Hydrogen‐Bonded Ionic Co‐Crystals for Fast Solid‐State Zinc Ion Storage

• DOI: 10.1002/adma.202407150
• Publication Date: 2024-10-07T04:10:55Z
• Authors: Hu Hong; Yu Wang; Yaqin Zhang; Bing Han; Qing Li; Xun Guo; Ying Guo; Ao Chen; Zhiquan Wei; Zhaodong Huang; Yuwei Zhao; Jun Fan; Chunyi Zhi
• Keywords: Overpotential

Abstract The development of new ionic conductors meeting the requirements current solid‐state devices is imminent but still challenging. Hydrogen‐bonded co‐crystals (HICs) are multi‐component crystals based on hydrogen bonding and Coulombic interactions. Due to bond network unique features crystals, HICs have flexible skeletons. More importantly, anion vacancies their surface can potentially help dissociate adsorb excess anions, forming cation transport channels at grain boundaries. Here, it demonstrated that a HIC optimized by adjusting ratio zinc salt imidazole construct boundary‐based fast Zn 2+ channels. as‐obtained solid electrolyte possesses an unprecedentedly high conductivity room low temperatures (≈11.2 mS cm −1 25 °C ≈2.78 −40 °C) with ultra‐low activation energy (≈0.12 eV), while restraining dendrite growth exhibiting overpotential even density (<200 mV 5.0 mA −2 ) during symmetric cell cycling. This also allows Zn||covalent organic framework full cells work temperatures, providing superior stability. support zinc‐ion hybrid supercapacitors work, achieving extraordinary rate capability power comparable aqueous solution‐based supercapacitors. provides path for designing facilely prepared, low‐cost, environmentally friendly extremely excellent interface compatibility.