A composite solid electrolyte with a framework of vertically aligned perovskite for all-solid-state Li-metal batteries

Ke Liu; Maochun Wu; Lei Wei; Yanke Lin; Tianshou Zhao

doi:10.1016/j.memsci.2020.118265

A composite solid electrolyte with a framework of vertically aligned perovskite for all-solid-state Li-metal batteries

Ke Liu, Maochun Wu, Lei Wei, Yanke Lin, Tianshou Zhao

Research output: Journal article publication › Journal article › Academic research › peer-review

52 Citations (Scopus)

Abstract

Composite solid electrolytes (CSEs), which inherit the flexibility of polymer electrolytes and the high ionic conductivity of ceramic electrolytes, hold a great potential to realize all-solid-state Li-metal batteries (ASSLMBs) with high energy density and enhanced safety. However, conventional preparation methods for CSEs by randomly dispersing ceramic particles in a polymer matrix fail to provide effective Li⁺ conducting networks, thus severely sacrificing the high ionic conductivity of ceramic fillers. In this work, we develop a framework of vertically aligned perovskite Li_0.33La_0.557TiO₃ (LLTO) embedded in a PEO-LiTFSI matrix to maximize the ionic conduction. The vertically aligned LLTO structure prepared by an ice-templating method provides fast, continuous and the shortest pathways for Li⁺ transport, thus boosting the ionic conductivity from 0.038 to 0.13 mS cm⁻¹. As a result, a Li|LiFePO₄ full battery assembled with the developed CSE is capable of delivering a specific discharge capacity of 144.6 mAh g⁻¹ at 1 C at 60 °C with a high capacity retention of 96.0% after 100 cycles.

Original language	English
Article number	118265
Journal	Journal of Membrane Science
Volume	610
DOIs	https://doi.org/10.1016/j.memsci.2020.118265
Publication status	Published - 1 Sept 2020
Externally published	Yes

Keywords

Aligned
All-solid-state
Lithium metal
Perovskite
Solid electrolyte

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/j.memsci.2020.118265

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title = "A composite solid electrolyte with a framework of vertically aligned perovskite for all-solid-state Li-metal batteries",

abstract = "Composite solid electrolytes (CSEs), which inherit the flexibility of polymer electrolytes and the high ionic conductivity of ceramic electrolytes, hold a great potential to realize all-solid-state Li-metal batteries (ASSLMBs) with high energy density and enhanced safety. However, conventional preparation methods for CSEs by randomly dispersing ceramic particles in a polymer matrix fail to provide effective Li+ conducting networks, thus severely sacrificing the high ionic conductivity of ceramic fillers. In this work, we develop a framework of vertically aligned perovskite Li0.33La0.557TiO3 (LLTO) embedded in a PEO-LiTFSI matrix to maximize the ionic conduction. The vertically aligned LLTO structure prepared by an ice-templating method provides fast, continuous and the shortest pathways for Li+ transport, thus boosting the ionic conductivity from 0.038 to 0.13 mS cm−1. As a result, a Li|LiFePO4 full battery assembled with the developed CSE is capable of delivering a specific discharge capacity of 144.6 mAh g−1 at 1 C at 60 °C with a high capacity retention of 96.0% after 100 cycles.",

keywords = "Aligned, All-solid-state, Lithium metal, Perovskite, Solid electrolyte",

author = "Ke Liu and Maochun Wu and Lei Wei and Yanke Lin and Tianshou Zhao",

note = "Funding Information: The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. T23-601/17-R). Funding Information: The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. T23-601/17-R ). Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

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doi = "10.1016/j.memsci.2020.118265",

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AU - Liu, Ke

AU - Wu, Maochun

AU - Wei, Lei

AU - Lin, Yanke

AU - Zhao, Tianshou

N1 - Funding Information: The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. T23-601/17-R). Funding Information: The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. T23-601/17-R ). Publisher Copyright: © 2020 Elsevier B.V.

PY - 2020/9/1

Y1 - 2020/9/1

N2 - Composite solid electrolytes (CSEs), which inherit the flexibility of polymer electrolytes and the high ionic conductivity of ceramic electrolytes, hold a great potential to realize all-solid-state Li-metal batteries (ASSLMBs) with high energy density and enhanced safety. However, conventional preparation methods for CSEs by randomly dispersing ceramic particles in a polymer matrix fail to provide effective Li+ conducting networks, thus severely sacrificing the high ionic conductivity of ceramic fillers. In this work, we develop a framework of vertically aligned perovskite Li0.33La0.557TiO3 (LLTO) embedded in a PEO-LiTFSI matrix to maximize the ionic conduction. The vertically aligned LLTO structure prepared by an ice-templating method provides fast, continuous and the shortest pathways for Li+ transport, thus boosting the ionic conductivity from 0.038 to 0.13 mS cm−1. As a result, a Li|LiFePO4 full battery assembled with the developed CSE is capable of delivering a specific discharge capacity of 144.6 mAh g−1 at 1 C at 60 °C with a high capacity retention of 96.0% after 100 cycles.

AB - Composite solid electrolytes (CSEs), which inherit the flexibility of polymer electrolytes and the high ionic conductivity of ceramic electrolytes, hold a great potential to realize all-solid-state Li-metal batteries (ASSLMBs) with high energy density and enhanced safety. However, conventional preparation methods for CSEs by randomly dispersing ceramic particles in a polymer matrix fail to provide effective Li+ conducting networks, thus severely sacrificing the high ionic conductivity of ceramic fillers. In this work, we develop a framework of vertically aligned perovskite Li0.33La0.557TiO3 (LLTO) embedded in a PEO-LiTFSI matrix to maximize the ionic conduction. The vertically aligned LLTO structure prepared by an ice-templating method provides fast, continuous and the shortest pathways for Li+ transport, thus boosting the ionic conductivity from 0.038 to 0.13 mS cm−1. As a result, a Li|LiFePO4 full battery assembled with the developed CSE is capable of delivering a specific discharge capacity of 144.6 mAh g−1 at 1 C at 60 °C with a high capacity retention of 96.0% after 100 cycles.

KW - Aligned

KW - All-solid-state

KW - Lithium metal

KW - Perovskite

KW - Solid electrolyte

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A composite solid electrolyte with a framework of vertically aligned perovskite for all-solid-state Li-metal batteries

Abstract

Keywords

ASJC Scopus subject areas

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