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Research Article

A homogenous solid polymer electrolyte prepared by facile spray drying method is used for room-temperature solid lithium metal batteries

Zehao Zhou1,§, Tong Sun3,§, Jin Cui1, Xiu Shen2, Chuan Shi1( ), Shuang Cao3, Jinbao Zhao2( )
College of Physics, Qingdao University, Qingdao 266071, China
Collaborative Innovation Center of Chemistry for Energy Materials, State Key Lab of Physical Chemistry of Solid Surfaces, State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle, Engineering Research Center of Electrochemical Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China

§ Zehao Zhou and Tong Sun contributed equally to this work.

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Graphical Abstract

Herein, we have prepared the solid polymer electrolytes (SPE) with facile spray drying method. The obtained solid electrolytes achieve a homogenous dispersion of Young’s modulus and surface electric field.

Abstract

The aggregation of inorganic particles with high mass ratio will form a heterogeneous electric field in the solid polymer electrolytes (SPEs), which is difficult to be compatible with lithium anode, leading to inadequate ionic conductivity. Herein, a facile spray drying method is adopted to increase the mass ratio of inorganic particles and solve the aggregation problems of fillers simultaneously. The polyvinylidene fluoride (PVDF) with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) covers the surface of each Li6.4La3Zr1.4Ta0.6O12 (LLZTO) granules during the nebulization process, then forming flat solid electrolytes via layer-by-layer deposition. Characterized by the atomic force microscope, the obtained solid electrolytes achieve a homogenous dispersion of Young’s modulus and surface electric field. As a result, the as-prepared SPEs present high tensile strength of 7.1 MPa, high ionic conductivity of 1.86 × 10−4 S·cm−1 at room temperature, and wide electrochemical window up to 5.0 V, demonstrating increased mechanical strength and uniform lithium-ion migration channels for SPEs. Thanks to the as-prepared SPEs, the lithium-symmetrical cells show a highly stable Li plating/stripping cycling for over 1,000 h at 0.1 mA·cm−2. The corresponding Li/LCoO2 batteries also present good rate capability and excellent cyclic performance with capacity retention of 80% after 100 cycles at room temperature.

Keywords

solid polymer electrolytesspray dryinghomogenous dispersionsolid lithium batteriespolyvinylidene fluoride/Li6.4La3Zr1.4Ta0.6O12 (PVDF/LLZTO)surface electric field

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Nano Research
Volume 16 Issue 4,
April 2023
Pages 5080-5086
DOI: 10.1007/s12274-021-3683-6
Cite this article:
Zhou Z, Sun T, Cui J, et al. A homogenous solid polymer electrolyte prepared by facile spray drying method is used for room-temperature solid lithium metal batteries. Nano Research, 2023, 16(4): 5080-5086. https://doi.org/10.1007/s12274-021-3683-6
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Special Issue of Xiamen University Centennial CelebrationAccelerating clean energy innovations via nanotechnology toward achieving circular economy

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Received: 13 April 2021
Revised: 06 June 2021
Accepted: 16 June 2021
Published: 13 July 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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