TY - JOUR
T1 - Stable Cycling of All-Solid-State Lithium Metal Batteries Enabled by Salt Engineering of PEO-Based Polymer Electrolytes
AU - Liu, Lujuan
AU - Wang, Tong
AU - Sun, Li
AU - Song, Tinglu
AU - Yan, Hao
AU - Li, Chunli
AU - Mu, Daobin
AU - Zheng, Jincheng
AU - Dai, Yang
N1 - Publisher Copyright:
© 2022 The Authors. Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.
PY - 2024/3
Y1 - 2024/3
N2 - Poly (ethylene oxide) (PEO)-based polymer electrolytes show the prospect in all-solid-state lithium metal batteries; however, they present limitations of low room-temperature ionic conductivity, and interfacial incompatibility with high voltage cathodes. Therefore, a salt engineering of 1, 1, 2, 2, 3, 3-hexafluoropropane-1, 3-disulfonimide lithium salt (LiHFDF)/LiTFSI system was developed in PEO-based electrolyte, demonstrating to effectively regulate Li ion transport and improve the interfacial stability under high voltage. We show, by manipulating the interaction between PEO matrix and TFSI−-HFDF−, the optimized solid-state polymer electrolyte achieves maximum Li+ conduction of 1.24 × 10−4 S cm−1 at 40 °C, which is almost 3 times of the baseline. Also, the optimized polymer electrolyte demonstrates outstanding stable cycling in the LiFePO4/Li and LiNi0.8Mn0.1Co0.1O2/Li (3.0–4.4 V, 200 cycles) based all-solid-state lithium batteries at 40 °C.
AB - Poly (ethylene oxide) (PEO)-based polymer electrolytes show the prospect in all-solid-state lithium metal batteries; however, they present limitations of low room-temperature ionic conductivity, and interfacial incompatibility with high voltage cathodes. Therefore, a salt engineering of 1, 1, 2, 2, 3, 3-hexafluoropropane-1, 3-disulfonimide lithium salt (LiHFDF)/LiTFSI system was developed in PEO-based electrolyte, demonstrating to effectively regulate Li ion transport and improve the interfacial stability under high voltage. We show, by manipulating the interaction between PEO matrix and TFSI−-HFDF−, the optimized solid-state polymer electrolyte achieves maximum Li+ conduction of 1.24 × 10−4 S cm−1 at 40 °C, which is almost 3 times of the baseline. Also, the optimized polymer electrolyte demonstrates outstanding stable cycling in the LiFePO4/Li and LiNi0.8Mn0.1Co0.1O2/Li (3.0–4.4 V, 200 cycles) based all-solid-state lithium batteries at 40 °C.
KW - all-solid-state battery
KW - high voltage
KW - li-ion conductivity
KW - molecular interaction
KW - poly(ethylene oxide)
UR - http://www.scopus.com/inward/record.url?scp=85147448076&partnerID=8YFLogxK
U2 - 10.1002/eem2.12580
DO - 10.1002/eem2.12580
M3 - Article
AN - SCOPUS:85147448076
SN - 2575-0348
VL - 7
JO - Energy and Environmental Materials
JF - Energy and Environmental Materials
IS - 2
M1 - e12580
ER -
