Engineering honeycomb-like carbon nanosheets encapsulated iron chalcogenides: Superior cyclability and rate capability for sodium ion half/full batteries. (1st November 2022)

• Record Type: Journal Article
• Authors: Sun, Zhonghui; Shi, Wenjun; Chen, Jiayi; Gu, Zhenyi; Lai, Shan; Gan, Shiyu; Xie, Jiashuo; Li, Qiuyu; Qu, Dongyang; Wu, Xing-Long; Cui, Xiaoqing; Han, Dongxue; Niu, Li
• Is Part Of: Electrochimica acta. Volume 431(2022)
• Publication Date: 2022-11-01
• Subjects: Iron chalcogenide -- Carbon nanosheets -- "Chemical-blowing" strategy -- Sodium-ion batteries; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2022.141084
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Metal chalcogenide-based anodes have attracted extraordinary attention for rechargeable sodium-ion batteries (SIBs) due to their cost-effectiveness and relatively high theoretical capacities. However, they usually exhibit poor electrochemical performance due to large volume change and low ionic/electronic conductivity. Herein, an effective strategy is developed to fabricate nitrogen doping 3D honeycomb-like carbon nanosheets-wrapped FeS nanoparticles for SIB anodes with outstanding sodium storage performance. As a result, FeS@NC anode exhibits high sodium ion storage capacity of 666.0 mAh g −1 at a current density of 0.1 A g −1, excellent rate capability of 617.3 mAh g −1 at 2 A g −1 and superior cycling stability. Moreover, the FeS@NC anode in a full-cell configuration shows high cyclic stability (no capacity attenuation over 200 cycles with 99.9% coulombic efficiency). Accordingly, this work provides a new avenue to construct high-performance anode materials for SIBs.