Rational design of activated carbon nitride materials for symmetric supercapacitor applications

2018 ◽  
Vol 455 ◽  
pp. 841-848 ◽  
Author(s):  
Cheng Shen ◽  
Rongzhen Li ◽  
Lijin Yan ◽  
Yuxin Shi ◽  
Huatong Guo ◽  
...  
Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 785
Author(s):  
Tai-Feng Hung ◽  
Tzu-Hsien Hsieh ◽  
Feng-Shun Tseng ◽  
Lu-Yu Wang ◽  
Chang-Chung Yang ◽  
...  

Rational design and development of the electrodes with high-mass loading yet maintaining the excellent electrochemical properties are significant for a variety of electrochemical energy storage applications. In comparison with the slurry-casted electrode, herein, a hierarchically porous activated carbon (HPAC) electrode with higher mass loading (8.3 ± 0.2 mg/cm2) is successfully prepared. The pouch-type symmetric device (1 cell) with the propylene carbonate-based electrolyte shows the rate capability (7.1 F at 1 mA/cm2 and 4.8 F at 10 mA/cm2) and the cycling stability (83% at 12,000 cycles). On the other hand, an initial discharge capacitance of 32.4 F and the capacitance retention of 96% after 30,000 cycles are delivered from a pouch-type symmetric supercapacitor (five cells). The corresponding electrochemical performances are attributed to the fascinating properties of the HPAC and the synergistic features of the resulting electrode.


CrystEngComm ◽  
2021 ◽  
Author(s):  
Muhammad Sajjad ◽  
Yaqoob Khan

We developed a high performance SSC device with excellent electrochemical performance in terms of specific capacitance, rate capability, energy density and power density which surpasses most of the reports.


Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1646
Author(s):  
Junyi Li ◽  
Neeta Karjule ◽  
Jiani Qin ◽  
Ying Wang ◽  
Jesús Barrio ◽  
...  

Carbon nitride materials require high temperatures (>500 °C) for their preparation, which entails substantial energy consumption. Furthermore, the high reaction temperature limits the materials’ processability and the control over their elemental composition. Therefore, alternative synthetic pathways that operate under milder conditions are still very much sought after. In this work, we prepared semiconductive carbon nitride (CN) polymers at low temperatures (300 °C) by carrying out the thermal condensation of triaminopyrimidine and acetoguanamine under a N2 atmosphere. These molecules are isomers: they display the same chemical formula but a different spatial distribution of their elements. X-ray photoelectron spectroscopy (XPS) experiments and electrochemical and photophysical characterization confirm that the initial spatial organization strongly determines the chemical composition and electronic structure of the materials, which, thanks to the preservation of functional groups in their surface, display excellent processability in liquid media.


2020 ◽  
Vol 3 (7) ◽  
pp. 7016-7028
Author(s):  
Zhi Lin ◽  
Ke Wang ◽  
Xuezhao Wang ◽  
Shijia Wang ◽  
Hui Pan ◽  
...  

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