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Nano Research 2017, 10(9): 3092-3102 https://doi.org/10.1007/s12274-017-1526-2
Research Article | Issue | Published: 19 May 2017

Nanocomposite quasi-solid-state electrolyte for high-safety lithium batteries

Show Author's Information Hyunji Choi1,§,  Hyun Woo Kim1,§,  Jae-Kwang Kim2( ),  Young Jun Lim1,  Youngsik Kim1( ),  Jou-Hyeon Ahn3( )
School of Energy & Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan689-798Republic of Korea
Department of Solar & Energy EngineeringCheongju University, CheongjuChungbuk28503Republic of Korea
School of Energy & Chemical Engineering and Research Institute for Green Energy Convergence TechnologyGyeongsang National University, 900, Gajwa-dongJinju660-701Republic of Korea

§ Hyunji Choi and Hyun Woo Kim contributed equally to this work.

Keywords:
safety, lithium battery, nanocomposition, solidified ionic liquid shell, charge space
An erratum to this article is available online at https://doi.org/10.1007/s12274-017-1784-z
Cite this article:
Choi H, Kim HW, Kim J-K, et al. Nanocomposite quasi-solid-state electrolyte for high-safety lithium batteries. Nano Research, 2017, 10(9): 3092-3102. https://doi.org/10.1007/s12274-017-1526-2
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Abstract Full text Electronic supplementary material About this article

Rechargeable lithium batteries are attractive power sources for electronic devices and are being aggressively developed for vehicular use. Nevertheless, problems with their safety and reliability must be solved for the large-scale use of lithium batteries in transportation and grid-storage applications. In this study, a unique hybrid solid-state electrolyte composed of an ionic liquid electrolyte (LiTFSI/Pyr14TFSI) and BaTiO3 nanosize ceramic particles was prepared without a polymer. The electrolyte exhibited high thermal stability, a wide electrochemical window, good ionic conductivity of 1.3 × 10-3 S·cm-1 at 30 ℃, and a remarkably high lithium-ion transference number of 0.35. The solid-state LiFePO4 cell exhibited the best electrochemical properties among the reported solid-state batteries, along with a reasonable rate capability. Li/LiCoO2 cells prepared using this nanocomposite solid electrolyte exhibited high performance at both room temperature and a high temperature, confirming their potential as lithium batteries with enhanced safety and a wide range of operating temperatures.


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Electronic supplementary material
About this article

Nanocomposite quasi-solid-state electrolyte for high-safety lithium batteries

Show Author's information Hyunji Choi1,§, Hyun Woo Kim1,§, Jae-Kwang Kim2( ), Young Jun Lim1, Youngsik Kim1( ), Jou-Hyeon Ahn3( )
School of Energy & Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan689-798Republic of Korea
Department of Solar & Energy EngineeringCheongju University, CheongjuChungbuk28503Republic of Korea
School of Energy & Chemical Engineering and Research Institute for Green Energy Convergence TechnologyGyeongsang National University, 900, Gajwa-dongJinju660-701Republic of Korea

§ Hyunji Choi and Hyun Woo Kim contributed equally to this work.

Abstract

Rechargeable lithium batteries are attractive power sources for electronic devices and are being aggressively developed for vehicular use. Nevertheless, problems with their safety and reliability must be solved for the large-scale use of lithium batteries in transportation and grid-storage applications. In this study, a unique hybrid solid-state electrolyte composed of an ionic liquid electrolyte (LiTFSI/Pyr14TFSI) and BaTiO3 nanosize ceramic particles was prepared without a polymer. The electrolyte exhibited high thermal stability, a wide electrochemical window, good ionic conductivity of 1.3 × 10-3 S·cm-1 at 30 ℃, and a remarkably high lithium-ion transference number of 0.35. The solid-state LiFePO4 cell exhibited the best electrochemical properties among the reported solid-state batteries, along with a reasonable rate capability. Li/LiCoO2 cells prepared using this nanocomposite solid electrolyte exhibited high performance at both room temperature and a high temperature, confirming their potential as lithium batteries with enhanced safety and a wide range of operating temperatures.

Keywords: safety, lithium battery, nanocomposition, solidified ionic liquid shell, charge space

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Publication history
Copyright
Acknowledgements

Publication history

Received: 24 November 2016
Revised: 23 January 2017
Accepted: 11 February 2017
Published: 19 May 2017
Issue date: September 2017

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2017

Acknowledgements

Acknowledgements

This work was supported by the 2017 Research Fund (No. 1.170012.01) of UNIST (Ulsan National Institute of Science and Technology) and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (Nos. NRF-2014R1A1A2A16053515 and NRF-2016R1A2A2A07005334).

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