Template-Synthesized Hierarchical Porous Carbon Nanocages for High Rate Performance Supercapacitors
Abstrak
Carbon nanocages with a hierarchical structure have attracted increasing attention in recent years due to the high rate capability of supercapacitors based on such materials. In this study, cubic carbon nanocages (CNCs) with a hierarchical porous structure were prepared by using cubic magnesium oxide as a template and sucrose as the carbon source. The carbon nanocages interconnect to form 3D nanoparticles, when used as the electrode material for supercapacitors, exhibit a high specific capacitance and excellent rate capability. The specific capacitance at a current density of 50 A g-1 can reach 135 F g-1. The excellent capacitive performance of carbon nanocages is attributed to the macropores formed by the cavity inside the cages and interparticle voids, which provide a fast pathway for ion transportation by shortening the diffusion pathway for electrolyte ions. Moreover, CNCs possess good cycling stability with a capacitance retention of 96.2% after 10000 cycles.
Topik & Kata Kunci
Penulis (9)
Liang Jiang
Jing Wang
Huali Zhang
Suzhen Zhang
Xuyan Mao
Lihua Xing
Xiangyu Xu
Jie Yang
Shifeng Hou
Akses Cepat
- Tahun Terbit
- 2019
- Sumber Database
- DOAJ
- DOI
- 10.20964/2019.10.37
- Akses
- Open Access ✓