| 초록 |
Recently, there is growing demand for the development of new electrode materials with high capacity and good electrochemical stability for their widespread uses in energy storage applications. Organic compounds have particularly emerged as promising candidates for future electrode materials owing to high energy density, low environment toxicity, and low cost. Herein, we report a facile synthesis of a set of naphthoquinone (NQ)-based organic materials for lithium organic batteries. The simple organic substitution reactions of NQ ring with amine groups resulted in significantly reduced band gap of 2.7 eV, thereby enabling rate capability up to 20C. Theoretical examination using DFT calculations was in good agreement with our experimental results. Long cycle life was successfully achieved by employing surface functionalized carbon frameworks, where the strong intermolecular interactions between NQ-derivatives and carbon reduced the dissolution of active materials into liquid electrolytes. |
