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首页> 外文期刊>Advanced Functional Materials >In Situ Construction of 3D Interconnected FeS@Fe3C@ Graphitic Carbon Networks for High-Performance Sodium-Ion Batteries
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In Situ Construction of 3D Interconnected FeS@Fe3C@ Graphitic Carbon Networks for High-Performance Sodium-Ion Batteries

机译：用于高性能钠离子电池的3D互连FeS @ Fe3C @石墨碳网络的原位构建

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摘要

Iron sulfides have been attracting great attention as anode materials for high-performance rechargeable sodium-ion batteries due to their high theoretical capacity and low cost. In practice, however, they deliver unsatisfactory performance because of their intrinsically low conductivity and volume expansion during charge-discharge processes. Here, a facile in situ synthesis of a 3D interconnected FeS@Fe3C@graphitic carbon (FeS@Fe3C@GC) composite via chemical vapor deposition (CVD) followed by a sulfuration strategy is developed. The construction of the double-layered Fe3C/GC shell and the integral 3D GC network benefits from the catalytic effect of iron (or iron oxides) during the CVD process. The unique nanostructure offers fast electron/Na ion transport pathways and exhibits outstanding structural stability, ensuring fast kinetics and long cycle life of the FeS@Fe3C@ GC electrodes for sodium storage. A similar process can be applied for the fabrication of various metal oxide/carbon and metal sulfide/carbon electrode materials for high-performance lithium/sodium-ion batteries.
机译：硫化铁由于其高理论容量和低成本而作为高性能可充电钠离子电池的负极材料备受关注。然而，实际上，由于其固有的低电导率和在充放电过程中的体积膨胀，它们提供的性能不能令人满意。在这里，开发了一种通过化学气相沉积（CVD）并随后进行硫化策略的3D互连FeS @ Fe3C @石墨碳（FeS @ Fe3C @ GC）复合材料的便捷原位合成方法。双层Fe3C / GC外壳的构造和完整的3D GC网络得益于CVD过程中铁（或氧化铁）的催化作用。独特的纳米结构提供了快速的电子/ Na离子传输路径，并具有出色的结构稳定性，从而确保了用于钠存储的FeS @ Fe3C @ GC电极的快速动力学和长循环寿命。可以将类似的方法应用于高性能锂/钠离子电池的各种金属氧化物/碳和金属硫化物/碳电极材料的制造。

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