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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Optimized nitrogen-doped carbon with a hierarchically porous structure as a highly efficient cathode for Na-O-2 batteries
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Optimized nitrogen-doped carbon with a hierarchically porous structure as a highly efficient cathode for Na-O-2 batteries

机译：优化的氮掺杂碳，具有分层多孔结构，可作为Na-O-2电池的高效阴极

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Development of an efficient air cathode for metal-air batteries composed of an element that is abundant on earth is a scientific and technical challenge. Here, nitrogen (N)-doped carbon cathodes were prepared using two conventional doping methods, namely ammonia activation (ammoxidation) and introduction of an N-containing precursor. Interestingly, the introduction of N-containing precursors to prepare the N-doped carbon material not only gave a different pore distribution with increased surface area but also maintained considerable N content, unlike the use of the ammoxidation method - thus greatly enhancing the catalytic activity (low overpotential) and improving the discharge capacity (6905 mA h g(-1)) and cycle life (from 8 to 66 cycles) in sodium-oxygen batteries compared with the pure carbon material. This study also stresses the importance of adopting the optimized synthesis method to prepare the N-doped carbon cathode.
机译：对于由金属元素丰富的金属空气电池开发高效的空气阴极是一项科学技术挑战。在此，使用两种常规的掺杂方法，即氨活化（氨氧化）和引入含氮前驱物，制备了掺杂氮（N）的碳阴极。有趣的是，与使用氨氧化方法不同，引入含氮前驱物以制备掺氮碳材料不仅具有增加的表面积而产生了不同的孔分布，而且保持了相当可观的氮含量-从而大大提高了催化活性（与纯碳材料相比，钠氧电池的放电容量（6905 mA hg（-1））和循环寿命（从8到66个循环）得以改善。这项研究还强调了采用优化的合成方法制备N掺杂碳阴极的重要性。

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