Two-Dimensional CeO2/RGO Composite-Modified Separator for Lithium/Sulfur Batteries

Suyu Wang; Fan Gao; Yan Zhao; Ning Liu; Taizhe Tan; Xin Wang

doi:10.1186/s11671-018-2798-5

Two-Dimensional CeO₂/RGO Composite-Modified Separator for Lithium/Sulfur Batteries

Nanoscale Res Lett. 2018 Nov 23;13(1):377. doi: 10.1186/s11671-018-2798-5.

Authors

Suyu Wang¹, Fan Gao¹, Yan Zhao², Ning Liu³, Taizhe Tan⁴, Xin Wang⁵

Affiliations

¹ School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China.
² School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China. yanzhao1984@hebut.edu.cn.
³ School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China. ningliu1985@hebut.edu.cn.
⁴ Synergy Innovation Institute of GDUT, Heyuan, 517000, China.
⁵ International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangzhou, Guangdong Province, China. wangxin@scnu.edu.cn.

Abstract

In this work, a modified separator coated with a functional layer of reduced graphene oxide (RGO) anchored by cerium oxide (CeO₂) nanoparticles was developed. The superior conductivity of RGO and chemical immobilization of high-ordered sulfur-related species (mainly Li₂S_n 4 ≤ n ≤ 8) of CeO₂ yielded batteries with enhanced characteristics. A remarkable original capacity of 1136 mAh g^-1 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 CeO₂/RGO composite is promising to suppress the shuttling of polysulfides for better utilization of the active material.

Keywords: CeO2/RGO composite; Lithium/sulfur batteries; Modified separator.

Abstract

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