An organic/inorganic electrode-based hydronium-ion battery
An organic/inorganic electrode-based hydronium-ion battery
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DOI：
10.1038/s41467-020-14748-5
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发表时间：
2020-02-19
影响因子：
16.6
通讯作者：
Wang, Yonggang
中科院分区：
文献类型：
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作者：
Guo, Zhaowei;Huang, Jianhang;Wang, Yonggang
氢离子电池因其成本效益和可持续发展等优点，被认为是最有前途的新一代能源技术之一。在本文中，我们提出了一种在酸性电解液中，以有机的4，5，9，10-四酮为正极，以无机的MnO_2@石墨毡为正极的氢离子电池。它的操作包括阳极上的对苯二酚/对苯二酚氧化还原反应和阴极上的MnO2/Mn2+转化反应，以及H3O+在两个电极之间的转移。独特的工作机制使这种离子电池的能量密度高达132.6Whkg(-1)，超级电容器的功率密度为30.8kWkg(-1)，循环寿命超过5000次。此外，令人惊讶的是，这种离子电池即使在-40摄氏度以下的冰冻电解液中也能很好地工作，并且在-70摄氏度时仍保持着优异的倍率性能和循环稳定性。作者展示了一种以有机芘-4，5，9，10-四酮为负极，以MnO2@石墨为阴极，H3O+为电荷载体的氢离子电池。除了表现出良好的能量密度和功率密度外，这种电池即使在-40摄氏度到-70摄氏度的低温下也能很好地工作。
Hydronium-ion batteries are regarded as one of the most promising energy technologies as next-generation power sources, benefiting from their cost effectivity and sustainability merits. Herein, we propose a hydronium-ion battery which is based on an organic pyrene-4,5,9,10-tetraone anode and an inorganic MnO2@graphite felt cathode in an acid electrolyte. Its operation involves a quinone/hydroquinone redox reaction on anode and a MnO2/Mn2+ conversion reaction on cathode, in parallel with the transfer of H3O+ between two electrodes. The distinct operation mechanism affords this hydronium-ion battery an energy density up to 132.6Whkg(-1) and a supercapacitor-comparable power density of 30.8kWkg(-1), along with a long-term cycling life over 5000 cycles. Furthermore, surprisingly, this hydronium-ion battery works well even with a frozen electrolyte under -40 degrees C, and superior rate performance and cycle stability remain at -70 degrees C. The authors show a hydronium-ion battery with an organic pyrene-4,5,9,10-tetraone anode and a MnO2@graphite cathode and H3O+ as the charge carrier. In addition to exhibiting promising energy density and power density, this battery works well even under low temperatures ranging from -40 degrees C to -70 degrees C.