Anisotropic Ion Transport in a Poly(ethylene oxide)鈥揕iClO4 Solid State Electrolyte Templated by Graphene Oxide

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• 作者：Shan Cheng ; Derrick M. Smith ; Christopher Y. Li
• 刊名：Macromolecules
• 出版年：2015
• 出版时间：July 14, 2015
• 年：2015
• 卷：48
• 期：13
• 页码：4503-4510
• 全文大小：494K
• ISSN：1520-5835

文摘

Solid polymer electrolytes (SPEs) have attracted intensive attention due to their potential applications in all-solid-state lithium batteries. Tailoring crystallization is crucial to the design of high performance poly(ethylene oxide) (PEO)鈥揵ased SPEs. In this paper, we demonstrate that PEO crystal orientation in a PEO鈥搇ithium electrolyte results in anisotropic ionic conductivity along and through the crystalline lamellae. This conductivity anisotropy can be further enhanced by incorporating two-dimensional graphene oxide (GO) nanosheets, which retard PEO crystallization, template the crystal orientation, and guide the ion transport, leading to highly anisotropic and conductive nanocomposite polymer electrolytes.