Template‐Free Synthesis of Hierarchical Composite Nanotubes with Superior Lithium and Sodium Storage Performance. Issue 3 (27th January 2020)

• Record Type: Journal Article
• Authors: Yang, Zunxian; Huang, Jianhua; Zhang, Yufei; Ye, Bingqing; Lin, Shimin; Liu, Jiahui; Ye, Yuliang; Zheng, Kang; Lu, Ganzhen; Guo, Tailiang; Yu, Xuebin
• Is Part Of: Energy technology. Volume 8:Issue 3(2020:Mar.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-01-27
• Subjects: CeO2@C@MoS2 nanotubes -- core/shell architectures -- lithium-/sodium-ion batteries -- solution soaking -- structure stabilization; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201901356
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : 2D transition metal disulfides are one of the most preferred materials for lithium‐/sodium‐ion batteries (LIBs). However, complex processes and structural instability during cycling are challenges faced. Herein, the hierarchical composite nanotubes CeO2 @C@MoS2 (MS/CNTs) are prepared by electrostatic spinning, followed by a simple carbon coating method. The as‐prepared composite nanotubes with self‐assembled layer structures are characterized by a more stable structure compared with traditional nanofibers due to the existence of a dense skeleton. As a result of the stable framework structure, MS/CNTs exhibit excellent electrochemical performance in LIBs (1002 mA hg −1 at 0.1 A g −1 and 690 mA hg −1 at 1 A g −1 after 500 cycles) and super‐long cyclic stability and electrochemical performance (550 mA hg −1 at 2 A g −1 after 2400 cycles). MS/CNTs also show excellent storage performance in sodium batteries (440 mA hg −1 at 0.5 A g −1, 400 mA hg −1 at 1 A g −1 ). The stability of MoS2 nanotubes is effectively improved by chemical and physical methods, mainly due to the support of the CeO2 @C, metal–organic framework (MOF) tube skeleton, which avoids the shedding of nanotubes after cycling, maintaining a unique structural topography even after 500 cycles. Abstract : A new and simpler preparation method for layered nanotubes is reported. The composite CeO2 @C@MoS2 nanotubes are characteristics of stable mechanical properties and architectures as well as excellent electrochemical properties. The stability of nanotubes is improved by chemical and physical methods.