TY - JOUR
T1 - Minimizing the interfacial resistance for a solid-state lithium battery running at room temperature
AU - Wang, Qianchen
AU - Ding, Xiangyu
AU - Li, Jingbo
AU - Jin, Haibo
AU - Gao, Hongcai
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/11/15
Y1 - 2022/11/15
N2 - A ceramic solid electrolyte of Li1.5Al0.5Ge1.5(PO4)3 (LAGP) with high ionic conductivity (4.28 × 10−4 S cm−1 at 30 °C) and low activation energy (0.25 eV) is prepared by a three-step method, and the interfacial properties of the ceramic solid electrolyte are further modified by an in-situ polymerization strategy with the formation of a gel-polymer electrolyte with the thickness of 8.85 μm on the surface of LAGP. The presence of the gel-polymer electrolyte on the surface of LAGP inhibits the side reactions and the growth of lithium dendrites, as evidenced by the stable cycling of the lithium symmetric cells with the modified LAGP solid electrolyte for 1000 h at 25 °C. In addition, the high ionic conductivity and the stable interface of the modified LAGP solid electrolyte enable the solid-state lithium battery with a LiFePO4 cathode, exhibiting superior electrochemical performances which can run stably at 25 °C with initial discharge specific capacity of 159.8 mAh g−1 at 0.1C.
AB - A ceramic solid electrolyte of Li1.5Al0.5Ge1.5(PO4)3 (LAGP) with high ionic conductivity (4.28 × 10−4 S cm−1 at 30 °C) and low activation energy (0.25 eV) is prepared by a three-step method, and the interfacial properties of the ceramic solid electrolyte are further modified by an in-situ polymerization strategy with the formation of a gel-polymer electrolyte with the thickness of 8.85 μm on the surface of LAGP. The presence of the gel-polymer electrolyte on the surface of LAGP inhibits the side reactions and the growth of lithium dendrites, as evidenced by the stable cycling of the lithium symmetric cells with the modified LAGP solid electrolyte for 1000 h at 25 °C. In addition, the high ionic conductivity and the stable interface of the modified LAGP solid electrolyte enable the solid-state lithium battery with a LiFePO4 cathode, exhibiting superior electrochemical performances which can run stably at 25 °C with initial discharge specific capacity of 159.8 mAh g−1 at 0.1C.
KW - Ceramic solid electrolytes
KW - Gel-polymer electrolytes
KW - In-situ polymerization
KW - Interfacial engineering
KW - Solid-state lithium batteries
UR - http://www.scopus.com/inward/record.url?scp=85132919032&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.137740
DO - 10.1016/j.cej.2022.137740
M3 - Article
AN - SCOPUS:85132919032
SN - 1385-8947
VL - 448
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 137740
ER -