Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea; Department of Industrial Chemistry, Alagappa University, Karaikudi, 630003, India.
Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea.
J Colloid Interface Sci. 2019 Jan 15;534:47-54. doi: 10.1016/j.jcis.2018.09.004. Epub 2018 Sep 5.
An innovative and simple synthesis strategy of silicon nanoparticle (Si NP) core covered by mesoporous shell carbon (MSC) structure is demonstrated. The Si core@MSC (SCMSC) composite is developed for addressing the issues for Si anode material in lithium ion batteries (LIBs) such as high volume expansion and low electrical conductivity. Significant improvement in the electrochemical performance for the SCMSC anode is observed compared with bare Si anode. The SCMSC composite delivers an initial specific capacity of 2450 mAh g at 0.166 A g with Coulombic efficiency of 99.2% for 100 cycles. Compared to bare Si anode, the SCMSC anode exhibits much higher Li storage capacity, superior cyclability, and good rate capability, highlighting the advantages of hierarchical MSC in the SCMSC structure.
本文展示了一种创新性且简单的硅纳米颗粒（Si NP）核表面覆盖介孔壳碳（MSC）结构的合成策略。Si 核@MSC（SCMSC）复合材料被开发出来，以解决锂离子电池（LIBs）中 Si 阳极材料的问题，如高体积膨胀和低电导率。与纯 Si 阳极相比，SCMSC 阳极在电化学性能方面有显著的提升。SCMSC 复合材料在 0.166 A/g 的电流密度下，首次比容量达到 2450 mAh/g，100 次循环后库仑效率为 99.2%。与纯 Si 阳极相比，SCMSC 阳极具有更高的储锂容量、更好的循环稳定性和良好的倍率性能，突出了 SCMSC 结构中分层 MSC 的优势。
