Liquid crystalline elastomers/glycerol-based solid polymer electrolytes with shape memory properties for Zn-ion battery applications

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2024-09-07 DOI:10.1016/j.materresbull.2024.113084

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Abstract

A new type of solid polymer electrolytes (SPEs) for zinc-ion batteries was fabricated by combining liquid crystalline elastomer (LCE) with glycerol. LCEs were selected for their flexibility and low transition temperatures. However, these materials exhibit a degree of crystallinity at ambient temperatures, limiting high ionic conductivity. Glycerol was introduced as both an antinucleating agent and plasticiser to reduce crystallinity and increase flexibility of this system. As a result, adding 15 wt% glycerol enhanced the ionic conductivity to 1.87 × 10⁻⁵ S cm⁻¹ while maintaining stable charge-discharge cycles for 200 hrs. Besides, this modification reduced the nematic-isotropic transition temperature and storage modulus from 78 °C to 66 °C and 4.7 MPa to 0.6 MPa, respectively. Furthermore, these materials indicated excellent shape fixity and shape recovery of 98.3 % and 99.6 %. The successful fabrication of this LCE/glycerol system highlights its potential for developing shape memory SPE materials tailored for Zn-ion battery applications.

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具有形状记忆特性的液晶弹性体/甘油基固体聚合物电解质在锰离子电池中的应用

通过将液晶弹性体（LCE）与甘油结合，制造出了一种用于锌离子电池的新型固体聚合物电解质（SPE）。选择 LCE 是因为其柔韧性和低转变温度。然而，这些材料在环境温度下会表现出一定程度的结晶性，从而限制了高离子传导性。甘油既是抗核剂，又是增塑剂，可降低结晶度，增加该系统的柔韧性。结果，添加 15 wt% 的甘油可将离子导电率提高到 1.87 × 10-5 S cm-1，同时在 200 小时的充放电循环中保持稳定。此外，这种改性还将向列-各向同性转变温度和存储模量分别从 78 °C 降至 66 °C 和 4.7 MPa 降至 0.6 MPa。此外，这些材料的形状固定性和形状恢复性极佳，分别达到了 98.3% 和 99.6%。这种 LCE/甘油体系的成功制备凸显了其在开发 Zn 离子电池应用的形状记忆 SPE 材料方面的潜力。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.