Zhang Shao-Jian, Hao Junnan, Wu Han, Kao Chun-Chuan, Chen Qianru, Ye Chao, Qiao Shi-Zhang
School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia.
ACS Nano. 2024 Oct 22;18(42):28557-28574. doi: 10.1021/acsnano.4c10901. Epub 2024 Oct 9.
Aqueous zinc-iodine batteries (ZIBs) based on the reversible conversion between various iodine species have garnered global attention due to their advantages of fast redox kinetics, good reversibility, and multielectron conversion feasibility. Although significant progress has been achieved in ZIBs with the two-electron I/I pathway (2eZIBs), their relatively low energy density has hindered practical application. Recently, ZIBs with four-electron I/I/I electrochemistry (4eZIBs) have shown a significant improvement in energy density. Nonetheless, the practical use of 4eZIBs is challenged by poor redox reversibility due to polyiodide shuttling during I/I conversion and I hydrolysis during I/I conversion. In this Review, we thoroughly summarize the fundamental understanding of two ZIBs, including reaction mechanisms, limitations, and improvement strategies. Importantly, we provide an intuitive evaluation on the energy density of ZIBs to assess their practical potential and highlight the critical impacts of the Zn utilization rate. Finally, we emphasize the cost issues associated with iodine electrodes and propose potential closed-loop recycling routes for sustainable energy storage with ZIBs. These findings aim to motivate the practical application of advanced ZIBs and promote sustainable global energy storage.
基于各种碘物种之间可逆转化的水系锌碘电池（ZIBs），因其具有快速氧化还原动力学、良好的可逆性和多电子转化可行性等优点而受到全球关注。尽管具有双电子I/I路径的水系锌碘电池（2eZIBs）已取得显著进展，但其相对较低的能量密度阻碍了实际应用。最近，具有四电子I/I/I电化学的水系锌碘电池（4eZIBs）在能量密度方面有了显著提高。然而，4eZIBs的实际应用受到挑战，这是由于在I/I转化过程中多碘化物穿梭以及在I/I转化过程中I水解导致氧化还原可逆性较差。在本综述中，我们全面总结了两种水系锌碘电池的基本认识，包括反应机理、局限性和改进策略。重要的是，我们对水系锌碘电池的能量密度进行了直观评估，以评估其实际潜力，并强调锌利用率的关键影响。最后，我们强调了与碘电极相关的成本问题，并提出了水系锌碘电池可持续储能的潜在闭环回收路线。这些发现旨在推动先进水系锌碘电池的实际应用，并促进全球可持续储能。
