Accordion-Like Carbon with High Nitrogen Doping for Fast and Stable K Ion Storage

Wenli Zhang, Minglei Sun, Jian Yin, Ke Lu, Udo Schwingenschlögl, Xueqing Qiu, Husam N. Alshareef

Research output: Contribution to journalArticlepeer-review

91 Scopus citations

Abstract

Potassium ion battery (PIB) is a potential candidate for future large-scale energy storage. A key challenge is that the (de)potassiation stability of graphitic carbon anodes is hampered by the limited (002) interlayer spacing. Amorphous carbon with a hierarchical structure can buffer the volume change during repeated (de)potassiation and enable stable cycling. Herein, a direct pyrolysis approach is demonstrated to synthesize a highly nitrogen-doped (26.7 at.%) accordion-like carbon anode composed of thin carbon nanosheets and a turbostratic crystalline structure. The hierarchical structure of accordion-like carbon is endowed by a self-assembly process during pyrolysis carbonization. The hierarchical nitrogen-doped accordion structure enables a high reversible capacity of 346 mAh g−1 and superior cycling stability. This work constitutes a general synthesis methodology that can be used to prepare hierarchical carbon anodes for advanced PIBs.
Original languageEnglish (US)
Pages (from-to)2101928
JournalAdvanced Energy Materials
DOIs
StatePublished - Sep 24 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-09-27
Acknowledgements: W.L.Z., M.L.S., and J.Y. contributed equally to this work. The authors acknowledge the financial support from King Abdullah University of Technology (KAUST), the financial support from the National Key Research and Development Plan (NO. 2018YFB1501503), the Research and Development Program in Key Fields of Guangdong Province (NO. 2020B1111380002), and the National Natural Science Foundation of China (No. 22108044). W.L.Z. acknowledges the financial support from the Guangdong Provincial Key Laboratory of Plant Resources Biorefinery (No. 2021GDKLPRB07, No. 2021GDKLPRB-K06).

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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