Sulfur-Mediated Charge Delocalization Enables High-Voltage p-Type Polymer Cathodes for Ultralow-Temperature Potassium Dual-Ion Full Cells.

Wenjun Li, Yutian Liu, Yi Fu, Jianyou Shi, Wu Tang

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Article in Advanced materials (Deerfield Beach, Fla.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Wenjun LiSchool of Materials and Energy, University of Electronic Science and Technology of China (UESTC), Chengdu, China.

Yutian LiuSchool of Materials and Energy, University of Electronic Science and Technology of China (UESTC), Chengdu, China.

Yi FuSchool of Materials and Energy, University of Electronic Science and Technology of China (UESTC), Chengdu, China.

Jianyou ShiDepartment of Pharmacy, Personalized Drug Research and Therapy Key Laboratory of Sichuan Province, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China.ORCID https://orcid.org/0000-0002-1026-0282

Wu TangSchool of Materials and Energy, University of Electronic Science and Technology of China (UESTC), Chengdu, China.ORCID https://orcid.org/0000-0001-5295-5384

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

High-voltage organic cathodes based on nitrogen-rich aromatic systems have been widely explored for sustainable potassium dual-ion batteries, yet their practical application remains hindered by insufficient redox potential, poor structural stability, and sluggish kinetics under extreme conditions. Here, we establish sulfur-mediated charge delocalization as a design strategy to overcome these fundamental limitations. By strategically incorporating electron-delocalizing sulfur atoms into the phenazine framework, we achieve extended π-conjugation and efficient delocalization of charges and electrons, thereby enhancing electronic conductivity and elevating the redox potential. Specifically, we develop a sulfur-substituted p-type conjugated polymer, poly[10-methyl-3-(phenazin-5(10H)-yl)-10H-phenothiazine] (P(PhTz)), as a model system to realize this concept. P(PhTz) exhibits an average discharge potential of 3.70 V (vs. K

Indexed as

high energy densitypotassium dual‐ion batteryp‐type organic cathodesulfur‐mediated charge delocalizationultralow‐temperature performance

Identifiers

PMID42351299

DOI10.1002/adma.73760

PMCPMC13431697

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