Authors
Kainian Chu, Weicheng Jie, Xia Cui, Maoqin Qiu, Junyu Li, Yiming Yang, Zhiqiang Li, Fangcai Zheng
Published in
RSC advances. Sep 02, 2026. Epub Sep 02, 2026.
Abstract
Carbon materials have many advantages as anode materials commonly used in potassium-ion batteries, but due to the limited layer spacing and large radius of K+, the theoretical intercalation capacity of K+ in carbon materials is low (279 mAh g-1). Therefore, expanding the layer spacing and increasing the number of active sites in carbon materials are the key to improving their potassium storage performance. In this work, we first synthesized N-doped porous carbon materials (N-PCs). The obtained N-PCs exhibited a porous structure of channel connection, which could shorten the diffusion paths of electrons and K+, and the doping of nitrogen atoms could improve the conductivity of carbon materials and increase the number of active sites. Then, the N-PCs were doped with sulfur to produce the final product S/N co-doped porous carbon materials (S/N-PCs). The introduction of sulfur could expand the layer spacing of N-PCs and improve the intercalation ability of K+. The configuration of N could also be adjusted to induce more active sites, further enhancing the storage capacity of carbon materials for K+. As expected, S/N-PCs, as an anode material for potassium-ion batteries, exhibit better electrochemical performance than N-PCs, and their reversible capacity after 100 cycles at 100 mA g-1 is 409 mAh g-1. Even at a high current density of 1000 mA g-1, their capacity after 2000 cycles remains as high as 305 mAh g-1.
PMID:
42689253
Bibliographic data and abstract were imported from PubMed on 03 Sep 2026.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 7
- Comments 0