A multifunctional graphene oxide-Zn(II)-triazole complex for improved performance of lithium-sulfur battery at low temperature. (1st May 2018)

• Record Type: Journal Article
• Authors: Zhang, Zengqi; Wang, Yanqing; Liu, Jian; Sun, Deye; Ma, Xiaodi; Jin, Yongcheng; Cui, Yongjie
• Is Part Of: Electrochimica acta. Volume 271(2018)
• Page Start: 58
• Page End: 66
• Publication Date: 2018-05-01
• Subjects: Graphene oxide -- Cathode materials -- Polysulfide immobilization -- Low temperature -- LiS battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.03.130
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Although performance of LiS batteries with various carbon/sulfur composites has been wildly explored at room temperature, the reports studying the behaviors of LiS cathodes at low temperature are few. Herein, a novel multifunctional graphene oxide-Zn(II)-triazole complex (denoted as GO-Zn(II)-AmTZ) with excellent property at low temperature(-20 °C) is successfully prepared. In GO-Zn(II)-AmTZ, the metal ions (Zn(II)), amine groups and the N penta-heterocycle are introduced synchronously, leading improvement of LiS performance at both room and low temperature. As a result of the multifunctional arrangement, GO-Zn(II)-AmTZ cathodes could provide a discharge capacity of 315 mAh g −1 (0.5C) after 100 cycles at −20 °C. A capacity of ∼520 mAh g −1 is achieved over 300 cycles at room temperature with low capacity attenuation rate at current rate of 0.5C. The improved performance is speculated to the contribution of enhanced polysulfide immobilization of GO-Zn(II)-AmTZ modified by the Zn(II), amine groups and the N atoms. Graphical abstract: A novel multifunctional graphene oxide-Zn(II)-triazole complex was prepared and used as host material in LiS cathode to improve the performance of LiS battery at −20 °C and room temperature.