Nitrogen-doped carbon (NC) decorated Cu₂NiSnS₄ (CNTS) microflower composites (NC@CNTS) were fabricated through a facile solvothermal and pyrrole polymerization with further annealing treatment. The NC@CNTS composites possessed a three-dimension (3D) microflower-like hierarchical structure. The unique microflower structure of NC@CNTS composites exhibited remarkable electrochemical performance as electrode materials for long life lithium ion batteries. The as-prepared composites had a stable and reversible capacity that reached 943 mA h g⁻¹ after 160 cycles at a current rate of 0.1 A g⁻¹. It showed satisfactory cycle stability and rate capability even at 2 A g⁻¹, and specific capacity stabilized at 288 mA g⁻¹ after 1000 cycles. The present facile and cost-effective strategy can be applied for the synthesis of other transition metal sulfide nanomaterials for energy storage and conversion applications.

通过简单的溶剂热和吡咯聚合并进一步退火处理，制备了氮掺杂的碳（NC）修饰的Cu ₂ NiSnS ₄（CNTS）微花复合材料（NC @ CNTS）。NC @ CNTS复合材料具有三维（3D）微花状分层结构。NC @ CNTS复合材料独特的微花结构具有出色的电化学性能，可作为长寿命锂离子电池的电极材料。所制备的复合材料具有稳定的和可逆的容量达到943毫安ħ克^-1在0.1 A g的电流速率160次循环后^-1。即使在2 A g ^-1时，也显示出令人满意的循环稳定性和倍率能力，比电容稳定在288 mA g1000次循环后为^-1。本实用新型和具有成本效益的策略可以用于合成其他过渡金属硫化物纳米材料，用于能量存储和转化应用。