TY - JOUR
T1 - Enabling High-Performance NASICON-Based Solid-State Lithium Metal Batteries Towards Practical Conditions
AU - Paolella, Andrea
AU - Liu, Xiang
AU - Daali, Amine
AU - Xu, Wenqian
AU - Hwang, Inhui
AU - Savoie, Sylvio
AU - Girard, Gabriel
AU - Nita, Alina Gheorghe
AU - Perea, Alexis
AU - Demers, Hendrix
AU - Zhu, Wen
AU - Guerfi, Abdelbast
AU - Vijh, Ashok
AU - Bertoni, Giovanni
AU - Gazzadi, Gian Carlo
AU - Berti, Giulia
AU - Sun, Chengjun
AU - Ren, Yang
AU - Zaghib, Karim
AU - Armand, Michel
AU - Kim, Chisu
AU - Xu, Gui-Liang
AU - Amine, Khalil
PY - 2021/7/23
Y1 - 2021/7/23
N2 - Solid-state lithium metal batteries (SSLMBs) are promising next-generation high-energy rechargeable batteries. However, the practical energy densities of the reported SSLMBs have been significantly overstated due to the use of thick solid-state electrolytes, thick lithium (Li) anodes, and thin cathodes. Here, a high-performance NASICON-based SSLMB using a thin (60 µm) Li1.5Al0.5Ge1.5(PO4)3 (LAGP) electrolyte, ultrathin (36 µm) Li metal, and high-loading (8 mg cm−2) LiFePO4 (LFP) cathode is reported. The thin and dense LAGP electrolyte prepared by hot-pressing exhibits a high Li ionic conductivity of 1 × 10−3 S cm−1 at 80 °C. The assembled SSLMB can thus deliver an increased areal capacity of ≈1 mAh cm−2 at C/5 with a high capacity retention of ≈96% after 50 cycles under 80 °C. Furthermore, it is revealed by synchrotron X-ray absorption spectroscopy and in situ high-energy X-ray diffraction that the side reactions between LAGP electrolyte and LFP cathode are significantly suppressed, while rational surface protection is required for Ni-rich layered cathodes. This study provides valuable insights and guidelines for the development of high-energy SSLMBs towards practical conditions.
AB - Solid-state lithium metal batteries (SSLMBs) are promising next-generation high-energy rechargeable batteries. However, the practical energy densities of the reported SSLMBs have been significantly overstated due to the use of thick solid-state electrolytes, thick lithium (Li) anodes, and thin cathodes. Here, a high-performance NASICON-based SSLMB using a thin (60 µm) Li1.5Al0.5Ge1.5(PO4)3 (LAGP) electrolyte, ultrathin (36 µm) Li metal, and high-loading (8 mg cm−2) LiFePO4 (LFP) cathode is reported. The thin and dense LAGP electrolyte prepared by hot-pressing exhibits a high Li ionic conductivity of 1 × 10−3 S cm−1 at 80 °C. The assembled SSLMB can thus deliver an increased areal capacity of ≈1 mAh cm−2 at C/5 with a high capacity retention of ≈96% after 50 cycles under 80 °C. Furthermore, it is revealed by synchrotron X-ray absorption spectroscopy and in situ high-energy X-ray diffraction that the side reactions between LAGP electrolyte and LFP cathode are significantly suppressed, while rational surface protection is required for Ni-rich layered cathodes. This study provides valuable insights and guidelines for the development of high-energy SSLMBs towards practical conditions.
KW - hot pressing
KW - lithium metal batteries
KW - NASICON
KW - practical conditions
KW - thick cathodes
KW - thin Li metal
KW - thin solid-state electrolytes
UR - http://www.scopus.com/inward/record.url?scp=85106015110&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85106015110&origin=recordpage
U2 - 10.1002/adfm.202102765
DO - 10.1002/adfm.202102765
M3 - RGC 21 - Publication in refereed journal
SN - 1616-301X
VL - 31
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 30
M1 - 2102765
ER -
