Recently, Professor Fan Xiaoyong and Professor Li Donglin have made great progress in the construction of 3D copper nanoarrays and their application as collectors of sodium ion batteries. The full text of the related research results was published in《Advanced Energy Materials》(IF=24.884), a top international journal in the field of materials science.
Alloying electrodes are regarded as promising anodes for lithium/sodium storage thanks to their multielectron reaction capacity, moderate voltage plateau, and high electrical conductivity. However, huge volume change upon cycling, especially for sodium storage, usually causes the loss of electrical connection between active components and their delaminations from traditional current collectors, thus leading to rapid capacity decay. Herein, a unique 3D current collector is assembled from 1D nanowire arrays anchored on 3D porous Cu foams for constructingcore‐shelled Cu@Sb nanowires as advancedsodium‐ion battery (SIB) anodes. Theso‐formed hierarchical 3D anode with interconnected 3D micrometer sized pores and abundant voids between nanowires not only effectively accommodates the structural strains during repeated cycling but also ensures the structural integrity and contributes to a uniform ion/electron scattered distribution throughout the whole surface. When employed as anodes for SIBs, the obtained electrode shows a high capacity of 605.3 mAhg−1at 330 mAg−1, and demonstrates a high capacity retention of 84.8% even at a high current density of 3300 mAg−1. The 3D nanowire arrayed Cu current collector in this work can offer a promising strategy for designing and building advanced alloy anodes for lithium/sodiumstorage.
This paper is completed by Chang'an university in cooperation with Hunan University, Waterloo University, Canada and other well-known universities at home and abroad. Chang'an University is the first communication unit, Professor Fan Xiaoyong is the first author of the thesis, and Master student Han Jiaxing is the second author; Professor Fan Xiaoyong, Professor Li Donglin, Professor Ding Yuanli of Hunan University and Professor Chen Zhongwei of Waterloo University (Academician of Canadian Engineering) are the co-authors. Professor Gou Lei also made valuable suggestions for the work. Jiang Zhen and Zeng Xiangtian (now studying at the Shenzhen Research Institute of Tsinghua University), Deng Ya-ping and Dr Luo Dan of Waterloo University in Canada also participated in thework.
Links to this paper：https://onlinelibrary.wiley.com/doi/10.1002/aenm.201900673.
