Growth of copper oxide nanocrystals in metallic nanotubes for high performance battery anodes. Issue 48 (18th November 2016)

• Record Type: Journal Article
• Authors: Zhao, Yuxin; Mu, Shanjun; Sun, Wanfu; Liu, Quanzhen; Li, Yanpeng; Yan, Zifeng; Huo, Ziyang; Liang, Wenjie
• Is Part Of: Nanoscale. Volume 8:Issue 48(2016)
• Page Start: 19994
• Page End: 20000
• Publication Date: 2016-11-18
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c6nr07292e
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Nanotubes and encapsulated nanocrystals have been integrated as high-performance anode materials by utilization of the Kirkendall effect and plasma treatment. Abstract : A rational integration of 1D metallic nanotubes and oxide nanoparticles has been demonstrated as a viable strategy for the production of both highly stable and efficient anodes for lithium ion batteries. We encapsulated copper oxide (CuO) nanoparticles in ultra-long metallic copper nanotubes with engineered interspaces, and explored their electrochemical properties. Such a hierarchical architecture provides three important features: (i) a continuous nanoscale metallic Cu shell to minimize electronic/ionic transmitting impedance; (ii) a unique quasi-one-dimensional structure with a large aspect ratio to reduce self-aggregation; (iii) free space for volume expansion of CuO nanoparticles and stable solid–electrolyte interphase (SEI) formation. The anode materials with such hierarchical structures have high specific capacity (around 600 mA h g −1 at a current density of 0.1 A g −1 ), excellent cycling stability (over 94% capacity retention after 200 cycles) and superb reversible capacity of 175 mA h g −1 at a high charging rate of 15 A g −1 .