Comb-like copolymer-based gel polymer electrolytes for lithium ion conductors

Compliant gel polymer electrolyte based on poly(methyl acrylate-co-acrylonitrile)/poly(vinyl alcohol) for flexible lithium-ion batteries

“…4a presents the DSC curve of the compliant polymer membrane from −80 to 150 • C. Two glass transition temperature (T g ) are observed in the DSC, 18 • C and 100 • C, which are in accordance with the copolymer P(MA-co-AN) and PVA, respectively [25]. The first T g is only 18 • C, much lower than that of PAN (about 90 • C) [26,27], while higher than the PMA (about 10 • C) [28]. The T g and FTIR results confirm that the copolymer is formed by the copolymerization between MA and AN monomers, rather than the co-mixture of PMA and PAN.…”

Ceramic and polymeric solid electrolytes for lithium-ion batteries

“…PVdF has been used with the common lithium-ion battery cathode materials, including LiCoO 2 [186,189], LiMn 2 O 4 [190,191], LiFePO 4 [188] and LiNi 0.8 Co 0.2 O 2 [192], as well as in lithium-air batteries [193]. [196][197][198][200][201][202][203][204][205][206].…”

Study on preparation and properties of gel polymer electrolytes based on comb-like copolymer matrix of poly(ethylene glycol) monomethylether grafted carboxylated butadiene-acrylonitrile rubber

“…As accepted, the ionic conductivity of all the tested samples increase with increasing temperature. The relationship between ionic conductivity and temperature for the three GPE samples is well corresponded to Arrhenius-type relationship over the investigated temperature range, which indicates that the charge carriers are almost decoupled from the segmental motion of polymer chains and coupled with the IL molecules [22]. An apparently higher slope detected from the fitted line of XNBR/100 % LiClO 4 -IL sample means higher activation energy for ionic conductivity of this GPE system, and suggests that this polymer matrix presents more hindrance to the Li + transport than the other two.…”

“…The cross-linked main chains in comb-like structure provide rigid backbone and endow gel system with high thermal stability and mechanical properties, while the free branched chains, usually oligomeric poly (ethylene glycol) chains with good segmental motion and Li + affinity, can give rise to high ionic conductivity [19]. Researchers have studied some kinds of comb-like copolymers for GPE [19][20][21][22][23][24][25][26], such as methylmethacrylate-maleic anhydride copolymer with oligo-oxyenthylene side chains [21], copolymer of acrylonitrile and poly (ethylene glycol) methyl ether methacrylate [22], poly(methyl methacrylate) grafted poly(vinylidene fluoride-hexafluoropropylene) [23]. GPE based on copolymer of butadiene-acrylonitrile rubber (NBR) and poly (ethylene glycol) methyl ether methacrylate were also studied [24], as well as the Li + interaction with ether and nitrile groups [22,27].…”

“…Researchers have studied some kinds of comb-like copolymers for GPE [19][20][21][22][23][24][25][26], such as methylmethacrylate-maleic anhydride copolymer with oligo-oxyenthylene side chains [21], copolymer of acrylonitrile and poly (ethylene glycol) methyl ether methacrylate [22], poly(methyl methacrylate) grafted poly(vinylidene fluoride-hexafluoropropylene) [23]. GPE based on copolymer of butadiene-acrylonitrile rubber (NBR) and poly (ethylene glycol) methyl ether methacrylate were also studied [24], as well as the Li + interaction with ether and nitrile groups [22,27]. NBR with low glass transition temperature (T g ), non-crystallinity, good elasticity and convenience for cross-linking can lead to flat, thin and flexible paper-like batteries and be helpful to give tight contact between electrolyte layer and electrode in batteries [24].…”