In:
Materials Advances, Royal Society of Chemistry (RSC), Vol. 4, No. 16 ( 2023), p. 3452-3460
Abstract:
With high ionic conductivity and good contact/adhesion with electrodes, quasi-solid polymer electrolytes (QPEs) are considered as one of the most promising options to address the safety concerns of next-generation rechargeable batteries. A trade-off exists between mechanical strength and ionic conductivity, e.g ., a high electrolyte uptake ratio leads to high ionic conductivity while low mechanical strength, and vice versa . Constructing QPEs with integrated high ionic conductivity and mechanical robustness is crucial in promoting the practical use of safe and long-cycling lithium (Li)-metal batteries (LMBs). Herein, by integrating the poly(propylene) fiber (PPF) and a rationally designed polymer network, i.e. , poly[poly(ethylene glycol) methyl ether methacrylate)- r -(2-ethylhexyl acrylate)- r -sodium ( p -styrene sulfonate)- r -polyethylene glycol dimethacrylate] (PPES), a mechanically reinforced PPES@PPF film is obtained with a decent Young's modulus of ∼190 MPa. This fiber reinforced QPE (rQPE) exhibits a high ionic conductivity of 1.1 mS cm −1 at 60 °C. The resulting Li/rQPE/LiFePO 4 (LFP) cell shows excellent cycling stability with a capacity retention of 91% over 900 cycles. Moreover, a cell with ultra-thin QPE (tQPE, ∼10 µm) and a high-voltage LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) cathode was also assembled, and delivers stable cycling performance over 300 cycles with a capacity retention of 80%. The current design of fiber-reinforced QPE not only surpasses the mechanical strength–ionic conductivity trade-off of QPEs, but also sheds light on the application of solid electrolytes for high-energy density LMBs.
Type of Medium:
Online Resource
ISSN:
2633-5409
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
3031236-X
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