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Na+ intercalation pseudocapacitance in graphene-coupled titanium oxide enabling ultra-fast sodium storage and long-term cycling

Author

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  • Chaoji Chen

    (State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology)

  • Yanwei Wen

    (State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology)

  • Xianluo Hu

    (State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology)

  • Xiulei Ji

    (Oregon State University)

  • Mengyu Yan

    (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology)

  • Liqiang Mai

    (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology)

  • Pei Hu

    (State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology)

  • Bin Shan

    (State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology)

  • Yunhui Huang

    (State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology)

Abstract

Sodium-ion batteries are emerging as a highly promising technology for large-scale energy storage applications. However, it remains a significant challenge to develop an anode with superior long-term cycling stability and high-rate capability. Here we demonstrate that the Na+ intercalation pseudocapacitance in TiO2/graphene nanocomposites enables high-rate capability and long cycle life in a sodium-ion battery. This hybrid electrode exhibits a specific capacity of above 90 mA h g−1 at 12,000 mA g−1 (∼36 C). The capacity is highly reversible for more than 4,000 cycles, the longest demonstrated cyclability to date. First-principle calculations demonstrate that the intimate integration of graphene with TiO2 reduces the diffusion energy barrier, thus enhancing the Na+ intercalation pseudocapacitive process. The Na-ion intercalation pseudocapacitance enabled by tailor-deigned nanostructures represents a promising strategy for developing electrode materials with high power density and long cycle life.

Suggested Citation

  • Chaoji Chen & Yanwei Wen & Xianluo Hu & Xiulei Ji & Mengyu Yan & Liqiang Mai & Pei Hu & Bin Shan & Yunhui Huang, 2015. "Na+ intercalation pseudocapacitance in graphene-coupled titanium oxide enabling ultra-fast sodium storage and long-term cycling," Nature Communications, Nature, vol. 6(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7929
    DOI: 10.1038/ncomms7929
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    Cited by:

    1. Wu, Xi-Shuo & Dong, Xiao-Ling & Wang, Bo-Yang & Xia, Ji-Li & Li, Wen-Cui, 2022. "Revealing the sodium storage behavior of biomass-derived hard carbon by using pure lignin and cellulose as model precursors," Renewable Energy, Elsevier, vol. 189(C), pages 630-638.
    2. Pandey, Mayank & Deshmukh, Kalim & Raman, Akhila & Asok, Aparna & Appukuttan, Saritha & Suman, G.R., 2024. "Prospects of MXene and graphene for energy storage and conversion," Renewable and Sustainable Energy Reviews, Elsevier, vol. 189(PB).
    3. Siyang Xing & Ningning Liu & Qiang Li & Mingxing Liang & Xinru Liu & Haijiao Xie & Fei Yu & Jie Ma, 2024. "Reactive P and S co-doped porous hollow nanotube arrays for high performance chloride ion storage," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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