A Copper Silicide Nanofoam Current Collector for Directly Grown Si Nanowire Networks and their Application as Lithium‐Ion Anodes,Advanced Functional Materials

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A Copper Silicide Nanofoam Current Collector for Directly Grown Si Nanowire Networks and their Application as Lithium‐Ion Anodes
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-07-23 , DOI: 10.1002/adfm.202003278
Ibrahim Saana Aminu _{1,

2} , Hugh Geaney _{1,

2} , Sumair Imtiaz _{1,

2} , Temilade E. Adegoke _{1,

2} , Nilotpal Kapuria _{1,

2} , Gearoid A. Collins _{1,

2} , Kevin M. Ryan _{1,

2}

Affiliation

Silicon nanowires (Si NWs) have been identified as an excellent candidate material for the replacement of graphite in anodes, allowing for a significant boost in the capacity of lithium‐ion batteries (LIBs). Herein, high‐density Si NWs are grown on a novel 3D interconnected network of binary‐phase Cu‐silicide nanofoam (3D Cu_xSi_y NF) substrate. The nanofoam facilitates the uniform distribution of well‐segregated and small‐sized catalyst seeds, leading to high‐density/single‐phase Si NW growth with an areal‐loading in excess of 1.0 mg cm⁻² and a stable areal capacity of ≈2.0 mAh cm⁻² after 550 cycles. The use of the 3D Cu_xSi_y NF as a substrate is further extended for Al, Bi, Cu, In, Mn, Ni, Sb, Sn, and Zn mediated Si NW growth, demonstrating the general applicability of the anode architecture.

中文翻译：

直接生长的硅纳米线网络的硅化铜纳米泡沫集电器及其在锂离子阳极中的应用

硅纳米线（Si NWs）被认为是替代阳极中石墨的极佳候选材料，从而大大提高了锂离子电池（LIB）的容量。在此，高密度的硅纳米线生长在新型的二元相双相硅化硅纳米泡沫（3D Cu _x Si _y NF）衬底的3D互连网络上。纳米泡沫有利于均匀分散的小尺寸催化剂种子的均匀分布，从而导致高密度/单相硅纳米线的生长，面载荷超过1.0 mg cm ^-2，稳定的面容量约为2.0 550次循环后，mAh cm ^-2。3D Cu _x Si _y的使用 NF作为衬底进一步扩展为Al，Bi，Cu，In，Mn，Ni，Sb，Sn和Zn介导的Si NW生长，这证明了阳极体系结构的普遍适用性。

更新日期：2020-09-18

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