Nitrate Salt Assisted Fabrication of Highly N-Doped Carbons for High-Performance Sodium Ion Capacitors
By Dong, Guanghe; Wang, Huanlei; Liu, Wei; Shi, Jing; Sun, Shijiao; Li, Dong; Zhang, Hao; Yang, Yunpeng; Cui, Yongpeng
Published in ACS Applied Energy Materials
2018
Abstract
Hybrid sodium ion capacitors have been considered promising energy storage devices with superior energy and power performances by combining the advantages of batteries and supercapacitors. However, it is desirable to design anode materials with large specific capacity and excellent rate performance. Herein, we provide a large-scalable process to create the highly N-doped carbons by employing k-carrageenan as precursor and alkali metal nitrate as activating agent and dopant. Remarkably, the nitrate salt assisted synthesis process leads to a high nitrogen content of 8.6