Sandwich-Like Poly(propylene carbonate)-Based Electrolyte for Ambient-Temperature Solid-State Lithium Ion Batteries

Abstract

A poly(propylene carbonate) (PPC)-based sandwichlike composite solid polymer electrolyte (SE) was designed and applied to solid-state lithium ion batteries at 25 °C. The sandwichlike structure of the composite SE was composed of three parts. A polypropylene separator was used as a support membrane to enhance the strength of the SE membrane. Succinonitrile in the PPC-based SE was used to increase the ionic conductivity. Pure PPC as a buffer layer was closed to the lithium anode, which could improve the interface compatibility, Coulombic efficiency, and cycle life of batteries. The sandwich-like composite SE exhibited good comprehensive properties such as a high ion transference number (0.65), sufficient ionic conductivity (2.18 × 10 −4 S cm −1 and 5.77 × 10 −4 S cm −1 at 25 and 55 °C, respectively), and outstanding electrochemical stability at ambient temperature. Furthermore, a Li/LiFePO 4 cell with the sandwich-like composite SE delivered a discharge capacity close to 140 mA h g −1 (0.1 C) at 25 °C. The results suggested that a sandwich-like PPC-based electrolyte is a promising SE for solid-state batteries.

The Effect of Different Mixed Organic Solvents on the Properties of p(OPal-MMA) Gel Electrolyte Membrane for Lithium Ion Batteries

“…In order to explore the practical application performance of GPEs in LIBs, the galvanostatic charge and discharge tests of Li/GPEs/LiFePO4 cells were investigated and the initial profiles at 0.1 C rate were shown in Figure 6a. A typical charge-discharge potential plateau of LiFePO4 appeared clearly at around 3.4~3.5 V, which was consistent with its typical electrochemical behavior previously reported [39][40][41], indicated a reversible cycling process. Remarkably, the GPE prepared from S2-4 membrane delivered an initial charge capacity of 167 mAh/g ( Figure 7a); it was close to the theoretical specific capacity (170 mAh/g).…”

CO2-fixation into cyclic and polymeric carbonates: principles and applications

“…399 Next to the extensive research towards poly(ethylene carbonate)-based electrolytes, poly( propylene carbonate) has also been investigated as potential solid polymer electrolyte in energy storage devices. 400 Various blends with different ratios of poly( propylene carbonate), poly(ethylene oxide) and a LiClO 4 salt produced polymeric electrolytes that showed enhanced ionic conductivity compared to conventional pure poly(ethylene oxide). 401 The highest measured ionic conductivity was in the order of 10 −5 S cm −1 at room temperature for an electrolyte incorporating a 1 : 1 mass ratio of poly( propylene carbonate) : poly(ethylene oxide) mixed with 10 wt% LiClO 4 .…”

Gel hybrid copolymer of organic palygorskite and methyl methacrylate electrolyte coated onto Celgard 2325 applied in lithium ion batteries

“…The electrolyte‐soaked separator was sandwiched between two lithium foils in a coin type cell 2032. The lithium‐ion transference number ( t Li + ) was determined by the direct current polarization method . The t Li+ was calculated by the following eq.…”