Journal article
A novel de-coupling solid polymer electrolyte via semi-interpenetrating network for lithium metal battery
ENERGY STORAGE MATERIALS, v 29
01 Aug 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Compared with linear homopolymer and block copolymer electrolytes, network-based solid polymer electrolytes (SPEs) demonstrated much improved lithium dendrite resistance and cell cyclability in lithium metal batteries (LMBs), suggesting that polymer chain architecture plays a pivotal role in SPE design. To further improve the state-of-the-art performance of SPEs, in this work, we report a novel interpenetrating network (IPN) SPE that is comprised of poly (ethylene oxide) and poly (propylene carbonate) (PPC) chains. The synthesis of the SPE is based on the crosslinking of octakis(3-glycidyloxypropyldimethylsiloxy)octasilsesquioxane and amine-terminated polyethylene glycol while incorporating linear PPC with a controlled concentration. The IPN SPEs showed improved ionic conductivity and a nearly threefold increase of lithium ion transference number. The optimized SPE could be stably cycled for over 300 h at a harsh current density of 1.5 mA cm(-2) in the galvanostatic symmetrical cell plating/stripping experiment. Scanning electron microscopy (SEM) revealed that incorporation of PPC could effectively reduce the uneven lithium deposition while X-ray photoelectron spectroscopy (XPS) was used to confirm the active components that are associated with the stable solid electrolyte interface. Full LMBs fabricated using the IPN SPE, a lithium metal anode and a LiFePO4 cathode delivered high specific capacity of over 160 mAh g(-1) at 0.1 C and over 95 mAh g(-1) at 2 degrees C with an excellent Coulombic efficiency and lifetime. This work demonstrated a new pathway of SPE molecular design towards high performance SPEs for LMB applications.
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Details
- Title
- A novel de-coupling solid polymer electrolyte via semi-interpenetrating network for lithium metal battery
- Creators
- Yongwei Zheng - Drexel UniversityXiaowei Li - Drexel UniversityChristopher Y. Li - Drexel University
- Publication Details
- ENERGY STORAGE MATERIALS, v 29
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- CBET 1510092; CBET 1603520 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000571725100004
- Scopus ID
- 2-s2.0-85083321461
- Other Identifier
- 991019167689904721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology