首页|A robust in-situ catalytic graphitization combined with salt-template strategy towards fast lithium-ions storage
A robust in-situ catalytic graphitization combined with salt-template strategy towards fast lithium-ions storage
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
? 2022 Elsevier B.V.Lithium-ion hybrid supercapacitors (LIHSs) have received significant attention in electrochemical energy-related areas. However, the sluggish anode kinetics hinders the improvement of power density and cycling stability. Herein, an in-situ catalytic graphitization with a salt-template strategy was applied to prepare the porous graphitic carbon nanosheets. The results demonstrated that the addition of KCl led to a higher specific surface area and higher porous structure. The as-prepared potassium-induced porous graphitic carbon flakes (PPGCs) exhibited an electrochemical plateau capacity of 240.1 mAh g?1 and an electrochemical slope capacity of 129.0 mAh g?1. PPGCs also delivered superior rate performance of 60.8 mAh g?1 even at 5.0 A g?1, which was much better than graphitic carbon flakes (GCFs) and potassium-induced graphitic carbon flakes (PGCFs). When assembled into LIHSs devices with commercial activated carbon, the energy density reached 75.6 Wh kg?1, and the power density was as high as 5.05 kW kg?1. After 10,000 cycles at 5.0 A g?1, the energy density was maintained at 39.2 Wh kg?1, revealing excellent long-term cycling performance. This work may provide a promising solution to obtain graphitic carbon with a high graphitization degree and highly porous structure.
NSTL
Elsevier
