A Dual-Crosslinking Design for Resilient Lithium-Ion Conductors.

Autor: Lopez J; Department of Chemical Engineering, Stanford University, CA, 94305, USA., Sun Y; Department of Materials Science and Engineering, Stanford University, CA, 94305, USA., Mackanic DG; Department of Chemical Engineering, Stanford University, CA, 94305, USA., Lee M; Department of Chemical Engineering, Stanford University, CA, 94305, USA., Foudeh AM; Department of Chemical Engineering, Stanford University, CA, 94305, USA., Song MS; Department of Materials Science and Engineering, Stanford University, CA, 94305, USA.; Energy Material Lab, Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, 130 Samsung-ro, Yeongtong-gu, Suwong-si, Gyeonggi-do, 16678, Republic of Korea., Cui Y; Department of Materials Science and Engineering, Stanford University, CA, 94305, USA.; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA., Bao Z; Department of Chemical Engineering, Stanford University, CA, 94305, USA.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2018 Oct; Vol. 30 (43), pp. e1804142. Date of Electronic Publication: 2018 Sep 10.
DOI: 10.1002/adma.201804142
Abstrakt: Solid-state electrolyte materials are attractive options for meeting the safety and performance needs of advanced lithium-based rechargeable battery technologies because of their improved mechanical and thermal stability compared to liquid electrolytes. However, there is typically a tradeoff between mechanical and electrochemical performance. Here an elastic Li-ion conductor with dual covalent and dynamic hydrogen bonding crosslinks is described to provide high mechanical resilience without sacrificing the room-temperature ionic conductivity. A solid-state lithium-metal/LiFePO 4 cell with this resilient electrolyte can operate at room temperature with a high cathode capacity of 152 mAh g -1 for 300 cycles and can maintain operation even after being subjected to intense mechanical impact testing. This new dual crosslinking design provides robust mechanical properties while maintaining ionic conductivity similar to state-of-the-art polymer-based electrolytes. This approach opens a route toward stable, high-performance operation of solid-state batteries even under extreme abuse.
(© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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