Three-Dimensional Engineering of Sulfur/MnO<sub>2</sub> Composites for High-Rate Lithium–Sulfur Batteries
Zihe Chen, Yuxin Hu, Wei Liu, Yu Fang, Xue‐Feng Yu, Tao Mei, Yu Li, Xianbao Wang
Abstract
Herein, a three-dimensional interconnected sulfur (3DIS) system is used to construct a cathode of the lithium–sulfur battery. Compared with the traditional methods of encapsulating sulfur, the 3DIS system serves as a framework to grow MnO2, which ensures a high sulfur content of 91.5 wt % (the ratio of sulfur/host was 10.8) and a uniform distribution of sulfur. Due to the synergistic effect of the 3D interconnected architecture and the uniform coating layer of polar MnO2, 3DIS@MnO2 (3DISMO) delivers a capacity of 891 mA h g–1 after 900 cycles at 1 C. Even at a rate of 10 C, a capacity decay rate of 0.061% per cycle is achieved.
Topics & Concepts
SulfurMaterials scienceCathodeCoatingLithium (medication)Lithium–sulfur batteryLayer (electronics)Composite materialChemical engineeringElectrochemistryMetallurgyElectrodeChemistryPhysical chemistryEngineeringEndocrinologyMedicineAdvanced Battery Materials and TechnologiesAdvancements in Battery MaterialsThermal Expansion and Ionic Conductivity