A promising composite solid electrolyte incorporating LLZO into PEO/PVDF matrix for all-solid-state lithium-ion batteries

Progress in thermal stability of all‐solid‐state‐Li‐ion‐batteries

“…The PEO/PVDF electrolyte layer with LLZO added showed better flame‐retardant performance than the Celgard separator (Figure 4(B)). 57 Owing to the excellent thermal safety of PVDF‐HFP, the PVDF‐HFP/PFPEs/20 wt% LGPS showed good fire‐resistance in the flammability test (Figure 4(C)). 50 Tang et al 58 found that PEO‐based CPE modified with vermiculite sheets maintained its original shape after combustion in the lighter burning experiment, while the material without vermiculite sheets shrank a lot in the same test (Figure 4(D)).…”

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.…”

“…Polymer blending technology is a promising method to regulate the crystallinity of single polymer [154,155] . Recently, incorporating LLZO-based ceramics into the mixed polymer matrixes to construct SCEs with superior large Li + transference number, high ionic conductivity, suppression of lithium dendrite growth and the improvement of battery performances has received some attention [143][144][145] . For example, He et al, prepared a flexible LLZO-based SCE by using the homogenously dispersed nano-sized LLZO, PEC, P(VdF-HFP) and LiFSI as raw materials and solution-casting method [143] .…”

“…The assembled LiFePO 4 |0LLZO-30PEC-5P(VdF-HFP) −60LiFSI|Li battery displays a discharge specific capacity of 121.4 mAh g −1 (at 1 C) and excellent capacity retention of 96.5% after 100 cycles at 1 C under 55 °C. Li et al optimized the composition of (PEO/PVDF) matrix and introduced Li 6.2 Ga 0.1 La 3 Zr 1.5 Bi 0.5 O 12 (LLZO) ceramic powders into the host to fabricate SCEs [144] . It is found that the PEO/PVDF blend matrix with a weight ratio of 7:3 displays a low melting point and crystallinity as well as high thermo stability.…”

Mechanical Integrity Degradation and Control of All-Solid-State Lithium Battery with Physical Aging Poly (Vinyl Alcohol)-Based Electrolyte

“…In contrast to inorganic counterparts with a brittle crystalline phase, the solid polymer electrolyte (SPE) exhibits excellent interfacial compatibility, and superior elasticity to endure greater mechanical deformation, contributing to be cast into the complicated architectures for lithium-ion and lithium-metal batteries [ 3 , 4 , 5 ]. Consequently, a wide array of polymers such as poly (ethylene oxide) (PEO) [ 6 , 7 , 8 , 9 ], polyacrylonitrile (PAN) [ 10 , 11 , 12 , 13 ], poly (vinylidene fluoride) (PVdF) [ 14 , 15 ], and its copolymer with hexafluoropropylene (PVdF-HFP) [ 16 , 17 ], poly (methyl methacrylate) (PMMA) [ 18 , 19 , 20 ], and poly (vinyl alcohol) (PVA) [ 21 , 22 , 23 , 24 ], as well as their mixtures [ 25 , 26 , 27 , 28 ], have been adopted as the potential matrices for solid electrolytes. Especially, the outstanding inherent advantages (nontoxicity, biocompatibility, biodegradable, good mechanical strength, relatively high dielectric constant, and charge storage capacity) of PVA make it one of the preferred choices for such applications [ 29 , 30 , 31 ].…”