首页|Insights into the kinetics-morphology relationship of 1-,2-,and 3D TiNb2O7 anodes for Li-ion storage

Insights into the kinetics-morphology relationship of 1-,2-,and 3D TiNb2O7 anodes for Li-ion storage

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Understanding the influence of electrode material's morphology on electrochemical behavior is of great significance for the development of rechargeable batteries,however,such studies are often limited by the inability to precisely control the morphology of electrode materials.Herein,nanostructured titanium niobium oxides(TiNb2O7)with three different morphologies(one-dimensional(1D),two-dimensional(2D),and three-dimensional(3D))were synthesized via a facile microwave-assisted solvothermal method.The influence of the morphological dimension of TiNb2O7 as electrode material on the electrochemical performance in Li-ion batteries(LIBs)and the underlying correlation with the electrochemical kinetics were studied in detail.2D TiNb2O7(TNO-2D)shows a superior rate capability and cycling stability,associated with improved kinetics for charge transfer and Li-ion diffusion,compared to the 1D and 3D materials.Operando X-ray diffraction measurements reveal the structural stability and crystallographic evolution of TNO-2D upon lithiation and delithiation and correlate the Li-ion diffusion kinetics with the lattice evolution during battery charge and discharge.Moreover,carbon-coated TNO-2D achieves enhanced rate capability(205 mAh·g-1 at 50 C)and long-term cycling stability(87％after 1000 cycles at 5 C).This work provides insights into the rational morphology design of electrode materials for accelerated charge transfer and enhanced fast-charging capability,pushing forward the development of electrode materials for high-power rechargeable batteries in future energy storage.

morphological dimensionelectrochemical kineticslithium-ion batteriesTiNb2O7structural evolution

Wenlei Xu、Yaolin Xu、Veronika Grzimek、Andrea Martin、Thorsten Schultz、Patricia A.Russo、Yan Lu、Norbert Koch、Nicola Pinna

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Department of Chemistry,IRIS Adlershof and the Center for the Science of Materials Berlin,Humboldt-Universität zu Berlin,Brook-Taylor-Str.2,12489 Berlin,Germany

Department of Electrochemical Energy Storage,Helmholtz-Zentrum Berlin für Materialien und Energie,Hahn-Meitner-Platz 1,14109 Berlin,Germany

Institutfür Physik and IRIS Adlershof,Humboldt-Universität zu Berlin,Brook-Taylor-Str.2,12489 Berlin,Germany

Joint Research Group of Molecular Systems,Helmholtz-Zentrum Berlin für Materialien und Energie,12489 Berlin,Germany

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Open Access funding enabled and organized by Projekt DEAL

2024

10.1007/s12274-023-6201-1

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(4)
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