Abstract
Although conversion-type iodine-based batteries are considered promising for energy storage systems, stable electrode materials are scarce, especially for high-performance multi-electron reactions. The use of tin-based iodine-rich 2D Dion–Jacobson (DJ) ODASnI4 (ODA: 1,8-octanediamine) perovskite materials as cathode materials for iodine-based batteries is suggested. As a proof of concept, organic lithium-perovskite and aqueous zinc-perovskite batteries are fabricated and they can be operated based on the conventional one-electron and advanced two-electron transfer modes. The active elemental iodine in the perovskite cathode provides capacity through a reversible I−/I+ redox pair conversion at full depth, and the rapid electron injection/extraction leads to excellent reaction kinetics. Consequently, high discharge plateaus (1.71 V vs Zn2+/Zn; 3.41 V vs Li+/Li), large capacity (421 mAh g−1I), and a low decay rate (1.74 mV mAh−1 g−1I) are achieved for lithium and zinc ion batteries, respectively. This study demonstrates the promising potential of perovskite materials for high-performance metal-iodine batteries. Their reactions based on the two-electron transfer mechanism shed light on similar battery systems aiming for decent operational stability and high energy density.
| Original language | English |
|---|---|
| Article number | 2304557 |
| Journal | Advanced Materials |
| Volume | 36 |
| Issue number | 4 |
| Early online date | 16 Aug 2023 |
| DOIs | |
| Publication status | Published - 25 Jan 2024 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2023 Wiley-VCH GmbH.
Funding
This research was supported by the RGC Collaborative Research Fund under Project C1002-21G, Guangdong Province Science and Technology Department (project 2020A0505100014), the Croucher Foundation of Hong Kong, and the Centre for Functional Photonics, City University of Hong Kong. This research was also supported in part by InnoHK Project on [Project 1.4 – Flexible and Stretchable Technologies (FAST) for monitoring of CVD risk factors: Soft Battery and self-powered, flexible medical devices] at Hong Kong Centre for Cerebro-cardiovascular Health Engineering (COCHE).
Keywords
- active iodine ligands
- conversion-type batteries
- Dion–Jacobson tin-iodide perovskites
- multi-electron reactions
- perovskite cathode