Poly(Ether-Ester)-Based Solid Polymer Electrolytes with High Li-Ion Transference Number for High Voltage All-Solid-State Lithium Metal Batteries

Chen, Yang1; Zhang, Yin1; Niu, Jianda1; Xu, Hongli2; Dong, Zhixian1; Xu, Jinbao1; Lei, Caihong1

2023-02-01

10.1021/acsaem.3c00061

ACS Applied Energy Materials   Impact Factor & Quartile

2574-0962

Considering the lower room temperature ionic conductivity, Li-ion transference number, and narrow electro-chemical stability window in all-solid-state polymer electrolytes (ASSPEs)-based lithium metal batteries (LMBs), it is of particular necessity to find plausible strategies to accomplish these issues. In this paper, poly(epsilon-caprolactone-co-1,5-dioxepan-2-one) (PDCL)-based poly(ether-ester) ASSPEs have been successfully fabricated by the random ring-opening polymerization of cyclic CL and DXO. The PDCL-SPE exhibits a high ion conductivity of 3.54 x 10-5 S cm-1 at 30 degrees C with a high Li-ion transference number (0.62) and a superior electrochemical stability (5.1 V). FT-IR spectra confirm the synergistic effect of ether and carbonyl of ester from the main chain of PDCL, which is superior to the dissociation of lithium salts and facilitation the motivation of lithium ions. Furthermore, the assembled LiFePO4/PDCL-SPE/Li batteries displayed low interfacial resistance, Li dendrite suppression, high specific capacity, and excellent cyclic performance (capacity retention of 85% after 200 cycles at 0.1 C). The high-voltage LiNi0.5Co0.2Mn0.3O2/PDCL-SPE/Li batteries also exhibits good cycling performance and durability.

Lithium metal batteries Poly(ether-ester)-based solid polymer electrolyte Li dendrite suppression High-voltage

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English

Others

National Natural Science Foundation of China[52003057] ; Natural Science Foundation of Guangdong Province, China[2022A1515010624]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000934589700001

AMER CHEMICAL SOC

Web of Science

1.Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China
2.Southern Univ Sci & Technol, Sch Innovat & Entrepreneurship, Shenzhen 518055, Peoples R China

Chen, Yang,Zhang, Yin,Niu, Jianda,et al. Poly(Ether-Ester)-Based Solid Polymer Electrolytes with High Li-Ion Transference Number for High Voltage All-Solid-State Lithium Metal Batteries[J]. ACS Applied Energy Materials,2023.

Chen, Yang.,Zhang, Yin.,Niu, Jianda.,Xu, Hongli.,Dong, Zhixian.,...&Lei, Caihong.(2023).Poly(Ether-Ester)-Based Solid Polymer Electrolytes with High Li-Ion Transference Number for High Voltage All-Solid-State Lithium Metal Batteries.ACS Applied Energy Materials.

Chen, Yang,et al."Poly(Ether-Ester)-Based Solid Polymer Electrolytes with High Li-Ion Transference Number for High Voltage All-Solid-State Lithium Metal Batteries".ACS Applied Energy Materials (2023).