Six-arm star polymer based on discotic liquid crystal as high performance all-solid-state polymer electrolyte for lithium-ion batteries

Wang, Shi; Wang, Ailian; Yang, Chengkai; Gao, Rui; Liu, Xu; Chen, Jie; Wang, Zhinan; Zeng, Qinghui; Liu, Xiangfeng; Zhou, Henghui; Zhang, Liaoyun

doi:10.1016/j.jpowsour.2018.05.069

Cited by 52 publications

(42 citation statements)

References 52 publications

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“…Wang et al were the first to propose a hyper-branched star liquid crystal polymer as an all-solid-state polymer electrolyte for LIBs [279]. To combine the advantages of liquid crystals and star polymers, Wang et al synthesized a hyper-branched star liquid crystal polymer as an all-solid-state polymer electrolyte for lithium-ion batteries [280]. Triphenylene (a discotic liquid crystal) was selected as the core of a six-arm star polymer that was synthesized via sequential atomic transfer radical polymerization of styrene and poly(ethylene glycol) methyl ether-methacrylate (PEGMA).…”

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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“…The PE film not only showed excellent electrochemically performance, but also a long‐range molecular orientation after annealing, which is the typical feature of liquid crystals. [ 126 ] Afterward, the same research group developed a hyperbranched star liquid crystal polymer (HSLCP) electrolyte using hyperbranched poly(glycidol) (HPG) as the core and poly‐ε‐caprolactone (PCL)‐ b ‐poly (4‐cyanobiphenyl methylmethacrylate) [(LC)x] as block arms ( Figure a). HSLCP exhibited improved thermal stability (368 °C) and outstanding

t_{{Li}^{+}}

(0.63) compared to the previous six‐arm star copolymer.…”

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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“…Beside the molecular structure of polymer matrices, the topological structure with intramolecular reaction is also crucial for the performance of SPE. [ 56–59 ] The rigid segments could rearrange and entangle in the separated domain to form strong intermolecular crosslinks, enhancing the mechanical properties of the SPE. Yang Chen et al., synthesized a hyperstar polymer with hyperbranched PEO as star core and linear PS as arms.…”

Section: Macromolecular Design Of Polymer Matrixmentioning

confidence: 99%

Macromolecular Design of Lithium Conductive Polymer as Electrolyte for Solid‐State Lithium Batteries

Meng

Lian

Cui

2020

Small

100

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In the development of solid‐state lithium batteries, solid polymer electrolyte (SPE) has drawn extensive concerns for its thermal and chemical stability, low density, and good processability. Especially SPE efficiently suppresses the formation of lithium dendrite and promotes battery safety. However, most of SPE is derived from the matrix with simple functional group, which suffers from low ionic conductivity, reduced mechanical properties after conductivity modification, bad electrochemical stability, and low lithium‐ion transference number. Appling macromolecular design with multiple functional groups to polymer matrix is accepted as a strategy to solve the problems of SPE fundamentally. In this review, macromolecular design based on lithium conducting groups is summarized including copolymerization, network construction, and grafting. Meanwhile, the construction of single‐ion conductor polymer is also focused herein. Moreover, synergistic effects between the designed matrix, lithium salt, and fillers are reviewed with the objective to further improve the performance of SPE. At last, future studies on macromolecular design are proposed in the development of SPE for solid‐state batteries with high energy density and durability.

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Six-arm star polymer based on discotic liquid crystal as high performance all-solid-state polymer electrolyte for lithium-ion batteries

Cited by 52 publications

References 52 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

Macromolecular Design of Lithium Conductive Polymer as Electrolyte for Solid‐State Lithium Batteries

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