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- 저자 : Yuhang Jia (검색결과 2 건)
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Redox-active 2D porous organic polymers for high-performance supercapacitor
Daping Hu,Yuhang Jia,Shaopei Yang,Fuyao Huang,Yuman Dong,Pengcheng Du 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.123 No.-
Porous organic polymers (POPs) have been received considerable attention due to their advantages oflarge surface areas, good stability and functionalities, which are considered an ideal electrode materialfor the energy storage device that has been developed and applied in lithium batteries, zinc ion batteriesand supercapacitors. Here we describe the synthesis of four kinds of redox-active 2D POPs via solvothermalSchiff base condensation using aniline oligomers with different chain lengths as building units thatexhibit reversible electrochemical processes. Among them, the Tp-AT-POP based on 1,3,5-triformylphloroglucinol (Tp) and aniline trimer (AT) deliver high electrochemical performance mainlycontributed by redox units exhibiting high specific capacitance up to 348.3 F/g at a current density of0.5 A/g and possessing excellent cycling stability of 71% after 5000 cycles. In addition, the Tp-AT-POPis developed to assemble a symmetric supercapacitor with specific capacitances of 167 F/g at 0.3 A/gand good cycling stability. This work provides an efficient strategy for developing the redox-active 2DPOPs with aniline oligomer structure for the next-generation advanced high-performance energy storagedevice.
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Fuyao Huang,Yuhang Jia,Shaopei Yang,Yuhong Long,Yuman Dong,Pengcheng Du 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.128 No.-
Transition metal phosphides (TMPs) have been widely recognized as an ideal choice for supercapacitors(SCs) due to exceptional pseudocapacitance performance. Otherwise, reasonable structural design ofTMPs can overcome the defects of low rate performance and poor cycle life. Furthermore, the incorporationof carbon materials can enhance electronic conductivity, thereby enabling rapid electron transmission. Herein, we present a novel hierarchical carbon layer coated NiCoP nanoparticles embedded onnitrogen-doped carbon nanotubes (NiCoP/NCNTs), synthesized through a calcination/phosphorizationprocess. By incorporating a carbon layer to anchor nanoscale NiCoP, an increased number of active sitesand improved structural stability are achieved. Furthermore, the presence of NCNTs enhances the electronicconductivity. These combined features result in impressive performance, with NiCoP/NCNTsexhibiting an impressive specific capacitance of 1628.4 F/g at 1 A/g, and good rate capability of 78.5 %up to 50 A/g. Moreover, it also exhibits outstanding cycling stability, maintaining a capacitance retentionof 71.4% after 10 000 cycles. Moreover, the asymmetric SCs based on NiCoP/NCNTs and AC deliver a highenergy density of 45.46 Wh/kg, and exhibit excellent cycling stability of 92.5% after 5000 cycles. Theseresults highlight the potential of NiCoP/NCNTs as a novel battery-type electrode material for energystoragedevices.
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