DataVXAdvanced SciencePaper
journal article·2022-12Open access

Elucidating the Synergic Effect in Nanoscale MoS2/TiO2 Heterointerface for Na‐Ion Storage

Chunrong Ma, Dewen Hou, Jiali Jiang, Yanchen Fan, Xiang Li, Tianyi Li, Zifeng Ma, Haoxi Ben, Hui Xiong

Advanced Science· Volume 9· Issue 35
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Abstract

Abstract Interface engineering in electrode materials is an attractive strategy for enhancing charge storage, enabling fast kinetics, and improving cycling stability for energy storage systems. Nevertheless, the performance improvement is usually ambiguously ascribed to the “synergetic effect”, the fundamental understanding toward the effect of the interface at molecular level in composite materials remains elusive. In this work, a well‐defined nanoscale MoS2/TiO2 interface is rationally designed by immobilizing TiO2 nanocrystals on MoS2 nanosheets. The role of heterostructure interface between TiO2 and MoS2 by operando synchrotron X‐ray diffraction (sXRD), solid‐state nuclear magnetic resonance, and density functional theory calculations is investigated. It is found that the existence of a hetero‐interfacial electric field can promote charge transfer kinetics. Based on operando sXRD, it is revealed that the heterostructure follows a solid‐solution reaction mechanism with small volume changes during cycling. As such, the electrode demonstrates ultrafast Na+ ions storage of 300 mAh g−1 at 10 A g−1 and excellent reversible capacity of 540 mAh g−1 at 0.2 A g−1. This work provides significant insights into understanding of heterostructure interface at molecular level, which suggests new strategies for creating unconventional nanocomposite electrode materials for energy storage systems.
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Research context

NanomaterialsComposites

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Technologies Research · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Bio‐Fibers and Eco‐Textiles Qingdao University Qingdao Shandong 266071 China

Micron School of Materials Science and Engineering Boise State University Boise ID 83725 USA

Center for Nanoscale Materials Argonne National Laboratory Lemont IL 60439 USA

Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao Shandong 266237 China

SUSTech Academy for Advanced Interdisciplinary Studies and Department of Materials Science & Engineering Southern University of Science and Technology Shenzhen Guangdong Province 518055 China

Chemical Sciences and Engineering Division Argonne National Laboratory Lemont Illinois 60439 USA

X‐Ray Science Division Argonne National Laboratory Lemont IL 60439 USA

Shanghai Electrochemical Energy Devices Research Centre School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Center for Advanced Energy Studies Idaho Falls 83401 USA

Funding

National Natural Science Foundation of China · Qingdao University · U.S. Department of Energy · Office of Science · Argonne National Laboratory · Basic Energy Sciences · State Key Laboratory of Bio-Fibers and Eco-Textiles · Taishan Scholar Foundation of Shandong Province

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