Synergistic Kinetics Modulation at Graphite Interface Enables Ultrafast and Durable Potassium‐Ion Batteries DOI

Xuemei Ma,

Hongwei Fu,

Hang Xia

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract Graphite has been considered as the most promising anode material for potassium‐ion batteries (PIBs) commercialization due to its high theoretical specific capacity and favorable charge‐discharge platform. Nevertheless, in conventional KPF 6 ‐based electrolytes, practical implementation is hindered by sluggish (K + ) transport through solid electrolyte interphase (SEI), leading poor rate capability inferior cycling durability. A nanostructured SiO 2 modification layer constructed on a graphite surface (SiO ‐Graphite) regulate interfacial kinetics, which can enable faster K diffusion lower migration barrier. Notably, ‐Graphite exhibits initial Coulombic efficiency (84.1%), excellent stability (400 cycles with retention of 71%), high‐rate (213 mAh g −1 at current density 500 mA electrolyte. In addition, PB||SiO full cell also demonstrates good (90% after 600 cycles) performance (high 2000 ), outperforms that previously reported PIBs systems. This kinetics regulation strategy provides new insights into improving electrodes.

Language: Английский

Customizing Helmholtz Plane with N, F, P Tri‐Doped rGO/CNT Aerogel Protective Layer for Long‐Life Zinc‐Ion Batteries DOI

Lirong Feng,

Ang Li,

Jinkai Zhang

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract The practical application of aqueous zinc‐ion batteries (AZIBs) is impeded by dendrite formation and water‐induced parasitic reactions at the anodes. In this article, a relatively hydrophobic inner Helmholtz plane (IHP) an outer (OHP) with abundant nucleation sites are engineered through coating N, F, P heteroatom doped reduced graphene oxide/carbon nanotube (NFP‐rGO‐CNT) multifunctional aerogel protective layer. rGO certain hydrophobicity construct lean‐water environment IHP, effectively blocking adverse between water metallic Zn, while zincophilic uniformly distributed heteroatoms facilitate Zn 2+ migration homogenize flux OHP, thereby promoting directional deposition along (002) crystal plane. Consequently, fabricated NFP‐rGO‐CNT/Zn//Cu asymmetric cell exhibits high Coulombic efficiency close to 100% for 3200 cycles. addition, symmetric assembled NFP‐rGO‐CNT/Zn electrodes presents impressive lifespan 1990 h 5 mA cm −2 2 mAh , significantly outperforming control group (about 27 h). More remarkably, NFP‐rGO‐CNT/Zn//V O 3 pseudo‐pouch capable powering small fan rotate steadily. This layer strategy offers novel perspective HP regulation, enabling textured reversible

Language: Английский

Citations

0
Synergistic Kinetics Modulation at Graphite Interface Enables Ultrafast and Durable Potassium‐Ion Batteries DOI

Xuemei Ma,

Hongwei Fu,

Hang Xia

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract Graphite has been considered as the most promising anode material for potassium‐ion batteries (PIBs) commercialization due to its high theoretical specific capacity and favorable charge‐discharge platform. Nevertheless, in conventional KPF 6 ‐based electrolytes, practical implementation is hindered by sluggish (K + ) transport through solid electrolyte interphase (SEI), leading poor rate capability inferior cycling durability. A nanostructured SiO 2 modification layer constructed on a graphite surface (SiO ‐Graphite) regulate interfacial kinetics, which can enable faster K diffusion lower migration barrier. Notably, ‐Graphite exhibits initial Coulombic efficiency (84.1%), excellent stability (400 cycles with retention of 71%), high‐rate (213 mAh g −1 at current density 500 mA electrolyte. In addition, PB||SiO full cell also demonstrates good (90% after 600 cycles) performance (high 2000 ), outperforms that previously reported PIBs systems. This kinetics regulation strategy provides new insights into improving electrodes.

Language: Английский

Citations

0