TY  - JOUR
AU  - Long, Lifen
AU  - Huang, Yike
AU  - Zheng, Yun
AU  - Guo, Yan
AU  - Liu, Yinan
AU  - Shen, Yingying
AU  - Jia, Pingshan
AU  - Xu, Zikang
AU  - Dong, Shengyang
AU  - Shao, Huaiyu
TI  - All-solid-state proton batteries with a wide operation-temperature range of 160 °C
JO  - Energy Materials
PY  - 2026
VL  - 6
IS  - 7
SP  - 
EP  - 600069
SN  - ISSN 2770-5900 (Online)
AB  - <p>All-solid-state proton batteries are promising energy storage systems, in which the solid-state proton electrolyte plays an important role. However, achieving fast proton conduction over a wide temperature range is challenging. Here, we report zirconium hydrogen phosphate (ZHP) as a solid-state proton electrolyte. It shows ultra-high proton conductivity from -40 to 120 °C (0.15 to 66.76 mS·cm<sup>-1</sup>), a wide stability window (~5.5 V), and excellent long-term stability. Batteries using ZHP as electrolyte exhibit stable operation over a wide temperature range (160 °C), and retain 92% capacity after 12,000 cycles at room temperature. After 1,000 cycles, the batteries retain 100% capacity at -30 °C and 84.5% at 40 °C. This work provides new insights into the design and application of all-solid-state proton batteries capable of operating over a wide temperature range.</p>
KW  - Proton batteries
KW  - solid-state electrolyte
KW  - zirconium hydrogen phosphate
KW  - wide temperature range
KW  - high stability
DO  - 10.20517/energymater.2026.52
UR  - https://dx.doi.org/10.20517/energymater.2026.52