Facile coupling MnS nanoparticles with nitrogen, sulfur-doped carbon microsheet with improved Li-storage performance

Authors：Feng, Shuyi; Chen, Bingyi; Chen, Haiyan; Yang, Jielian; Ma, Lin^*; Zhang, Ying; Li, Haiyong; Zeng, Shiwen; Xu, Limei^*

Source：IONICS, 2023, 29(7): 2637-2646.

DOI：10.1007/s11581-023-05059-y

• Manganese sulfide
• Li-storage
• Negative electrode
• Carbon materials

Considering its relatively large specific capacity along with low cost advantages, manganese sulfide (MnS) emerges as a competitive lithium-ion host material. However, some excruciating issues such as inevitable volume expansion and inherent insufficient conductivity always result in a low specific capacity, limited cycling life and poor rate capability. Rational morphology and structure design is vital to achieve superior Li-storage performance. Herein, a heterostructured composite with small MnS embedded on glycine-derived N, S-doped amorphous carbon sheets (MnS@NSC) has been synthesized through an annealing and sulfuration route. MnS nanoparticles are well confined by carbon matrix, which is conductive to an effective suppression on volume change and reservation of integrated structure. Meanwhile, porous carbon framework supplies desirable expressway for fast electron delivery and reduces the distance for lithium ions diffusion. Consequently, the MnS@NSC anode delivers a remarkably elevated lithium-storage performance.