Details

Autor(en) / Beteiligte

• Ramachandran, K.
• Subburam, Gokila
• Liu, Xian-Hu
• Huang, Ming-Gang
• Xu, Chun
• Ng, Dickon H. L.
• Cui, Ying-Xue
• Li, Guo-Chun
• Qiu, Jing-Xia
• Wang, Chuan
• Lian, Jia-Biao

Titel

Nitrogen-doped porous carbon nanofoams with enhanced electrochemical kinetics for superior sodium-ion capacitor

Ist Teil von

• Rare metals, 2022-07, Vol.41 (7), p.2481-2490

Ort / Verlag

Beijing: Nonferrous Metals Society of China

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Many electrochemical energy storage devices, such as batteries, supercapacitors, and metal ion capacitors, rely on effective and inexpensive electrode materials. Herein, we have developed highly active nitrogen-doped porous carbon nanofoams (NPCNs-600-N) for sodium-ion capacitors (SICs). NPCNs-600-N have a highly porous framework, extended interlayer spacing (0.41 nm), and lots of surface functional groups. Accordingly, NPCNs-600-N achieves a high reversible capacity (301 mAh·g −1 at 0.05 A·g −1 ), superior rate capability (112 mAh·g −1 at 5.00 A·g −1 ), and ultra-stable cyclability. The excellent rate and cycling performance originate from the abundant active sites and porous architecture of NPCNs-600-N. Furthermore, SICs device is constructed by employing the NPCNs-600-N as the battery-like anode and commercial superconductive carbon black as the capacitive cathode, which delivers high energy/power densities of 92 Wh·kg −1 /15984 W·kg −1 with a remarkable cyclability (93% retention over 5000 cycles at 1.00 A·g −1 ). The methodology of the work enables the simultaneous tuning of the porous architectures and surface function groups of carbon for high-performance SICs. Graphical abstract