Metal–Organic Framework Derived Fe7S8 Nanoparticles Embedded in Heteroatom‐Doped Carbon with Lithium and Sodium Storage Capability,Small Methods

当前位置： X-MOL 学术 › Small Methods › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Metal–Organic Framework Derived Fe7S8 Nanoparticles Embedded in Heteroatom‐Doped Carbon with Lithium and Sodium Storage Capability
Small Methods ( IF 10.7 ) Pub Date : 2020-10-26 , DOI: 10.1002/smtd.202000637
Huihua Li _{1,

2} , Yuan Ma _{1,

2} , Huang Zhang _{1,

2} , Thomas Diemant _{1,

3} , R. Jürgen Behm _{1,

3} , Alberto Varzi _{1,

2} , Stefano Passerini _{1,

2}

Affiliation

Iron sulfides are promising materials for lithium‐ and sodium‐ion batteries owing to their high theoretical capacity and widespread abundance. Herein, the performance of an iron sulfide‐carbon composite, synthesized from a Fe‐based metal–organic framework (Fe‐MIL‐88NH₂) is reported. The material is composed of ultrafine Fe₇S₈ nanoparticles (<10 nm in diameter) embedded in a heteroatom (N, S, and O)‐doped carbonaceous framework (Fe₇S₈@HD‐C), and is obtained via a simple and efficient one‐step sulfidation process. The Fe₇S₈@HD‐C composite, investigated in diethylene glycol dimethyl ether‐based electrolytes as anode material for lithium and sodium batteries, shows high reversible capacities (930 mAh g⁻¹ for lithium and 675 mAh g⁻¹ for sodium at 0.1 A g⁻¹). In situ X‐ray diffraction reveals an insertion reaction to occur in the first lithiation and sodiation steps, followed by conversion reactions. The composite electrodes show rather promising long‐term cycling stability and rate capability for sodium storage in glyme electrolyte, while an improved rate capacity and long‐term cycling stability (800 mAh g⁻¹ after 300 cycles at 1 A g⁻¹) for lithium can be achieved using conventional carbonates.

中文翻译：

金属有机框架衍生的Fe7S8纳米颗粒嵌入杂原子掺杂的碳中，具有锂和钠的存储能力

硫化铁由于其较高的理论容量和广泛的丰度，是锂和钠离子电池的有前途的材料。本文报道了由铁基金属有机骨架（Fe-MIL-88NH ₂）合成的硫化铁-碳复合材料的性能。该材料由嵌入到杂原子（N，S和O）掺杂的碳质骨架（Fe ₇ S ₈ @ HD‐C）中的超细Fe ₇ S ₈纳米颗粒（直径< 10 nm ）组成，并通过简单高效的一步硫化工艺。铁₇ S ₈@ HD-C复合物，在研究了二甘醇二甲醚为基础的电解质作为锂和钠电池，表现出高的可逆容量（930毫安克阳极材料^-1锂和675毫安克^-1钠在0.1 A克^-1）。原位X射线衍射揭示了在第一步锂化和糖化步骤中发生的插入反应，然后发生转化反应。复合电极显示出相当有希望的长期循环用于存储钠在甘醇二甲醚电解质稳定性和倍率性能，而改进的速率容量和长期循环稳定性（800毫安克^-1后1 A G 300次循环^-1）锂使用常规碳酸盐可以实现。

更新日期：2020-12-03

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文