Toward high performance solid‐state lithium‐ion battery with a promising PEO/PPC blend solid polymer electrolyte. (16th July 2020)

• Record Type: Journal Article
• Authors: Zhu, Lin; Li, Jialun; Jia, Yufei; Zhu, Penghui; Jing, Maoxiang; Yao, Shanshan; Shen, Xiangqian; Li, Songjun; Tu, Feiyue
• Is Part Of: International journal of energy research. Volume 44:Number 13(2020)
• Page Start: 10168
• Page End: 10178
• Publication Date: 2020-07-16
• Subjects: poly(ethylene oxide) -- poly(propylene carbonate) -- polymer blend -- solid electrolytes -- solid‐state lithium‐ion batteries; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.5632
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: A promising solid polymer blend electrolyte is prepared by blending of poly(ethylene oxide) (PEO) with different content of amorphous poly(propylene carbonate) (PPC), in which the amorphous property of PPC is utilized to enhance the amorphous/free phase of solid polymer electrolyte, so as to achieve the purpose of modifying PEO‐based solid polymer electrolyte. It indicates that the blending of PEO with PPC can effectively reduce the crystallization and increase the ion conductivity and electrochemical stability window of solid polymer electrolyte. When the content of PPC reaches 50%, the ionic conductivity reaches the maximum, which is 2.04 × 10 −5 S cm −1 and 2.82 × 10 −4 S cm −1 at 25°C and 60°C, respectively. The electrochemical stability window increases from 4.25 to 4.9 V and the interfacial stability of lithium metal anode is also greatly improved. The solid‐state LiFePO4 //Li battery with the PEO/50%PPC blend solid polymer electrolyte has good cycling stability, which the maximum discharge specific capacity is up to 125 mAh g −1 at a charge/discharge current density of 0.5 C at 60°C. Abstract : Neat PEO‐based SPE vs PEO/PPC BSPE.