Graphene Oxide‐Based Solid Electrolytes with 3D Prepercolating Pathways for Efficient Proton Transport,Advanced Functional Materials

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Graphene Oxide‐Based Solid Electrolytes with 3D Prepercolating Pathways for Efficient Proton Transport
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2018-10-11 , DOI: 10.1002/adfm.201804944
Li Cao _{1,

2} , Hong Wu _{1,

2,

3} , Pengfei Yang _{1,

2} , Xueyi He _{1,

2} , Jinzhao Li _{1,

2} , Yan Li _{1,

2} , Mingzhao Xu _{1,

2} , Ming Qiu _{1,

2} , Zhongyi Jiang _{1,

2}

Affiliation

Graphene oxide (GO) with unprecedentedly fast ion transport ability has become emerging building blocks for solid electrolytes. However, the inferior through‐plane transport properties, along with the agglomeration and discontinuity of GO nanosheets in composite electrolytes represent a major obstacle for efficient proton conduction. Herein, a 3D prepercolating sulfonated GO (3D sGO) network is designed by a freeze‐casting method, and further fabricated composite electrolytes by infusing polymer electrolytes into the 3D sGO networks. The sGO laminates are well integrated into percolative nanoarchitectures, which enables the 3D sGO networks a high proton conduction capability (five times higher than Nafion membrane, a state‐of‐art solid electrolyte) and isotropic transport feature. The prepercolating strategy avoids sGO nanosheets agglomeration and provides continuously proton‐conductive pathways that percolate throughout the whole electrolytes. Consequently, the composite electrolytes exhibit a remarkable and simultaneous improvement in both in‐plane and through‐plane proton conductivity, which is unattainable for the existing 2D nanofiller–polymer electrolytes. Particularly, the highest through‐plane proton conductivity reaches 0.29 S cm⁻¹, outperforming the current 2D nanofiller‐based composite electrolytes. This prepercolating strategy may open a new avenue to fully utilizing the inherently rapid conduction of 2D materials for efficient transport of diverse ions/molecules.

中文翻译：

具有3D预渗透途径的基于氧化石墨烯的固体电解质，可有效进行质子传输

具有前所未有的快速离子传输能力的氧化石墨烯（GO）已成为固体电解质的新兴组成部分。然而，复合电解质中GO纳米片的团聚和不连续性以及劣质的贯穿平面传输特性，是有效质子传导的主要障碍。在此，通过冷冻浇铸法设计了3D渗滤磺化GO（3D sGO）网络，并通过将聚合物电解质注入3D sGO网络中进一步制造了复合电解质。sGO层压板很好地集成到了渗透性纳米结构中，这使3D sGO网络具有很高的质子传导能力（比最先进的固体电解质Nafion膜高五倍）和各向同性的传输特性。预渗透策略避免了sGO纳米片的团聚，并提供了贯穿整个电解质的连续质子传导途径。因此，复合电解质在面内和面内质子传导率上均显示出显着的同时改善，这是现有2D纳米填料聚合物电解质无法实现的。特别是，最高的平面质子传导率达到0.29 S cm^-1，优于目前的2D纳米填料复合电解质。这种预渗透策略可以为充分利用2D材料固有的快速传导性来有效地运输各种离子/分子开辟一条新途径。

更新日期：2018-10-11

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