Flower-like SnS nanostructures are obtained by a simple solvothermal method for anode applications in Na-ion batteries. We show experimental evidence of progressive Sn agglomeration and crystalline Na₂S enrichment at the end of de-sodiation process of the SnS electrode, both of which contribute to the capacity decay of the electrode upon repeated cycles. By replacing the commonly adopted acetylene black conductive additive with multi-wall carbon nanotubes (MWCNT), the cycle stability of the SnS electrode is largely improved, which correlates well with the observed suppression of both Sn agglomeration and Na₂S enrichment at the end of de-sodiation cycle. A full cell is assembled with the SnS/MWCNT anode and the P2-Na_2/3Ni_1/3Mn_1/2Ti_1/6O₂ cathode. An initial energy density of 262 Wh/kg (normalized to the total mass of cathode and anode) is demonstrated for the full cell, which retains 71% of the first discharge capacity after 40 cycles.

花状SnS纳米结构是通过简单的溶剂热方法获得的，用于Na离子电池的阳极应用。我们显示了在SnS电极的脱盐过程结束时进行性Sn团聚和结晶Na ₂ S富集的实验证据，这两个因素都导致电极在重复循环后的容量衰减。通过用多壁碳纳米管（MWCNT）代替常用的乙炔黑导电添加剂，大大提高了SnS电极的循环稳定性，这与观察到的对Sn团聚和Na ₂ S富集结束时的抑制作用很好相关。脱泥周期。将满电池与SnS / MWCNT阳极和P2-Na _2/3 Ni _1/3 Mn组装在一起_1/2 Ti _1/6 O ₂阴极。整个电池的初始能量密度为262 Wh / kg（归一化为阴极和阳极的总质量），在40个循环后仍保持了首次放电容量的71％。