High-Index Faceted Nanocrystals as Highly Efficient Bifunctional Electrocatalysts for High-Performance Lithium-Sulfur Batteries

作     者：Bo Jiang Da Tian Yue Qiu Xueqin Song Yu Zhang Xun Sun Huihuang Huang Chenghao Zhao Zhikun Guo Lishuang Fan Naiqing Zhang Bo Jiang;Da Tian;Yue Qiu;Xueqin Song;Yu Zhang;Xun Sun;Huihuang Huang;Chenghao Zhao;Zhikun Guo;Lishuang Fan;Naiqing Zhang

作者机构：State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China Academy of Fundamental and Interdisciplinary SciencesHarbin Institute of TechnologyHarbin 150001People’s Republic of China School of Energy Science and EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2022年第14卷第2期

页      面：324-338页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：This work was supported by the National Natural Science Foundation of China(No.22078078) the Natural Science Foundation of Heilongjiang Province(No.LH2020B008) the State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(No.2019DX13) 

主　　题：High-index faceted Fe_(2)O_(3)nanocrystals Unsaturated coordinated Lithium-sulfur batteries Electrocatalysis 

摘      要：Precisely regulating of the surface structure of crystalline materials to improve their catalytic activity for lithium polysulfides is urgently needed for high-performance lithium-sulfur(Li-S)***,high-index faceted iron oxide(Fe_(2)O_(3))nanocrystals anchored on reduced graphene oxide are developed as highly efficient bifunctional electrocatalysts,effectively improving the electrochemical performance of Li-S *** theoretical and experimental results all indicate that high-index Fe_(2)O_(3)crystal facets with abundant unsaturated coordinated Fe sites not only have strong adsorption capacity to anchor polysulfides but also have high catalytic activity to facilitate the redox transformation of polysulfides and reduce the decomposition energy barrier of Li_(2)*** Li-S batteries with these bifunctional electrocatalysts exhibit high initial capacity of 1521 mAh g^(-1)at 0.1 C and excellent cycling performance with a low capacity fading of 0.025%per cycle during 1600 cycles at 2 *** with a high sulfur loading of 9.41 mg cm^(-2),a remarkable areal capacity of 7.61 mAh cm^(-2)was maintained after 85 *** work provides a new strategy to improve the catalytic activity of nanocrystals through the crystal facet engineering,deepening the comprehending of facet-dependent activity of catalysts in Li-S chemistry,affording a novel perspective for the design of advanced sulfur electrodes.