Poly(ethylene oxide)-based composite solid polymer electrolyte containing Li7La3Zr2O12 and poly(ethylene glycol) dimethyl ether

Status and prospect of garnet/polymer solid composite electrolytes for all-solid-state lithium batteries

“…Meanwhile, PEO shows high viscosity, poor filmforming ability as well as narrow electrochemical window, which further hinder the LLZO-based/PEO SCEs for large scale application in real batteries. To explore LLZO-based/polymer SCEs with better properties, other novel types of polymers, such as poly(propylene carbonate) (PPC) [125][126][127][128] , poly(vinylidene fluoride) (PVDF) [129][130][131][132] , poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) [133][134][135][136][137] , poly(ethylene carbonate) (PEC) [138] , polyacrylonitrile (PAN) [139] , poly(methyl methacrylate) (PMMA) [140] , cross-linked polyethyleneglycol [141] , poly(ethylene glycol) diacrylate (PEGDA) [142] and mixed polymers [143][144][145] have been developed as the substrate for constructing novel LLZObased/polymer SCEs. Table 4 summarizes the intrinsic properties of the typical LLZO-based/novel polymer SCEs and the electrochemical performances of ASSLBs assembled by these novel SCEs.…”

“…In this cell, the graphite-functionalized layer can improve the compatibility between lithium anode and electrolyte, while the SCE layer on the NCM622 cathode can enhance the ionic conductivity and interfacial contact between cathode and electrolyte. With https://engine.scichina.com/doi/10.1016/j.jechem.2020.03.017 [145] this battery configuration, the NCM622|LLZTO/PPC|Li battery can exhibit good comprehensive electrochemical performances, with an initial discharge capacities of 162.0 and 130.1 mAh g −1 at 1 and 3 C, respectively, and capacity retention of 77.3% after 150 cycles at 3 C under room temperature, although the used LLZTO/PPC SCE shows moderate ionic conductivity of 1.57 × 10 −4 S cm −1 . Similar to the concept of the asymmetric structure design of electrolytes, Sun's groupreported a rigid-flexible asymmetric solid electrolyte (ASE) that was successfully used in building ASSLBs [146] .…”

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

“…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]. However, they also have shortcomings, such as an oxidization potential smaller than 4.0 V and low mechanical strength [24].…”

“…It has been demonstrated that the dispersion of ceramic nanoparticles or nanofibers, such as SiO 2 , Al 2 O 3 , Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO), or Li 1.5 Al 0.5 Ge 1.5 (PO4) 3 (LAGP), into the polymer matrices can increase the ionic conductivities, broaden the electrochemical windows, and improve the mechanical strengths of PEO-based solid polymer electrolytes (SPEs) [24][25][26][27][28]. In addition, it has also been shown that the interaction between PEO and fillers are dependent not only on different filler materials but also the morphology and size of fillers.…”

Application of polyamide 6 microfiber non-woven fabrics in the large-scale production of all-solid-state lithium metal batteries

“…Nonetheless, because PEO is a semi-crystalline substance, the ionic conductivity of this type of polymer electrolyte at room temperature is poor, making it difficult to meet the requirements of high-performance all-solid-state batteries [ 20 ]. Inorganic/polymer SCE as an organic and inorganic composite electrolyte can combine the high ionic conductivity of inorganic solid electrolyte and the excellent interface compatibility of SPE [ 21 ]. However, the presence of inorganic ceramics in the two-phase composite SCE may cause lithium ions to be deposited directly inside the electrolyte, which ultimately leads to battery short-circuiting [ 22 ].…”