Solid polymer electrolyte supported by porous polymer membrane for all-solid-state lithium batteries

A Critical Review for an Accurate Electrochemical Stability Window Measurement of Solid Polymer and Composite Electrolytes

“…Since then, PEO-based electrolytes have undergone a lot of development and several studies based on PEO and PEO derivatives have been conducted [ 13 , 14 , 15 , 16 ]. Throughout the years, research on non-polyether-based SPEs (alone or mixed/grafted with PEO) and composite electrolytes have been performed [ 16 , 17 , 18 , 19 ] to overcome limitations in the ionic conductivity and electrochemical stability of PEO. SCEs are generally prepared by the dispersion of inorganic fillers in the polymer matrix to enhance the mechanical properties, the interfacial stability/compatibility, and the ionic conductivity (by decreasing the crystallinity of the polymer host) of the solid composite electrolyte.…”

One-Pot Synthesis of Polyester-Based Linear and Graft Copolymers for Solid Polymer Electrolytes

“…When the lithium salt concentration is 35 wt%, the melting peak gradually disappears, indicating that the solid polymer electrolyte becomes completely amorphous above 35 wt%, which is consistent with the reported work. 38 The disappearance of crystallinity is attributed to the physical cross-linking between molecules caused by the interaction of ions and polymers at high salt concentration, which is helpful for the improvement of electrochemical performance of SPEs. 79 In addition, with the increase of the lithium salt concentration, the glass transition temperature (T g ) is also continuously decreasing, reaching the lowest value of -49.62 °C in the case of 35 wt% of lithium salt.…”

“…A solid polymer electrolyte with a high electrochemical stability window (ESW) will better meet the application of high-voltage all-solid-state LIBs. 38,40 Therefore, the ESW of representative PESPE 80-17 is investigated by the assembly of Li/PESPE/SS batteries to run linear sweep voltammetry (LSV) at 60 o C (Figure 8a). The oxidation decomposition voltage of PESPE 80-17 is 5.1 V vs Li + /Li, and the peaks at about 1-2 V are likely ascribed to the decomposition of some SPE components as well as to the reduction of some impurities from the one-pot synthesis.…”

“…[25][26][27][28] Polyester with a low glass transition temperature (T g ) and melting temperature is a kind of polymers with good biocompatibility and easy degradability, [29][30][31][32] which is widely used in biomedicine and self-assembly fields. [33][34][35][36] When applied to the field of SPEs, the polyester-based electrolyte possesses a wider electrochemically stable window and higher lithium-ion transference number, [37][38][39][40][41][42] which is a very promising material and is expected to replace PEO-based SPEs. It noted to be pointed out that polyester has a similar thermal property and semi-crystallinity to PEO.…”

Solid Polymer Electrolytes with Flexible Framework of SiO2 Nanofibers for Highly Safe Solid Lithium Batteries

“…However, EVs suffer mileage and safety issues due to the capacity limits and security threats of liquid-electrolyte-based lithium-ion batteries (LIBs) [4][5][6][7][8][9][10]. Solid lithium batteries (SLBs) show great potential in breaking through the safety and capacity limitations of traditional LIBs [11][12][13][14][15] as they enable the use of high-voltage cathodes and Li metal anodes with the help of solid-state electrolytes (SSEs) [16]. Among numerous kinds of SSEs, polyethylene oxide (PEO)-based electrolytes have received extensive attention owing to their usable lithium-ion conductivities at elevated temperatures and acceptable stability against lithium anodes [17][18][19][20][21][22][23].…”