Chinese Journal of Applied Chemistry ›› 2025, Vol. 42 ›› Issue (7): 945-954.DOI: 10.19894/j.issn.1000-0518.240330

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Preparation of Porous Carbon Materials Derived from Rhus typhina Leaves and Their Electrochemical Properties

Li-Hui ZHENG1,2(), Bo-Ao DU1,2   

  1. 1.College of Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318,China
    2.Qinhuangdao College of Northeast Petroleum University,Qinhuangdao 066004,China
  • Received:2024-10-20 Accepted:2025-05-12 Published:2025-07-01 Online:2025-07-23
  • Contact: Li-Hui ZHENG
  • About author:zhenglihui@nepu.edu.cn
  • Supported by:
    the Natural Science Foundation of Hebei Province Project(B2024107002)

Abstract:

Porous carbon materials with different mass ratios were successfully prepared from Rhus typhina leaves as carbon source and K2CO3 as activating agent via a two-step“carbonization-activation” method, and denoted as TLPC-xx=0, 1, 2, 3, 4, where x represents the mass ratio of activator to carbon source). The morphology and structure of the as-prepared materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) surface area analysis. Electrochemical performances were evaluated through cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) tests, and other electrochemical measurements. The results suggest that K2CO3 exhibits an excellent pore-forming property. TLPC-3 displays the most well-developed pore structure with a high specific surface area of up to 2193.9 m2/g. In a three-electrode system, TLPC-3 delivers a specific capacitance of 287.8 F/g at a current density of 0.5 A/g, which is 3.2 times higher than that of TLPC-0. In a two-electrode system, the material delivers an energy density of 8.05 Wh/kg at a power density of 125 W/kg. Moreover, even after 10000 GCD cycles at a current density of 10 A/g, it retains 98.7% of its initial capacitance.

Key words: Rhus typhina leaves, Porous carbon, K2CO3 activation, Supercapacitors

CLC Number: