Glucose derived ionothermal carbons with tailor-made porosity

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• 作者：Jonas Pampel ; Caleb Denton ; Tim-Patrick Fellinger ; ^{Fellinger@mpikg.mpg.de" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Carbon
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：107
• 期：Complete
• 页码：288-296
• 全文大小：2729 K

文摘

An ionothermal synthesis strategy to obtain a set of glucose derived carbons with tailored pore system is demonstrated. The biomass derived materials possess high surface areas and large total pore volumes with values up to 2160 m² g⁻¹ and 1.74 cm³ g⁻¹, respectively. The tailoring of the pore system is realized by simply changing the molar composition of the KCl/ZnCl₂ mixture which serves as combined solvent-porogen. Increasing KCl contents result in a continuous pore opening and rising pore volume leading to enhanced mass transport porosity. Those effects are accompanied by a linear decrease of the specific surface area which allows for the preparation of porous carbons of high and predictable surface areas between 2160 and 960 m² g⁻¹. Experiments exemplarily shown for the application as supercapacitor electrodes, the different materials show a decreased gravimetric capacity, but enhanced capacity retention as well as improved areal capacity with increased KCl content nicely supporting the improved mass transport properties.