Supramolecular Crystals based Fast Single Ion Conductor for Long-Cycling Solid Zinc Batteries
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
---|---|
Article number | e202406683 |
Journal / Publication | Angewandte Chemie - International Edition |
Volume | 63 |
Issue number | 52 |
Online published | 4 Nov 2024 |
Publication status | Published - 20 Dec 2024 |
Link(s)
Abstract
The solid polymer electrolytes (SPEs) used in Zn-ion batteries (ZIBs) have low ionic conductivity due to the sluggish dynamics of polymer segments. Thus, only short-range movement of cations is supported, leading to low ionic conductivity and Zn2+ transference (tZn2+). Zn-based supramolecular crystals (ZMCs) have considerable potential for supporting long-distance Zn2+ transport; however, their efficiency in ZIBs has not been explored. The present study developed a ZMC consisting of succinonitrile (SN) and zinc bis (trifluoromethylsulfonyl) imide (Zn(TFSI)2), with a structural formula identified as Zn(TFSI)2SN3. The ZMC has ordered three-dimensional tunnels in the crystalline lattices for ion conduction, providing high ionic conductivities (6.02×10−4 S cm−1 at 25 °C and 3.26×10−5 S cm−1 at −35 °C) and a high tZn2+ (0.97). We demonstrated that a Zn‖Zn symmetrical battery with ZMCs has long-term cycling stability (1200 h) and a dendrite-free Zn plating/stripping process, even at a high plating areal density of 3 mAh cm−2. The as-fabricated solid-state Zn battery exhibited excellent performance, including high discharge capacity (1.52 mAh cm−2), long-term cycling stability (83.6 % capacity retention after 70000 cycles (7 months)), wide temperature adaptability (−35 to 50 °C) and fast charging ability. The ZMC differs from SPEs in its structure for transporting Zn2+ ions, significantly improving solid-state ZIBs while maintaining safety, durability, and sustainability. © 2024 Wiley-VCH GmbH.
Research Area(s)
- ion hopping, molecular crystals, solid electrolytes, zinc batteries, zinc ion batteries
Citation Format(s)
Supramolecular Crystals based Fast Single Ion Conductor for Long-Cycling Solid Zinc Batteries. / Chen, Ze; Huang, Zhaodong; Wang, Chenlu et al.
In: Angewandte Chemie - International Edition, Vol. 63, No. 52, e202406683, 20.12.2024.
In: Angewandte Chemie - International Edition, Vol. 63, No. 52, e202406683, 20.12.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review