Chen Zhi, Gao Ping, Wang Wu, Klyatskaya Svetlana, Zhao-Karger Zhirong, Wang Di, Kübel Christian, Fuhr Olaf, Fichtner Maximilian, Ruben Mario
Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P.R. China.
ChemSusChem. 2019 Aug 22;12(16):3737-3741. doi: 10.1002/cssc.201901541. Epub 2019 Jul 26.
Porphyrin complexes are well-known for their application in solar-cell systems and as catalysts; however, their use in electrochemical energy-storage applications has scarcely been studied. Here, a tetra-alkenyl-substituted [5,10,15,20-tetra(ethynyl)porphinato]copper(II) (CuTEP) complex was used as anode material in a high-performance lithium-free CuTEP/PP TFSI/graphite cell [PP TFSI=1-butyl-1-methylpiperidinium bis(trifluoromethylsulfonyl)imide]. Thereby, the influence of size and morphology on the electrochemical performance of the cell was thoroughly investigated. Three different nanocrystal CuTEP morphologies, namely nanobricks, nanosheets, and nanoribbons, were studied as anode material, and the best cyclability and highest rate capability were obtained for the nanoribbon samples. A high specific power density of 14 kW kg (based on active material) and excellent rechargeability were achieved with negligible capacity decay over 1000 cycles at a high current density of 5 A g . These results indicate that the porphyrin complex CuTEP could be a promising electrode material in high-performance lithium-free batteries.
卟啉配合物因其在太阳能电池系统中的应用以及作为催化剂而广为人知；然而，它们在电化学储能应用中的使用却鲜有研究。在此，一种四烯基取代的[5,10,15,20-四（乙炔基）卟吩铜（II）]（CuTEP）配合物被用作高性能无锂CuTEP/PP TFSI/石墨电池[PP TFSI = 1-丁基-1-甲基哌啶双（三氟甲基磺酰）亚胺]的负极材料。由此，深入研究了尺寸和形貌对电池电化学性能的影响。研究了三种不同纳米晶体CuTEP形貌，即纳米砖、纳米片和纳米带作为负极材料，其中纳米带样品获得了最佳的循环稳定性和最高的倍率性能。在5 A g的高电流密度下，基于活性材料的比功率密度高达14 kW kg，且具有出色的可充电性，在1000次循环中容量衰减可忽略不计。这些结果表明，卟啉配合物CuTEP可能是高性能无锂电池中有前景的电极材料。
