A solid-state battery capable of 180 C superfast charging and 100% energy retention at-30 °C

• 成果类型: Article
• 署名作者: Hong, Hu; Wei, Zhiquan; Wang, Yiqiao; Yang, Xinru; Guo, Xun; Nian, Qingshun; Li, Xinliang; Li, Qing; Wang, Shixun; Li, Shimei; Zhang, Dechao; Xiong, Qi; Huang, Zhaodong; Zhi, Chunyi
• 署名单位: City University of Hong Kong; The University of Hong Kong Shenzhen Institute of Research & Innovation; University of Hong Kong; University of Hong Kong; Zhengzhou University; University of Macau; University of Hong Kong; University of Hong Kong
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-11929
• DOI: 10.1073/pnas.2511121122
• 发表日期: 2025-09-08
• 关键词: electrolyte; copper

摘要

Solid-state electrolytes (SSEs) are being extensively researched as replacements for liquid electrolytes in future batteries. Despite significant advancements, there are still challenges in using SSEs, particularly in extreme conditions. This study presents a hydrated metal-organic ionic cocrystal (HMIC) solid-state ion conductor with a solvent-assisted ion transport mechanism suitable for extreme operating conditions. Through crystal engineering strategies, the adsorption capacity of HMIC for anions and water molecules can be regulated, thereby facilitating cation hopping transport and enhancing electrochemical stability. As a result, optimized HMIC shows exceptional properties, including an extraordinarily high Zn2+ transference number (t(Zn2+) = 0.81), an expanded electrochemical stability window (similar to 2.6 V), and an exceptionally high Zn2+ ion conductivity (8.6 mS cm(-1), 25 degrees C). Interface dynamics analysis indicates that this strong binding to water molecules can significantly reduce the desolvation energy barrier and enhance the ionic diffusion coefficient. (10 to 100 times higher than that in aqueous electrolytes). This allows Zn|| Prussian blue analog batteries to exhibit impressive fast-charging performance (180 C, 20 s, over 1,000 charge/discharge cycles) and maintain 100% discharge capacity retention and discharge plateau from -30 to 30 degrees C. The development of HMICs with a solvent-assisted hopping mechanism provides a promising path for solid-state zinc-ion batteries in extreme conditions, including fast charging, low temperature, and high loading.