High-Performance PDB Organic Cathodes Reinforced by 3D Flower-like Carbon for Lithium-/Sodium-Ion Batteries
Cunguo Wang, Qun Ji, Rongrong Chu, Zaka Ullah, Mengge Zheng, Xuan Dong, Yue Sun, Qi Li, Liwei Liu
Abstract
Organic compound materials offer environmental protection, abundant resources, strong versatility in structure, and low-cost assembly, owing to which these being recognized as auspicious cathode materials for lithium- and sodium-ion batteries. However, the inherent higher solubility and lower conductivity of organic compound materials severely affect their industrial applications. Herein, we report a poly(2,3-dithio-1,4-benzoquinone) composite with three-dimensional flower-like porous carbon (PDB/3D-FC) as a worthy choice for a battery electrode. The in situ polymerization methodology makes the distribution of PDB more uniform, and the three-dimensional flower-like porous carbon structure prevents the accumulation of PDB. Moreover, the hierarchical porous structure of PDB/3D-FC provides an effective transport path for electrons/ions. Taking benefit from the desirable fabrication strategy and well-chosen materials, the PDB/3D-FC electrode exhibits an excellent rate capacity of 203 mAh g–1 in a lithium-ion battery and 183 mAh g–1 in a sodium-ion battery under an ultrahigh current density of 1 A g–1. The preparation strategy reported in this paper is general and suitable for enhancing the electrochemical characteristics of other organic electrode materials.