Enhanced dielectric losses in α-MnO2via protonation modulation

Tengchao Guo; Yuejun Feng; Bin Quan; Yuhang Zhuang; Guomin Sun; Liang Xue; Lingzhe Fang; Xiaohui Zhu

doi:10.1039/d4cc05988c

Enhanced dielectric losses in α-MnO₂via protonation modulation

Chem Commun (Camb). 2025 Jan 20. doi: 10.1039/d4cc05988c. Online ahead of print.

Authors

Tengchao Guo^{1

2}, Yuejun Feng³, Bin Quan², Yuhang Zhuang⁴, Guomin Sun², Liang Xue⁴, Lingzhe Fang⁵, Xiaohui Zhu^{1

3

2}

Affiliations

¹ Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China. [email protected].
² School of Chemistry and Materials Science, Nanjing University of Information Science and Technology, Nanjing 210044, China.
³ Jiangyin Electrical Alloy Co., Ltd, Jiangyin 214423, China.
⁴ School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. [email protected].
⁵ Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, USA. [email protected].

PMID: 39831790
DOI: 10.1039/d4cc05988c

Abstract

MnO₆ octahedra without distortions in α-MnO₂ have a low dipole content, which limits their dielectric loss capabilities. Herein, we develop protonated MnO₂ with distorted MnO₆ octahedra for increased dipole numbers via a two-step hydrothermal method. In comparison with α-MnO₂, this protonated MnO₂ provides greatly improved dipole polarization loss capabilities, resulting in a reflection loss value of -19.1 dB with an effective absorption bandwidth of 3.3 GHz at a low thickness of 2 mm.