用于锂硫电池的二维CeO/RGO复合改性隔膜
Two-Dimensional CeO/RGO Composite-Modified Separator for Lithium/Sulfur Batteries.
作者信息
Wang Suyu, Gao Fan, Zhao Yan, Liu Ning, Tan Taizhe, Wang Xin
机构信息
School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China.
Synergy Innovation Institute of GDUT, Heyuan, 517000, China.
出版信息
Nanoscale Res Lett. 2018 Nov 23;13(1):377. doi: 10.1186/s11671-018-2798-5.
In this work, a modified separator coated with a functional layer of reduced graphene oxide (RGO) anchored by cerium oxide (CeO) nanoparticles was developed. The superior conductivity of RGO and chemical immobilization of high-ordered sulfur-related species (mainly LiS 4 ≤ n ≤ 8) of CeO yielded batteries with enhanced characteristics. A remarkable original capacity of 1136 mAh g was obtained at 0.1 C with capacity retention ratio of 75.7% after 100 charge/discharge cycles. Overall, these data indicate that the separator with CeO/RGO composite is promising to suppress the shuttling of polysulfides for better utilization of the active material.
在这项工作中，开发了一种涂覆有由氧化铈（CeO）纳米颗粒锚定的还原氧化石墨烯（RGO）功能层的改性隔膜。RGO的优异导电性和CeO对高阶硫相关物种（主要是LiS 4≤n≤8）的化学固定作用，使得电池具有增强的性能。在0.1 C下获得了1136 mAh g的显著初始容量，经过100次充放电循环后容量保持率为75.7%。总体而言，这些数据表明，具有CeO/RGO复合材料的隔膜有望抑制多硫化物的穿梭，从而更好地利用活性材料。
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