SnS@C nanoparticles anchored on graphene oxide as high-performance anode materials for lithium-ion batteries

作者：Jing Mei, Jinlu Han, Fujun Wu, Qichang Pan, Fenghua Zheng, Juantao Jiang, Youguo Huang, Hongqiang Wang, Kui Liu, Qingyu Li · 发表于：Frontiers in Chemistry · 年份：2023 · DOI：10.3389/fchem.2022.1105997 · 被引用次数：22 · 研究领域：Advancements in Battery Materials、Supercapacitor Materials and Fabrication、Advanced Battery Materials and Technologies

Tin (II) sulfide (SnS) has been regarded as an attractive anode material for lithium-ion batteries (LIBs) owing to its high theoretical capacity. However, sulfide undergoes significant volume change during lithiation/delithiation, leading to rapid capacity degradation, which severely hinders its further practical application in lithium-ion batteries. Here, we report a simple and effective method for the synthesis of SnS@C/G composites, where SnS@C nanoparticles are strongly coupled onto the graphene oxide nanosheets through dopamine-derived carbon species. In such a designed architecture, the SnS@C/G composites show various advantages including buffering the volume expansion of Sn, suppressing the coarsening of Sn, and dissolving Li 2 S during the cyclic lithiation/delithiation process by graphene oxide and N-doped carbon. As a result, the SnS@C/G composite exhibits outstanding rate performance as an anode material for lithium-ion batteries with a capacity of up to 434 mAh g −1 at a current density of 5.0 A g −1 and excellent cycle stability with a capacity retention of 839 mAh g −1 at 1.0 A g −1 after 450 cycles.