Effect of Polymer Architecture on the Ionic Conductivity. Densely Grafted Poly(ethylene oxide) Brushes Doped with LiTf

Zardalidis, George; Pipertzis, Achilleas; Mountrichas, Grigoris; Pispas, Stergios; Mezger, Markus; Floudas, George

doi:10.1021/acs.macromol.6b00290

Cited by 46 publications

(46 citation statements)

References 45 publications

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“…In a pioneering work, Phan et al suggested single-ion BAB triblock copolymers to be highly efficient lithium-metal electrolytes [259]. Following the same approach, densely grafted PEO brushes on a poly(hydroxylstyrene backbone and block copolymers with polystyrene were designed as model systems for lithium ion transport [260]. At 333 K, the ionic conductivity was approximately 6 × 10 −5 S cm −1 and the modulus 2 × 10 6 Pa for a composition of [EO]:[Li + ] = 8:1.…”

Section: Polymer Electrolytesmentioning

confidence: 99%

Building Better Batteries in the Solid State: A Review

et al. 2019

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Most of the current commercialized lithium batteries employ liquid electrolytes, despite their vulnerability to battery fire hazards, because they avoid the formation of dendrites on the anode side, which is commonly encountered in solid-state batteries. In a review two years ago, we focused on the challenges and issues facing lithium metal for solid-state rechargeable batteries, pointed to the progress made in addressing this drawback, and concluded that a situation could be envisioned where solid-state batteries would again win over liquid batteries for different applications in the near future. However, an additional drawback of solid-state batteries is the lower ionic conductivity of the electrolyte. Therefore, extensive research efforts have been invested in the last few years to overcome this problem, the reward of which has been significant progress. It is the purpose of this review to report these recent works and the state of the art on solid electrolytes. In addition to solid electrolytes stricto sensu, there are other electrolytes that are mainly solids, but with some added liquid. In some cases, the amount of liquid added is only on the microliter scale; the addition of liquid is aimed at only improving the contact between a solid-state electrolyte and an electrode, for instance. In some other cases, the amount of liquid is larger, as in the case of gel polymers. It is also an acceptable solution if the amount of liquid is small enough to maintain the safety of the cell; such cases are also considered in this review. Different chemistries are examined, including not only Li-air, Li–O2, and Li–S, but also sodium-ion batteries, which are also subject to intensive research. The challenges toward commercialization are also considered.

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Section: Polymer Electrolytesmentioning

confidence: 99%

Building Better Batteries in the Solid State: A Review

et al. 2019

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“…For example, the macromolecular design of a poly(hydroxylstyrene) (PHOS) backbone connected with dense PEO brushes not only improved the mechanical stability with a modulus at 2 × 10 6 Pa, but also suppressed the crystallization of the PEO chains, offering similar or optimized ionic conductivities compared to that of LiCF 3 SO 3 (LiTf)‐doped linear PEO, as shown in Figure a. [ 100 ] Moreover, higher thermal stability could be achieved by substituting PHOS with a stiffer polynorbornene backbone and combining it with PEO side chains into the brush block structure, which improve their applicability for high‐temperature LIBs. An additional has demonstrated that after adding LiTFSI as dopant, this brush BCP could self‐assemble into a more ordered lamellar structure, creating a flatter interface between the two blocks.…”

Section: Well‐defined Polymer Matricesmentioning

confidence: 99%

Section: Well‐defined Polymer Matricesmentioning

confidence: 99%

Structure Code for Advanced Polymer Electrolyte in Lithium‐Ion Batteries

Wang

Zhen

et al. 2020

Adv Funct Materials

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Over the past decade, lithium‐ion batteries (LIBs) have been widely applied in consumer electronics and electric vehicles. Polymer electrolytes (PEs) play an essential role in LIBs and have attracted great interest for the development of next‐generation rechargeable batteries with high energy density. Due to the several practical applications of LIBs and high demands for LIBs performance, many state‐of‐the‐art PEs with different structures and functionalities have been developed to regulate the LIBs performance, especially their rate capability, cycling durability, and lifespan. In this review, the recent advances in high‐performance LIBs prepared using well‐defined PEs are summarized. The ion‐transport mechanisms and preparation techniques of various well‐defined PE classes compared to conventional PEs are also discussed. The aim is to elucidate the structure code for advanced PEs with optimized properties, including ionic conductivity, mechanical properties, processability, accessibility, etc. The existing challenges and future perspectives are also discussed, setting the basis for designing novel PEs for energy conversion applications.

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“…In the foregoing examples, only short side chains are grafted. Zardalidis et al studied the physicochemical and electrochemical properties of poly(hydroxylstyrene) with long side PEO chains [71]. The copolymer exhibits a similar electrochemical behavior as the linear PEO because of the crystallization of PEO chains but a better mechanical strength.…”

Section: Comb-like Polymermentioning

confidence: 99%

Comprehensive Review of Polymer Architecture for All-Solid-State Lithium Rechargeable Batteries

2020

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Solid-state batteries are an emerging option for next-generation traction batteries because they are safe and have a high energy density. Accordingly, in polymer research, one of the main goals is to achieve solid polymer electrolytes (SPEs) that could be facilely fabricated into any preferred size of thin films with high ionic conductivity as well as favorable mechanical properties. In particular, in the past two decades, many polymer materials of various structures have been applied to improve the performance of SPEs. In this review, the influences of polymer architecture on the physical and electrochemical properties of an SPE in lithium solid polymer batteries are systematically summarized. The discussion mainly focuses on four principal categories: linear, comb-like, hyper-branched, and crosslinked polymers, which have been widely reported in recent investigations as capable of optimizing the balance between mechanical resistance, ionic conductivity, and electrochemical stability. This paper presents new insights into the design and exploration of novel high-performance SPEs for lithium solid polymer batteries.

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Effect of Polymer Architecture on the Ionic Conductivity. Densely Grafted Poly(ethylene oxide) Brushes Doped with LiTf

Cited by 46 publications

References 45 publications

Building Better Batteries in the Solid State: A Review

Building Better Batteries in the Solid State: A Review

Structure Code for Advanced Polymer Electrolyte in Lithium‐Ion Batteries

Comprehensive Review of Polymer Architecture for All-Solid-State Lithium Rechargeable Batteries

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