Hierarchical Nanostructured Benzoic Naphthalene Tetracarboxylic Di‐imide Organic Cathode for Lithium Ion Battery

Abstract

Organic redox active molecules are the promising electrode materials for the Lithium‐ion batteries (LIBs). The semiconducting nature and morphology of these materials provide more efficient charge transport. Hence, it is very important to perform systematic study of such molecules. Herein, we proposed single step synthesis of the benzoic naphthalene diimide (Benzoic‐NTCDI) by the reaction of 1, 4, 5, 8‐ naphthalene tetracarboxylic dianhydride with 4‐amino benzoic acid in presence of hydrated zinc acetate as a catalyst. As‐synthesized benzoic NTCDI is characterised by using different characterization techniques. The morphological study clearly demonstrate hierarchical porous assembly of 3–5 micron comprised with nanopetals of thickness 5–10 nm. In this hierarchical nanostructure, the nanopetals are originated from the centre and confer voids between the layers of petals. This creates porosity throughout the hierarchical assembly. Considering such unique porous nanostructure and good conductivity of the Benzoic‐NTCDI (1.19×10−5 S/m), it has been used as a cathode for LIB.The Li‐cell was fabricated using Benzoic‐NTCDI as a cathode which demonstrated the reversible capacity of 102 mAhg−1 at 0.05 C rate. Moreover, the capacity of 91 mAhg−1 is retained at current density of 0.1 C exhibiting good rate capability after 24 cycles. The Li‐ion transport has been accelerated is ascribed to the porous hierarchical nanostructure. The potential of one of the heterocyclic molecule with hierarchical nanostructure as a cathode for lithium ion batteries (LIBs) has been demonstrated for the first time

Data-driven discovery of carbonyl organic electrode molecules: machine learning and experiment

“…S13†). In addition, NT exhibits excellent cycling performance of 2500 cycles at 1 A g −1 , reaching a discharge voltage of up to 2.5 V. Moreover, compared with other organic carbonyl cathode materials, NT exhibits a pretty high energy density and cycle life 8,10,31–45 (Fig. 6e, Table S5†).…”

Organic Cathode Materials for Lithium‐Ion Batteries: Past, Present, and Future

“…Since 2008, there have been a large number of reports on the utilization of organic imide lithium salts as cathode materials for LIBs. [ 122 ] The major advantage of the organic lithium salts is that small molecules can be connected to each other through the chelating bonds O − Li +… O − , which can alleviate the dissolution of the small organic molecules in the nonaqueous electrolyte to some extent, thereby improving the cycling stability of the electrodes. When the pyromellitic diimide lithium salt (Li 2 –PMDI) was used as a cathode material, each imide unit could reversibly accept two Li ions, resulting in an initial reversible capacity of 220 mA h g −1 and maintaining at 200 mA h g −1 after 25 cycles.…”