Preferential Pyrolysis Construction of Carbon Anodes with 8400 h Lifespan for High-Energy-Density K-ion Batteries

Jian Yin, Junjie Jin, Cailing Chen, Yongjiu Lei, Zhengnan Tian, Yizhou Wang, Zhiming Zhao, Abdul Hamid Emwas, Yunpei Zhu, Yu Han, Udo Schwingenschlögl, Wenli Zhang*, Husam N. Alshareef*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Carbonaceous materials are promising anodes for practical potassium-ion batteries, but fail to meet the requirements for durability and high capacities at low potentials. Herein, we constructed a durable carbon anode for high-energy-density K-ion full cells by a preferential pyrolysis strategy. Utilizing S and N volatilization from a π–π stacked supermolecule, the preferential pyrolysis process introduces low-potential active sites of sp2 hybridized carbon and carbon vacancies, endowing a low-potential “vacancy-adsorption/intercalation” mechanism. The as-prepared carbon anode exhibits a high capacity of 384.2 mAh g−1 (90 % capacity locates below 1 V vs. K/K+), which contributes to a high energy density of 163 Wh kg−1 of K-ion full battery. Moreover, abundant vacancies of carbon alleviate volume variation, boosting the cycling stability over 14 000 cycles (8400 h). Our work provides a new synthesis approach for durable carbon anodes of K-ion full cells with high energy densities.

Original languageEnglish (US)
Article numbere202301396
JournalAngewandte Chemie - International Edition
Issue number17
StatePublished - Apr 17 2023


  • Carbon Anode
  • Potassium-Ion Battery
  • Preferential Pyrolysis
  • sp Hybridized Carbon
  • Vacancy

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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