Nanographene Cathode Materials for Nonaqueous Zn-Ion Batteries
Nanographene Cathode Materials for Nonaqueous Zn-Ion Batteries
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DOI：
10.1149/1945-7111/ac9f72
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发表时间：
2022-11
影响因子：
3.9
通讯作者：
Shakirul M. Islam;R. Malone;Wenlong Yang;Stephen P. George;R. Gautam;Wesley A. Chalifoux;Christopher J. Barile
中科院分区：
文献类型：
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作者：
Shakirul M. Islam;R. Malone;Wenlong Yang;Stephen P. George;R. Gautam;Wesley A. Chalifoux;Christopher J. Barile
多价离子在电极中的强相互作用是下一代电池研究的重大挑战。在这篇手稿中，我们设计了分子精确的纳米石墨烯阴极，与金属锌阳极相结合，以创建一类新的锌离子电池。我们的研究结果表明，虽然电极与石墨或平面纳米石墨烯不支持锌离子嵌入，较大的分子间间距在扭曲peropyrene使peropyrene电极，以促进可逆的锌离子嵌入在乙腈电解质。虽然大多数先前的Zn离子电池利用水性电解质，但非水性Zn电解质可以支持纳米石墨烯中的嵌入的发现对于扩展非水性多价电池的设计空间是重要的，非水性多价电池通常具有比其水性对应物更高的电压。此外，由于这些纳米石墨烯可以通过炔苯并环化使用自下而上的方法合成，这项工作为未来的电池电极铺平了道路，这些电极含有其他具有定制电化学性能的分子精确纳米石墨烯。
Robust multivalent ion interaction in electrodes is a grand challenge of next-generation battery research. In this manuscript, we design molecularly-precise nanographene cathodes that are coupled with metallic Zn anodes to create a new class of Zn-ion batteries. Our results indicate that while electrodes with graphite or flat nanographenes do not support Zn-ion intercalation, the larger intermolecular spacing in a twisted peropyrene enables peropyrene electrodes to facilitate reversible Zn-ion intercalation in an acetonitrile electrolyte. While most previous Zn-ion batteries utilize aqueous electrolytes, the finding that nonaqueous Zn electrolytes can support intercalation in nanographenes is important for expanding the design space of nonaqueous multivalent batteries, which often possess higher voltages than their aqueous counterparts. Furthermore, because these nanographenes can be synthesized using a bottom-up approach via alkyne benzannulation, this work paves the way for future battery electrodes that contain other molecularly-precise nanographenes with tailored electrochemical properties.