Abstract
The research innovatively applies “transgenic technology” to the field of bio-derived carbon materials for improving the activation efficiency. Typically, tomato is selected as a representative organism, the microscopic cell structure of tomato stems are adjusted through the expression regulation of SlHDA3 (Solanum lycopersicum Histone Deacetylases 3) gene, and the stems are further pre-carbonized (SlHDA3C) and activated with KOH to obtain porous carbon (SlHDA3KC). Optical and electron microscopic characterization demonstrate that the SlHDA3 gene successfully regulate the microscopic cell structure of tomato plant stems. The specific surface area and pore size distribution test of materials at various preparation stages further demonstrate that the SlHDA3C has higher activation efficiency with KOH compared with WTC (the pre-carbonized state of wild type tomato plant stem). The SlHDA3KC exhibits an outstanding capacitive performance of 201.6F g−1 at 1 A/g and the assembled symmetrical supercapacitor achieves a high energy density of 11 Wh kg−1 at 249 W kg−1. The study provides a new research perspective for improving the activation efficiency of bio-derived porous carbon.
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