Functional polymers for lithium metal batteries

Glyme-based electrolytes: suitable solutions for next-generation lithium batteries

“…Ceramic electrolytes such as garnet-type Li7La3Zr2O12 (LLZO) or NASICON-derived structures, e.g., Li1.5Al0.5Ge1.5(PO4)3 (LAGP), provide fast Li + transport and suitable ionic conductivity at room temperature, despite the cycling behavior may be affected by the high interphase stability due to a poor contact between electrodes and electrolyte in the cell. 36 On the other hand, solid polymer electrolytes benefit from suitable electrode/electrolyte contact and remarkable conductivity which, however, are reached at medium-high operative temperatures. Indeed, PEO-based electrolytes usually require temperatures above 65 °C to allow proper amorphization of the crystalline structure and satisfactory battery performance, 37 which may be improved through the introduction of copolymer blocks such as PS, PEGMA, PEGDMA or PEGA, 36,38 or ceramic fillers such as SiO2, ZrO2 or TiO2 in the PEO matrix.…”

“…36 On the other hand, solid polymer electrolytes benefit from suitable electrode/electrolyte contact and remarkable conductivity which, however, are reached at medium-high operative temperatures. Indeed, PEO-based electrolytes usually require temperatures above 65 °C to allow proper amorphization of the crystalline structure and satisfactory battery performance, 37 which may be improved through the introduction of copolymer blocks such as PS, PEGMA, PEGDMA or PEGA, 36,38 or ceramic fillers such as SiO2, ZrO2 or TiO2 in the PEO matrix. 37,39,40 The substitution of PEO with polycarbonate species was recently considered due to the lower crystallinity and good oxidative stability, even though the low stability towards lithium metal may limit their application.…”

“…37,39,40 The substitution of PEO with polycarbonate species was recently considered due to the lower crystallinity and good oxidative stability, even though the low stability towards lithium metal may limit their application. 36 Furthermore, alternative polymer chemistries can be employed to stabilize the lithium anode and synthetize effective separators in order to enhance the Li + exchange between the electrodes. 41,42 Table 2 Along with the initial conceptualization and pioneering studies of glyme-based electrolytes, Li-metal batteries using the most common intercalation electrodes, such as LiCoO2 and graphite, as well as other insertion cathodes such as LiFePO4, were proposed with promising results, in spite of several issues which were firstly identified.…”

“…37,39,40 The substitution of PEO with polycarbonate species was recently considered due to the lower crystallinity and good oxidative stability, even though their low stability towards lithium metal may limit their application. 36 Furthermore, alternative polymer chemistries can be employed to stabilize the lithium anode and synthesize effective separators in order to enhance the Li + exchange between the electrodes. 41,42…”

Single Lithium Ion Conducting “Binderlyte” for High‐Performing Lithium Metal Batteries

“…[22,23] However, its electrically/ionically insulating nature and the use of the toxic organic solvent, N-methyl-2-pyrrolidone (NMP), for this kind of electrode fabrication suggests an active search of more conductive and environmentally friendly polymeric materials. [24,25] In recent years, several kinds of alternative polymeric materials have been investigated for high-voltage cathodes, [26][27][28][29][30] such as lithium polyacrylate (LiPAA), [29] poly (acrylic acid) (PAA)-based amphiphilic bottlebrush polymers (BBPs), [30] and so on. These intriguing studies clearly highlights the significance of developing new polymeric materials for improving the performance of high-voltage cathodes.…”