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首页> 外文期刊>Advanced Functional Materials >Reversibly Compressible, Highly Elastic, and Durable Graphene Aerogels for Energy Storage Devices under Limiting Conditions
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Reversibly Compressible, Highly Elastic, and Durable Graphene Aerogels for Energy Storage Devices under Limiting Conditions

机译：极限条件下用于储能装置的可逆压缩，高弹性和耐用的石墨烯气凝胶

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摘要

High porosity combined with mechanical durability in conductive materials is in high demand for special applications in energy storage under limiting conditions, and it is fundamentally important for establishing a relationship between the structure/chemistry of these materials and their properties. Herein, polymer-assisted self-assembly and cross-linking are combined for reduced graphene oxide (rGO)-based aerogels with reversible compressibility, high elasticity, and extreme durability. The strong interplay of cross-linked rGO (x-rGO) aerogels results in high porosity and low density due to the re-stacking inhibition and steric hinderance of the polymer chains, yet it makes mechanical durability and structural bicontinuity possible even under compressive strains because of the coupling of directional x-rGO networks with polymer viscoelasticity. The x-rGO aerogels retain ＞140% and ＞1400% increases in the gravimetric and volumetric capacitances, respectively, at 90% compressive strain, showing reversible change and stability of the volumetric capacitance under both static and dynamic compressions; this makes them applicable to energy storage devices whose volume and mass must be limited.
机译：导电材料中的高孔隙率与机械耐久性相结合，对于在限定条件下的能量存储中的特殊应用提出了很高的要求，并且对于在这些材料的结构/化学性质及其性能之间建立关系至关重要。本文中，将聚合物辅助的自组装和交联结合在一起，可还原的氧化石墨烯（rGO）基气凝胶具有可逆的可压缩性，高弹性和极高的耐用性。交联的rGO（x-rGO）气凝胶之间的相互作用很强，由于聚合物链的重新堆积抑制和位阻，导致高孔隙率和低密度，但即使在压缩应变下，其机械耐久性和结构双连续性也是可能的，因为定向x-rGO网络与聚合物粘弹性的耦合在90％的压缩应变下，x-rGO气凝胶的重量和体积电容分别保持＞ 140％和＞ 1400％的增加，在静态和动态压缩下均表现出可逆的变化和体积电容的稳定性。这使得它们适用于必须限制体积和质量的储能设备。

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  • 来源
    《Advanced Functional Materials》 |2015年第7期|1053-1062|共10页
  • 作者

    Jin-Yong Hong; Bo Mee Bak; Jeong Jae Wie; Jing Kong; Ho Seok Park;

  • 作者单位

    School of Chemical Engineering Sungkyunkwan University (SKKU) Suwon 440-746, Korea,Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge, MA 02139, USA;

    School of Chemical Engineering Sungkyunkwan University (SKKU) Suwon 440-746, Korea;

    Department of Chemical and Biomolecular Engineering University of Delaware 150 Academy Street, Newark, DE 19716, USA;

    Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge, MA 02139, USA;

    School of Chemical Engineering Sungkyunkwan University (SKKU) Suwon 440-746, Korea;

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