/anie.202005118

MLA:

Xu, Fei, et al. "Ultrastable Surface-Dominated Pseudocapacitive Potassium Storage Enabled by Edge-Enriched N-Doped Porous Carbon Nanosheets." Angewandte Chemie International Edition 59.44 (2020): 19460-19467.

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