The SnS₂-based anode materials are attractive for high-energy–density lithium-ion batteries, but greatly limited by their low conductivity, large volume effects and sulfur dissolution. Here, we demonstrate the confined synthesis of ultrasmall SnS₂ nanoparticles parallelly dispersed into Ti₃C₂ interlayer. The physical confinement effects and strong Sn-S-Ti covalent bond enable the SnS₂ nanoparticles firmly anchored on Ti₃C₂ interlayer, which can sustain the structural integrity and refrain sulfur dissolution during de-/lithiation. Meantime, the face-to-face contact between them and the widened interlayer spacing of Ti₃C₂ ensure the rapid ions/electrons transfer, greatly enhancing the reaction kinetics and electrochemical reversibility. As a result, SnS₂-in-Ti₃C₂ hybrids exhibit lithium storage capacities of 1076 and 403 mAh g⁻¹ at 0.1 and 10 A g⁻¹, respectively. A 88.5% capacity retention can be obtained even after 1000 cycles at 2 A g⁻¹. This work has proposed an intriguing strategy to construct high-capacity Sn-based materials for advanced lithium-ion batteries.

SnS ₂基负极材料对于高能量密度锂离子电池很有吸引力，但受到其低电导率、大体积效应和硫溶解的极大限制。在这里，我们展示了平行分散到 Ti ₃ C ₂夹层中的超小 SnS ₂纳米颗粒的受限合成。物理限制效应和强的 Sn-S-Ti 共价键使 SnS ₂纳米颗粒牢固地锚定在 Ti ₃ C ₂夹层上，这可以维持结构完整性并在脱锂/锂化过程中抑制硫溶解。同时，它们之间的面对面接触和Ti ₃ C的层间距变宽₂保证离子/电子的快速转移，大大提高了反应动力学和电化学可逆性。结果，SnS ₂ -in-Ti ₃ C ₂杂化物在0.1和10 A g ^{-1 下}分别表现出1076和403 mAh g ^{-1 的}锂存储容量。即使在 2 A g ^{-1 下}循环 1000 次后仍可获得 88.5% 的容量保持率。这项工作提出了一种有趣的策略来构建用于先进锂离子电池的高容量锡基材料。