Strongly Anchoring Polysulfides by Hierarchical Fe3O4/C3N4 Nanostructures for Advanced Lithium-Sulfur Batteries  

作　　者：Soochan Kim Simindokht Shirvani‑Arani Sungsik Choi Misuk Cho Youngkwan Lee 

机构地区：[1]School of Chemical Engineering,Sungkyunkwan University,Suwon 16419,Republic of Korea [2]Nuclear Science and Technology Research Institute(NSTRI),Tehran 14395‑834,Iran

出　　处：《Nano-Micro Letters》2020年第10期236-246,共11页纳微快报（英文版）

基　　金：supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(NRF-2019R1A2C1003594 and NRF-2019R1A2C1003551)。

摘　　要：Li-S batteries have attracted considerable interest as nextgeneration energy storage devices owing to high energy density and the natural abundance of sulfur.However,the practical applications of Li-S batteries are hampered by the shuttle effect of soluble lithium polysulfides(LPS),which results in low cycle stability.Herein,a functional interlayer has been developed to efficiently regulate the LPS and enhance the sulfur utilization using hierarchical nanostructure of C3 N4(t-C3 N4)embedded with Fe304 nanospheres.t-C3 N4 exhibits high surface area and strong anchoring of LPS,and the Fe3 O4/t-C3 N4 accelerates the anchoring of LPS and improves the electronic pathways.The combination of these materials leads to remarkable battery performance with 400%improvement in a specific capacity and a low capacity decay per cycle of 0.02%at 2 C over 1000 cycles,and stable cycling at 6.4 mg cm-2 for high-sulfur-loading cathode.

关 键 词：Hierarchical nanostructured C3N4 Fe3O4 nanosphere INTERLAYER Long-term cycling Lithium-sulfur battery 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]