Open Access
Open access
Science advances, volume 3, issue 4

Toward garnet electrolyte–based Li metal batteries: An ultrathin, highly effective, artificial solid-state electrolyte/metallic Li interface

Kun (kelvin) Fu 1, 2
Yunhui Gong 1, 2
Boyang Liu 1
Yizhou Zhu 1
Shaomao Xu 1, 2
Yonggang Yao 1
Wei Luo 1
Chengwei Wang 1, 2
Steven D Lacey 1
Jiaqi Dai 1
Yanan Chen 1
Yifei Mo 1, 2
Eric Wachsman 1, 2
Liangbing Hu 1, 2
Publication typeJournal Article
Publication date2017-04-07
Journal: Science advances
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor13.6
ISSN23752548
Multidisciplinary
Abstract
Strategy to change the wettability of the solid-state electrolyte against Li and reduce interface resistance. Solid-state batteries are a promising option toward high energy and power densities due to the use of lithium (Li) metal as an anode. Among all solid electrolyte materials ranging from sulfides to oxides and oxynitrides, cubic garnet–type Li7La3Zr2O12 (LLZO) ceramic electrolytes are superior candidates because of their high ionic conductivity (10−3 to 10−4 S/cm) and good stability against Li metal. However, garnet solid electrolytes generally have poor contact with Li metal, which causes high resistance and uneven current distribution at the interface. To address this challenge, we demonstrate a strategy to engineer the garnet solid electrolyte and the Li metal interface by forming an intermediary Li-metal alloy, which changes the wettability of the garnet surface (lithiophobic to lithiophilic) and reduces the interface resistance by more than an order of magnitude: 950 ohm·cm2 for the pristine garnet/Li and 75 ohm·cm2 for the surface-engineered garnet/Li. Li7La2.75Ca0.25Zr1.75Nb0.25O12 (LLCZN) was selected as the solid-state electrolyte (SSE) in this work because of its low sintering temperature, stabilized cubic garnet phase, and high ionic conductivity. This low area-specific resistance enables a solid-state garnet SSE/Li metal configuration and promotes the development of a hybrid electrolyte system. The hybrid system uses the improved solid-state garnet SSE Li metal anode and a thin liquid electrolyte cathode interfacial layer. This work provides new ways to address the garnet SSE wetting issue against Li and get more stable cell performances based on the hybrid electrolyte system for Li-ion, Li-sulfur, and Li-oxygen batteries toward the next generation of Li metal batteries.

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GOST Copy
Fu K. (. et al. Toward garnet electrolyte–based Li metal batteries: An ultrathin, highly effective, artificial solid-state electrolyte/metallic Li interface // Science advances. 2017. Vol. 3. No. 4.
GOST all authors (up to 50) Copy
Fu K. (., Gong Y., Liu B., Zhu Y., Xu S., Yao Y., Luo W., Wang C., Lacey S. D., Dai J., Chen Y., Mo Y., Wachsman E., Hu L. Toward garnet electrolyte–based Li metal batteries: An ultrathin, highly effective, artificial solid-state electrolyte/metallic Li interface // Science advances. 2017. Vol. 3. No. 4.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1126/sciadv.1601659
UR - https://doi.org/10.1126/sciadv.1601659
TI - Toward garnet electrolyte–based Li metal batteries: An ultrathin, highly effective, artificial solid-state electrolyte/metallic Li interface
T2 - Science advances
AU - Fu, Kun (kelvin)
AU - Gong, Yunhui
AU - Liu, Boyang
AU - Zhu, Yizhou
AU - Xu, Shaomao
AU - Yao, Yonggang
AU - Luo, Wei
AU - Wang, Chengwei
AU - Lacey, Steven D
AU - Dai, Jiaqi
AU - Chen, Yanan
AU - Mo, Yifei
AU - Wachsman, Eric
AU - Hu, Liangbing
PY - 2017
DA - 2017/04/07 00:00:00
PB - American Association for the Advancement of Science (AAAS)
IS - 4
VL - 3
PMID - 28435874
SN - 2375-2548
ER -
BibTex
Cite this
BibTex Copy
@article{2017_Fu,
author = {Kun (kelvin) Fu and Yunhui Gong and Boyang Liu and Yizhou Zhu and Shaomao Xu and Yonggang Yao and Wei Luo and Chengwei Wang and Steven D Lacey and Jiaqi Dai and Yanan Chen and Yifei Mo and Eric Wachsman and Liangbing Hu},
title = {Toward garnet electrolyte–based Li metal batteries: An ultrathin, highly effective, artificial solid-state electrolyte/metallic Li interface},
journal = {Science advances},
year = {2017},
volume = {3},
publisher = {American Association for the Advancement of Science (AAAS)},
month = {apr},
url = {https://doi.org/10.1126/sciadv.1601659},
number = {4},
doi = {10.1126/sciadv.1601659}
}
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