Novel Sn nanoparticles embedded into the pyrolytic biochar from tea-seed shells composite powders labeled as Sn/C are successfully prepared by a simple calcination method, which are evaluated by FE-SEM, XRD, XPS and TG. Those results indicate that the Sn/C-1.5 composite powders with an optimal weight ratio of Na₂SnO₃ to pyrolytic biochar powders approximating to 1.5:1 can exhibit a stable structure and great crystallinity, in which the pyrolytic biochar structure can not only substantially buffer the volume contraction and expansion of Sn nanoparticles, but also provide a high electronic conductivity and inhibit the agglomeration of Sn nanoparticles during cycles. The cell assembled with Sn/C-1.5 can deliver a higher initial discharge specific capacity of 872.6 mAh g⁻¹ with a coulombic efficiency of 76.5% and retain 373.5 mAh g⁻¹ after 100 cycles at 100 mA g⁻¹. Those enhanced electrochemical performance as well as excellent environmental friendliness of the as-prepared Sn/C-1.5 composite powders contributes them to be potential anode materials for lithium ions batteries.

通过简单的煅烧方法成功地从标记为 Sn/C 的茶籽壳复合粉末中嵌入热解生物炭中的新型 Sn 纳米粒子，并通过 FE-SEM、XRD、XPS 和 TG 对其进行评估。这些结果表明，当 Na ₂ SnO ₃与热解生物炭粉末的最佳重量比接近 1.5:1 时，Sn/C-1.5 复合粉末可以表现出稳定的结构和良好的结晶度，其中热解生物炭结构不仅可以缓冲 Sn 纳米粒子的体积收缩和膨胀，但也提供高电子导电性并抑制循环过程中 Sn 纳米粒子的团聚。用Sn/C-1.5组装的电池可以提供更高的初始放电比容量872.6 mAh g ^-1用的76.5％一库仑效率和保留373.5毫安克^-1在100mA克100次循环后^-1。所制备的 Sn/C-1.5 复合粉末增强的电化学性能以及优异的环境友好性使其成为潜在的锂离子电池负极材料。