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<p>Activated carbons with high micro-/meso-porosity derived from biomass are increasingly popular as sustainable materials. However, these carbons often struggle with low carbon content and limited structural stability. Here, we present Mongolian anthracite-based carbons synthesized via carbonization and chemical activation. Structural analysis shows that <i>Act</i>-MRA samples develop plate-like morphologies with reduced particle size and greater porosity as KOH content increases. The <i>Act</i>-MRA samples have a disordered carbon structure with small graphitic domains, even at higher KOH ratios without significant crystal defects. Notably, <i>Act</i> -MRA3 displays a large specific surface area and high pore volume, with well-developed micropores (7–20&#xa0;Å) and mesopores (20–50&#xa0;Å) that expand as KOH ratios rise. Electrochemical tests indicate that <i>Act</i> -MRA3 achieves high specific capacitance (220.6 F/g at 5&#xa0;mV/s) and rate retention (~ 80% at 300&#xa0;mV/s), owing to its optimized pore structure and enhanced ion transport. These findings underscore the importance of tailored pore structures and defect engineering in boosting activated carbon performance for energy storage.</p>

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Control of microspores of anthracite-based activated carbons for high-performance capacitors

  • 期刊论文

  • 发表日期：

    2025年9月25日

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  • Taeyoung Park,
  • Jang Hee Kim,
  • Hyeon Ji Jeong,
  • Kwang Hyun Park,
  • Jungmo Kim,
  • Sung Ho Song,
  • Wang-Geun Shim

摘要

Activated carbons with high micro-/meso-porosity derived from biomass are increasingly popular as sustainable materials. However, these carbons often struggle with low carbon content and limited structural stability. Here, we present Mongolian anthracite-based carbons synthesized via carbonization and chemical activation. Structural analysis shows that Act-MRA samples develop plate-like morphologies with reduced particle size and greater porosity as KOH content increases. The Act-MRA samples have a disordered carbon structure with small graphitic domains, even at higher KOH ratios without significant crystal defects. Notably, Act -MRA3 displays a large specific surface area and high pore volume, with well-developed micropores (7–20 Å) and mesopores (20–50 Å) that expand as KOH ratios rise. Electrochemical tests indicate that Act -MRA3 achieves high specific capacitance (220.6 F/g at 5 mV/s) and rate retention (~ 80% at 300 mV/s), owing to its optimized pore structure and enhanced ion transport. These findings underscore the importance of tailored pore structures and defect engineering in boosting activated carbon performance for energy storage.