近日，实验室罗佳同学、尹红老师关于以聚乙烯吡咯烷酮（PVP）和氮化碳（g-C₃N₄）为碳源，通过紧密结合的机理合成了点腔状碳包覆的SnS纳米管（CN/SnS）显著提高储能性能的论文发表在Joutnal Of Energy Storage.

Tin monosulfide (SnS) is known as a prospective anode material for lithium/sodium ion batteries due to its high capacity, low cost, and easy preparation. Carbon coating is a powerful strategy to improve poor electronic conductivity and alleviate the large volume expansion of the SnS, thus achieving high electrochemical performances. However, the commonly used carbon coatings strategies usually generate interstices between the SnS and carbonaceous material, interrupting electron and ion transfer and unsatisfied accommodation of volume expansion. Herein, point-cavity-like carbon coated SnS nanotubes (CN/SnS) were synthesized by a close-knit mechanism using polyvinylpyrrolidone (PVP) and carbon nitride (g-C₃N₄) as carbon sources. The carbonyl group in PVP can form hexahydroxylated stannyl compound with Sn²⁺, and the amine group can generate C-N bond with the g-C₃N₄ template in an aqueous solution, respectively. The unique construction of CN/SnS can successfully reinforce the electron and ion transfer capability and accommodate volume expansion. The reformative effectivity dramatically improves the energy storage properties of SnS electrode for LIBs/SIBs. The CN/SnS electrode can deliver high specific capacities of 547.7 mAh g^-1 at 1.0 A g^-1 after 300 cycles for lithium-ion batteries and 298.2 mAh g^-1at 0.1 A g^-1 after 200 cycles for sodium-ion batteries, respectively. The structure design is practical and feasible, which could be used to develop high-performance transition metal sulfide/carbon composite anodes for LIBs and SIBs.

论文题目：Point-cavity-like carbon layer coated SnS nanotubes with improved energy storage capacity for lithium/sodium ion batteries.

论文作者：Hong Yin,Luo Jia, Huaiyu Li,An Liu, Gangyong Li,Yucan Zhu,Junlin Huang, Minglei Cao, Zhaohui Hou.