Guo Zhaowei, Huang Jianhang, Dong Xiaoli, Xia Yongyao, Yan Lei, Wang Zhuo, Wang Yonggang
Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Centre of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, China.
Nat Commun. 2020 Feb 19;11(1):959. doi: 10.1038/s41467-020-14748-5.
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 MnO@graphite felt cathode in an acid electrolyte. Its operation involves a quinone/hydroquinone redox reaction on anode and a MnO/Mn conversion reaction on cathode, in parallel with the transfer of HO between two electrodes. The distinct operation mechanism affords this hydronium-ion battery an energy density up to 132.6 Wh kg and a supercapacitor-comparable power density of 30.8 kW kg, 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 °C, and superior rate performance and cycle stability remain at -70 °C.
水合氢离子电池因其成本效益和可持续性优点，被视为最有前景的下一代能源技术之一。在此，我们提出一种水合氢离子电池，它在酸性电解质中基于有机芘 - 4,5,9,10 - 四酮阳极和无机MnO@石墨毡阴极。其运行涉及阳极上的醌/对苯二酚氧化还原反应和阴极上的MnO/Mn转化反应，同时伴随着H⁺在两个电极之间的转移。这种独特的运行机制使这种水合氢离子电池具有高达132.6 Wh kg的能量密度和30.8 kW kg的与超级电容器相当的功率密度，以及超过5000次循环的长期循环寿命。此外，令人惊讶的是，这种水合氢离子电池即使在-40°C的冷冻电解质下也能正常工作，并且在-70°C时仍具有优异的倍率性能和循环稳定性。
