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Bamboo-structured N-doped CNTs/FeF3·0.33H2O derived from melamine as a high-performance cathode for Li-ion batteries
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2021-08-17 , DOI: 10.1039/d1nj02855c Jing Ding 1 , Xiangyang Zhou 1 , Chucheng Luo 1 , Juan Yang 1 , Jingjing Tang 1
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2021-08-17 , DOI: 10.1039/d1nj02855c Jing Ding 1 , Xiangyang Zhou 1 , Chucheng Luo 1 , Juan Yang 1 , Jingjing Tang 1
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FeF3·0.33H2O with a special one-dimension tunnel structure has been considered as a potential cathode material. However, the low electron conductivity of FeF3·0.33H2O prevents its practical application. FeF3·0.33H2O coupled with a carbon material is an effective method to solve the low electric conductivity of FeF3·0.33H2O. Hence, we apply a facile approach using the catalyzed pyrolysis of melamine and a fluorination–annealing process to synthesize the N-doped CNTs/FeF3·0.33H2O composite with a bamboo-like morphology. The as-prepared composite displays a good cycling performance with a reversible discharge capacity of 160.7 mA h g−1 at 40 mA g−1 after 100 cycles and a good rate performance, as well as a good electrochemical performance even at a relatively high mass loading. The good electrochemical properties can be mainly ascribed to the fact that N-doped CNTs play the role of a cross-linked conductive network to provide an electron-transport expressway in the active material. This simple catalyzed pyrolysis and fluorination–annealing approach provides a promising avenue for the application of iron fluoride as a cathode material.
中文翻译：
源自三聚氰胺的竹结构N掺杂CNTs/FeF3·0.33H2O作为锂离子电池的高性能正极
具有特殊一维隧道结构的FeF 3 ·0.33H 2 O已被认为是一种潜在的正极材料。然而，FeF 3 ·0.33H 2 O的低电子电导率阻碍了其实际应用。FeF 3 ·0.33H 2 O 与碳材料结合是解决 FeF 3 ·0.33H 2 O低电导率的有效方法。因此，我们采用了一种使用三聚氰胺催化热解和氟化-退火工艺的简便方法合成N掺杂的CNTs/FeF 3 ·0.33H 2O 复合物具有竹状形态。所制备的复合材料显示出良好的循环性能，100 次循环后在 40 mA g -1 下的可逆放电容量为 160.7 mA hg -1和良好的倍率性能，即使在相对较高的质量负载下也具有良好的电化学性能. 良好的电化学性能主要归因于 N 掺杂的 CNT 发挥交联导电网络的作用，为活性材料提供电子传输高速公路。这种简单的催化热解和氟化-退火方法为氟化铁作为阴极材料的应用提供了有希望的途径。
更新日期：2021-09-13
中文翻译：
源自三聚氰胺的竹结构N掺杂CNTs/FeF3·0.33H2O作为锂离子电池的高性能正极
具有特殊一维隧道结构的FeF 3 ·0.33H 2 O已被认为是一种潜在的正极材料。然而，FeF 3 ·0.33H 2 O的低电子电导率阻碍了其实际应用。FeF 3 ·0.33H 2 O 与碳材料结合是解决 FeF 3 ·0.33H 2 O低电导率的有效方法。因此，我们采用了一种使用三聚氰胺催化热解和氟化-退火工艺的简便方法合成N掺杂的CNTs/FeF 3 ·0.33H 2O 复合物具有竹状形态。所制备的复合材料显示出良好的循环性能，100 次循环后在 40 mA g -1 下的可逆放电容量为 160.7 mA hg -1和良好的倍率性能，即使在相对较高的质量负载下也具有良好的电化学性能. 良好的电化学性能主要归因于 N 掺杂的 CNT 发挥交联导电网络的作用，为活性材料提供电子传输高速公路。这种简单的催化热解和氟化-退火方法为氟化铁作为阴极材料的应用提供了有希望的途径。
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