新型炭材料2022，Vol.37Issue(1)：259-276,18.DOI:10.1016/S1872-5805(22)60585-7
甘氨酸衍生的双介孔掺氮有序介孔炭用于超级电容器和氧气还原
Glycine-derived nitrogen-doped ordered mesoporous carbons with a bimodal mesopore size distribution for supercapacitors and oxygen reduction
摘要
Abstract
Nitrogen-doped carbon materials are promising for electrochemical energy storage and conversion. Dopant control and pore engineering play important roles in improving their performance. We have synthesized nitrogen-doped ordered mesoporous carbons (N-OMCs) with a bimodal mesopore size distribution using a solvent-free nanocasting method. The simplest amino acid (glycine, Gly) was used as the only carbon precursor and ordered mesoporous silica SBA-15 as the hard template. The confined pyrolysis of Gly in SBA-15 leads to efficient carbonization, nitrogen doping and an interesting structure. The N-OMCs have high surface areas (923–1374 m2·g?1), large pore volumes (1.32–2.21 cm3·g?1), a bimodal distribution of mesopore sizes (4.8 and 6.2–20 nm) and high nitrogen contents (3.66％–12.23％). The effects of the Gly/SBA-15 mass ratio (1–3) and carbonization temperature (700– 1000 °C) on the physicochemical properties of the N-OMCs were studied. When used as electrode materials the N-OMCs have a high performance in supercapacitors. A typical sample has a large specific capacitance of 298 F·g?1, a good rate capability (70％ retention at 30 A·g?1) and high stability. The different capacitances and rate capabilities of the N-OMCs are discussed by correlating them with their physicochemical properties. A balance of surface area, degree of graphitization, nitrogen doping, and an open mesoporous structure is essential to achieve the best performance. The N-OMCs also have a good performance in the electrocatalytic oxygen reduction reaction. A typical sample has a high onset of 0.92 V, a high half-wave potential of 0.83 V and a large limiting current density of 5.06 mA·cm?2.关键词
介孔炭/纳米浇筑/氮掺杂/甘氨酸/超级电容器/氧气还原Key words
Mesoporous carbon/Nanocasting/Nitrogen doping/Glycine/Supercapacitor/Oxygen reduction分类
化学化工引用本文复制引用
邵颖,胡泽宇,姚艳,卫翔茹,高兴敏,吴张雄..甘氨酸衍生的双介孔掺氮有序介孔炭用于超级电容器和氧气还原[J].新型炭材料,2022,37(1):259-276,18.基金项目
We appreciate the financial support from the Na-tional Natural Science Foundation of China(21875153,21501125),the Natural Science Founda-tion of Jiangsu Province(BK20150312),and the Ji-angsu Shuangchuang Team Program.We also thank the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions for support.We thank Ms.GUO Ya at Soochow University for ex-perimental assistance.国家自然科学基金项目(21875153,21501125) （21875153,21501125）
江苏省自然科学基金项目(BK20150312) （BK20150312）
江苏省双创团队资助项目 （）
江苏省高校优势学科经费(PAPD). （PAPD）
