Abstract Activated carbon was synthesized by a simple one-step calcination of deoxygenated agar in a hot KOH aqueous solution, in which KOH plays both deoxidant and activation agent. The deoxygenation course omits high temperature carbonization in the conventional technology and leads to molecular level activation of agar in subsequent one-step calcination. The one-step activated carbon has superior specific surface area of 1672 m2 g−1 and total pore volume of 0.81 cm3 g−1. It also shows a maximum specific capacitance of 226 F g−1 in the KOH electrolyte, which is 1.4 times as high as that for the activated carbon by the conventional two-step method. This study provides potentially economical and effective means for the production of commercial activated carbon with high porosity for supercapacitors.

中文翻译：

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用于高性能超级电容器的琼脂分子级一步活化活性炭

摘要 活性炭是通过脱氧琼脂在热的 KOH 水溶液中一步简单煅烧合成的，其中 KOH 既是脱氧剂又是活化剂。脱氧过程省去了常规技术中的高温碳化，在后续一步煅烧中使琼脂在分子水平上活化。一步法活性炭具有 1672 m2 g-1 的优异比表面积和 0.81 cm3 g-1 的总孔容。它还显示 KOH 电解质中的最大比电容为 226 F g-1，是传统两步法活性炭的 1.4 倍。该研究为生产用于超级电容器的高孔隙率商业活性炭提供了潜在的经济和有效的手段。