Long‐Term Cycling Stability of Porphyrin Electrode for Li/Na Charge Storage at High Temperature

Autor: Jiahao Zhang, Chao Ye, Fangfang He, Youlian Zeng, Jing Xiao, Xiukang Yang, Hongbo Shu, Hongrui Qi, Wei Liu, Ping Gao
Rok vydání: 2023
Předmět:
Zdroj: ChemSusChem. 16
ISSN: 1864-564X
1864-5631
DOI: 10.1002/cssc.202202159
Popis: Bipolar redox organics have considered as potential next-generation electrode materials due to their sustainability, low cost and tunable structure. However, the development is still limited by the poor cycling stability and low energy density ascribed to the high dissolution and low conductivity of organic molecules. Herein, porphyrin-based bipolar organics of [5, 10, 15, 20-tetrathienylporphinato] M (II) (M=2H, Cu) are proposed as new stable organic electrodes. Enhanced cycling stability is obtained by a temperature-induced in situ polymerization strategy of porphyrin molecules, which exhibits excellent cycling stability up to 10000 times even at a high current density (5000 mA g-1) in organic lithium/sodium-based charge storage devices at 50 oC. In a symmetrical cell using CuTTP as both cathode and anode materials, a discharge capacity of 72 mAh g-1 is achieved after 600 cycles at 1000 mA g-1. This strategy would offer a new approach to developing stable energy storage bipolar material in organic-based devices at high temperature.
Databáze: OpenAIRE
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