Organic electrode materials for lithium-ion batteries are essential tools for energy storage systems starting from portable electronics to electric vehicles. Many attempts have been made to improve the electrochemical behavior of organic electrode materials for lithium-ion batteries. Herein we have proposed a new electrode material called Aurin tricarboxylic acid synthesized via the condensation of aldehyde and acid in the presence of sodium nitrite which is further converted into the metal-organic framework using copper salt to increase its conductivity and used as an anode material for both aqueous and non-aqueous rechargeable lithium-ion batteries. The electrochemical performance of modified Aurin Tricarboxylic acid copper metal-organic framework (ATC-MOF) was studied using cyclic voltammetry, galvanostatic cycling with potential limitation and Potentio electrochemical impedance spectroscopy techniques and the structures were confirmed using 1 H-NMR, FT-IR spectroscopy, and Powder XRD techniques. It exhibits excellent cyclability and a good discharge capacity of about 438.09 mA h g −1 in a non-aqueous electrolyte and 169.69 mAh g −1 in an aqueous electrolytic system. The electrochemical activity of the ATC-MOF shows that it can be used as electrode material in aqueous and non-aqueous rechargeable lithium-ion battery systems.
The present work focuses on a novel synthetic approach for a bis‐Indole derivative and its applications in energy storage devices. Here, an aqueous rechargeable lithium ion battery (ARLIB) with organic active material electrodes of inexpensive and sustainable, bis‐indole derivative called 2‐[1H‐indol‐2‐yl(1H‐indol‐3‐yl)methyl]phenol (b‐IMP) and Lithiated quinizarin (Li‐QZ) are used as cathode and anode respectively in saturated Li2SO4supporting electrolyte. The electrochemical activities of these organic redox active materials are studied using cyclic voltammetry, galvanostatic charge potential limit and potentiostatic electrochemical impedance spectroscopy methods. The cell b‐IMP | Sat. Li2SO4 | Li‐QZ has delivered an exceptionally better cell‐voltage of 0.7 V with a discharge capacity of 292 mA h g−1 with 92% columbic efficiency even after 300 cycles. The cell comprises of b‐IMP and Li‐QZ as cathode and anode materials respectively, which exhibits remarkable cyclizability with good discharge capacity and thus signifies a major advance in organic ARLIBs.
Two organic compounds namely Acridine (ACD) and 9-aminoacridine (ACD-NH2) have been investigated as electrode materials for an aqueous rechargeable lithium-ion battery (ARLIB) applications. The electrochemical investigations reveal that the active species act as anodes in ARLIB systems. In this regard, nitrogen group act as redox center and undergo electrochemical reaction with Li-ions during charge and discharge process. The synthesis of 9-amonoacridine is done by standard method called chichibabin reaction. Amination of ACD enhances the electrochemical behaviour of the molecule. To improve the electrochemical performances of ACD & ACD-NH2, graphene is used as an additive for ARLIB system. The decorated molecules such as decorated Acridine (dACD) and decorated 9-aminoacridine (dACD-NH2) showed improved electrochemical performance as compared with ACD & ACD-NH2. The decoration is of great importance concerning capacity, reversibility and stability of cycling behavior during charge and discharge processes. Charge/discharge tests show that ACD, ACD-NH2, dACD, and dACD-NH2 have achieved initial discharge capacities of 119, 122, 149 and 220 mAh g-1 respectively at a current density of 0.2 mA. The good cyclic performance and agreeable discharge capacity of the cell signifies the application of dACD-NH2 as anode material for ARLIB system.
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