Double-shell SnO2@Fe2O3 hollow spheres as a high-performance anode material for lithium-ion batteries. Issue 7 (29th January 2020)

• Record Type: Journal Article
• Authors: Cui, Zhipeng; Sun, Meng; Liu, Huanqing; Li, Sijie; Zhang, Qingye; Yang, Chengpeng; Liu, Guiju; Zhong, Junyu; Wang, Yiqian
• Is Part Of: CrystEngComm. Volume 22:Issue 7(2020)
• Page Start: 1197
• Page End: 1208
• Publication Date: 2020-01-29
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c9ce01621j
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Construction of novel electrode materials is an effective way to enhance the electrochemical performance of lithium ion batteries (LIBs). Abstract : Construction of novel electrode materials is an effective way to enhance the electrochemical performance of lithium ion batteries (LIBs). In this work, double-shell SnO2 @Fe2 O3 hollow spheres are fabricated through a simple template method. It is revealed that the α-Fe2 O3 nanorods are heterogeneously assembled on the surfaces of hollow SnO2 spheres. The double-shell SnO2 @Fe2 O3 hollow spheres, as an anode material for LIBs, demonstrate excellent lithium storage capacity and cycling stability. Their discharge specific capacity decreases to 464 mA h g −1 for the 46th cycle at a current density of 100 mA g −1, and then increases significantly to 1043 mA h g −1 up to the 190th cycle. Compared with SiO2 @SnO2 (221 mA h g −1 after 190 cycles) and SnO2 (336 mA h g −1 after 190 cycles) electrodes, the better electrochemical performance of the SnO2 @Fe2 O3 electrode is ascribed to its hierarchical hollow urchin-like structure, the SnO2 @Fe2 O3 heterojunctions and the oxygen vacancies in the α-Fe2 O3 nanorods. The sea urchin-like heterostructures dramatically inhibit the agglomeration and prevent the volume expansion during the cycling process. This work provides a novel way to construct a promising material with enhanced performance as an anode for LIBs.