Graphdiyne Oxide-Enabled Solid-State Proton Battery Exhibiting Superior Rate Capability.

Authors

Yang Huang, Zecheng Xiong, Hongye Liu, Hao Sun, Wei Su, Zheyao Chen, Wanqin Zhoumei, Huibiao Liu

Published in

Angewandte Chemie (International ed. in English). Pages e4266547. Jun 20, 2026. Epub Jun 20, 2026.

Abstract

Proton batteries are emerging as a promising next-generation energy storage technology, featuring high safety, superior power density, and excellent stability. However, the development of solid-state electrolytes with high proton conductivity remains a significant challenge. Herein, graphdiyne oxide (GDYO) is proposed as a novel solid-state electrolyte for proton batteries for the first time. By constructing a three-dimensional hydrogen bonding network with phosphoric acid, the resulting GDYO@H₃PO₄ electrolyte effectively addresses the low conductivity issue of conventional solid-state electrolytes at room temperature. Fourier-transform infrared (FTIR) spectroscopy and solid-state fluorescence spectroscopy confirm the formation of an interconnected hydrogen bonding network between GDYO sheets and H₃PO₄, facilitating efficient proton transport via a hopping transport mechanism. The assembled hydrous vanadium hexacyanoferrate//MoO₃ (VHCF//MoO₃) full solid-state proton battery demonstrates superior rate capability, retaining 53.6% of its capacity retention at an ultrahigh charge-discharge rate of 50C. Furthermore, the battery delivers remarkable cycling stability with a specific capacity of 102.2 mAh g^{- 1} and 90.2% capacity retention after 4500 cycles, significantly outperforming state-of-the-art systems. This research will provide a new way to construct solid-state proton battery with long cycling stability and high performance, and highlight the exceptional potential of GDYO as a molecular-level design platform for advanced electrocatalysts in solid-state batteries.

PMID:
42322151
Bibliographic data and abstract were imported from PubMed on 20 Jun 2026.

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