4.8 Article

An advanced solid polymer electrolyte composed of poly(propylene carbonate) and mesoporous silica nanoparticles for use in all-solid-state lithium-ion batteries

期刊

ENERGY STORAGE MATERIALS
卷 37, 期 -, 页码 476-490

出版社

ELSEVIER
DOI: 10.1016/j.ensm.2021.02.034

关键词

Composite solid polymer electrolyte; Poly(propylene) carbonate; Mesoporous silica nanoparticles; High Li ion transference number; All solid-state lithium-ion battery

资金

  1. National Research Foundation of Korea (NRF) - MSIT, Korea [2018R1A5A1025224, 2019R1A2C1084020]
  2. Korea Institute of Energy Technology Evaluation and Planning (KETEP) - MOTIE, Korea [20172420108730]
  3. Korea Evaluation Institute of Industrial Technology (KEIT) [20172420108730] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  4. National Research Foundation of Korea [2019R1A2C1084020] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

CSPEs are potential materials to replace hazardous organic liquid electrolytes in LIBs, as they are easy to process and allow better interfacial contact. However, their poor mechanical strength, low ionic conductivity, and limited cycling stability hinder their practical applications. By utilizing PPC as the host matrix and highly mesoporous silica nanoparticles (MSNs) as the filler, a cost-effective, flexible, and stable CSPE was developed with enhanced physico-electrochemical properties. The interaction of Li+ with PPC and MSNs contributes to the excellent performance of the CSPE, opening up new possibilities for solid-state battery fabrication and engineering.
Composite solid polymer electrolytes (CSPEs) are promising candidates for replacing potentially hazardous organic liquid electrolytes used in Li ion batteries (LIBs). CSPEs are easy to process, have the ability to form films, and make better interfacial contact. However, their poor mechanical strength, low ionic conductivity, and long cycling stability limit their practical applications. Here, we demonstrate the fabrication of a cost-effective, flexible, self-standing, and highly stable CSPE using poly(propylene carbonate) (PPC) as the host matrix and highly mesoporous silica nanoparticles (MSNs) as the filler. The fabricated CSPE had a high ionic conductivity of approximately 8.5 x 10(-4) S cm(-1) at 60 degrees C, electrochemical potential stability up to approximately 4.8 V vs. Li/Li+, an ultra-high lithium transference number of approximately 0.86, impressive stability over 1000 h of Li stripping/plating, and an excellent electrode compatibility. With cyclability over 200 cycles and a negligible overpotential, the Li/CSPE/LFP cell delivered a reversible capacity of 171 and 103 mAh g(-1) at 0.1 C and 1 C, respectively, with a good rate capability up to 5 C. The interaction of Li+ with PPC and the MSNs is demonstrated by solid-state magic angle spinning nuclear magnetic resonance (MAS-NMR) and X-ray photoelectron spectroscopy (XPS) studies. The enhanced physico-electrochemical properties of the CSPE were attributed to the large MSNs-related surface area, which enables firm interaction with the PPC matrix and provides a less-tortuous polymer-ceramic phase for fast lithium ion transportation. The proposed MSNs-reinforced CSPE thus opens new possibilities for the fabrication and engineering of solid-state batteries.

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