DataVXACS Applied Materials & InterfacesPaper
journal article·2024-02-14

Synergistic Effect of Dual Phases to Improve Lithium Storage Properties of Nb2O5

Qing Ji, Weiheng Chen, Xiaoping Chen, Xiaoyan Wang, Qingyu Dong, Shanshan Yin, Yanbin Shen, Peter Müller-Buschbaum, Ya-Jun Cheng, Yonggao Xia

ACS Applied Materials & Interfaces· Volume 16· Issue 6
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Source abstract

Abstract

Niobium pentoxides (Nb 2 O 5 ) present great potential as next-generation anode candidates due to exceptional lithium-ion intercalation kinetics, considerably high capacity, and reasonable redox potential. Although four phases of Nb 2 O 5 including hexagonal, orthorhombic, tetragonal, and monoclinic polymorphs show diverse characteristics in electrochemical performance, stable lifetime, high specific capacity, and fast intercalation properties cannot be delivered simultaneously with a single phase. Herein, this issue is addressed by generating a homogeneous mixture of orthorhombic and monoclinic crystals at the nanoscale. Reversible lithium-ion intercalation/deintercalation of the monoclinic phase is achieved, and exceptional lithium storage sites are created at the interface of the two phases. As a result, electrochemical features of stable lifetime from the orthorhombic phase and high specific performance from the monoclinic phase are harmoniously combined. This dual-phase Nb 2 O 5 /C nanohybrids deliver as high as 380 mA h g –1 (0.01–3.0 V) and 184 mA h g –1 (1.0–3.0 V) after 200 cycles. The essential principle of property enhancement is further confirmed through in situ XRD measurements and DFT calculations. The dual-phase concept can be further applied on electrodes with multiphases to achieve high electrochemical performance.
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Research context

Energy storageNanomaterials

OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies

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

Affiliations

Vehicle Energy and Safety Laboratory, Department of Mechanical Engineering, Ningbo University of Technology, Ningbo 315336, P. R. China

Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Zhenhai District, Ningbo 315201, Zhejiang, People’s Republic of China

Ningbo University of Technology, Ningbo 315336, P. R. China

I-Lab, CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China

TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Str. 1, 85748 Garching, Germany

Heinz Maier-Leibnitz-Zentrum (MLZ), Technical University of Munich, Lichtenbergstr.1, 85748 Garching, Germany

Funding

Natural Science Foundation of Ningbo Municipality · Deutsche Forschungsgemeinschaft · Natural Science Foundation of Liaoning Province · Department of Education of Zhejiang Province · National Natural Science Foundation of China · State Key Laboratory of Automotive Simulation and Control · Natural Science Foundation of Zhejiang Province · Ningbo Major Special Project of the Plan ?Science and technology innovation 2025? · Inter-Governmental S&T Cooperation Project · Germany?s Excellence Strategy · International Research Training Group 2022 Alberta/Technical University of Munich International Graduate School for Environmentally Responsible Functional Hybrid Materials · Scientific Cultivation Project of Ningbo University of Technology

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