P-Doped Modified Porous Carbon Derived from ZIF-8 for Enhanced Capacitive Performance

Congxiu Guo, Guilin Li, Yujia Wu, Xuhui Wang, Yu Niu and Jiao Wu ()
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Congxiu Guo: School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan 030006, China
Guilin Li: School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan 030006, China
Yujia Wu: School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan 030006, China
Xuhui Wang: School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan 030006, China
Yu Niu: School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan 030006, China
Jiao Wu: School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan 030006, China

Energies, 2023, vol. 16, issue 21, 1-11

Abstract: Porous carbon materials derived from ZIF-8 have attracted extensive research attention on account of their large surface area, tunable mesoporosity and abundant nitrogen content. However, directly carbonized ZIF-8 usually suffers from a low electronic conductivity, poor wettability and relatively low mesoporosity, which severely restricts their capacitive performance. Herein, P-doped modified carbon materials derived from ZIF-8 (ZPCs) were synthesized by using nontoxic phytic acid as a phosphorus source, followed by carbonization at high temperature. Benefiting from its relatively high specific surface area of 911.7 m 2 g −1 and higher ratio of mesopores, as well as N, O and P doping, ZPC-1000 delivers the largest specific capacity, up to 219.4 F g −1 at 1 A g −1 , among the prepared samples and an outstanding cycle span, retaining 100% capacity after 2000 cycles at 5 A g −1 . In this work, we highlight the strategy of constructing a synergistic effect between high mesoporosity and heteroatom doping, which can greatly boost the capacitive performance of carbon materials.

Keywords: P doping; ZIF-8; porous carbon; capacitive performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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