A zinc-conducting chalcogenide electrolyte

Abstract

A solid-state zinc-ion battery can fundamentally eliminate dendrite formation and hydrogen evolution on the zinc anode from aqueous systems. However, enabling fast zinc ion + conduction in solid crystals is thought to be impossible. Here, we demonstrated a fluorine-doping approach to achieving fast Zn 2+ transport in mesoporous Zn y S 1− x F x . The substitutional doping of fluoride ion with sulfide substantially reduces Zn 2+ migration barrier in a crystalline phase, while mesopore channels with bounded dimethylformamide enable nondestructive Zn 2+ conduction along inner pore surface. This mesoporous conductor features a high room-temperature Zn 2+ conductivity (0.66 millisiemens per centimeter, compared with 0.01 to 1 millisiemens per centimeter for lithium solid-state electrolyte) with a superior cycling performance (89.5% capacity retention over 5000 cycles) in a solid zinc-ion battery and energy density (0.04 watt-hour per cubic centimeter) in a solid zinc-ion capacitor. The universality of this crystal engineering approach was also verified in other mesoporous zinc chalcogenide materials, which implies various types of potential Zn 2+ -conducting solid electrolytes.

Li, Na, K, Mg, Zn, Al, and Ca Anode Interface Chemistries Developed by Solid‐State Electrolytes

“…Table 1 provides the state‐of‐the‐art multivalent SEs and their properties. [ 10–12,32,39,102,112–232 ]…”

Investigating the role of interstitial water molecules in copper hexacyanoferrate for sodium-ion battery cathodes

“…Prussian blue analogues (PBAs) are regarded as one of the multifunctional materials that can be applied to various energy systems, [1][2][3][4][5][6][7][8][9] such as catalysts, 10,11 sensors, 12,13 imaging systems, 14 biomedicine systems, 15 and water puriers. 16 The general chemical formula for PBAs is A x P[R(CN) 6 ] 1−y,y $zH 2 O (0 # x # 2, 0 # y # 1, and z is the number of water molecules), where A is a mobile cation, P and R are nitrogen and carbon-coordinated transition metal ions, respectively, , represents the [R(CN) 6 ] vacancy, and H 2 O is a crystal water molecule, which is usually an interstitial or coordinated water molecule.…”

Activating Gel Polymer Electrolyte Based Zinc-Ion Conduction with Filler-Integration for Advanced Zinc Batteries

“…The increasing demands of safety, recycling, and biocompatibility for the advanced electrochemical storage devices with high energy density are boosting the solid-state electrolyte-based batteries study in spite of the organic liquid electrolyte-based lithium ion batteries (LiBs) dominating the market nowadays. − Among them, QSZBs have attracted much attention as the potential next-generation energy storage device on account of the low electrochemical activity at ambience, high electrode specific capacity, flexibility, and abundant raw materials. − Meanwhile, besides the above advantages, QSZBs also can well solve the intractable issues of inherent side reaction and dendrite growth caused by aqueous electrolyte through removing the Zn 2+ solvation and weakening free-water molecule activity. − However, recently, the lack of deep understanding of the Zn 2+ transfer behavior and low electrochemical capability for the quasi solid gel electrolytes (QSE) have severe hindered the QSZBs practical development. − …”