Influence of Different Activators on the Structure and Properties of Activated Carbon Based on Bamboo Fiber

In order to explore the influence of different activators on the structure and properties of the prepared activated carbon, bamboo fiber-based activated carbons (BFACs) were prepared by four activators of phosphoric acid, pyrophosphoric acid, zinc chloride, and diammonium biphosphate (BFAC-H₃PO₄, BFAC-H₄P₂O₇, BFAC-ZnCl₂, and BFAC-(NH₄)₂HPO₄) and BFACs adsorption performance and electrochemical properties were investigated. The main conclusions were: the specific surface area of the four BFACs varies greatly, among which BFAC-ZnCl₂ was the highest, at 1908.5074 m²/g, and BFAC-(NH₄)₂HPO₄ was the lowest, at 641.5941 m²/g. In terms of the pore structure, BFAC-H₃PO₄ and BFAC-H₄P₂O₇ are mainly mesopores and BFAC-ZnCl₂ and BFAC-(NH₄)₂HPO₄ are mainly micropores. The BFAC-ZnCl₂ sample had the largest specific capacitance, with a specific capacitance of 121.2730 F/g at a current density of 0.2 A/g, with a small internal resistance and good electrochemical reversibility and capacitance performance. The adsorption properties were better for BFAC-ZnCl₂ and BFAC-H₃PO₄ and the adsorption amounts were 648.75 and 548.75 mg/g, respectively.