Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 1, Pages 1195-1202Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c21804
Keywords
solid-state lithium batteries; poly(ethylene oxide); Li1.3Al0.3Ti1.7(PO4)(3) coating; polyethylene separator; electrolyte/anode interface; composite solid-state electrolytes
Funding
- National Key Technologies RD Program [2019YFE0100200]
- National Natural Science Foundation of China [51802342]
- Beijing Municipal Science and Technology Commission [Z191100004719001]
- Key Program-Automobile Joint Fund of National Natural Science Foundation of China [U1964205]
Ask authors/readers for more resources
PEO-based ceramic-polymer (PCP) composite solid-state electrolyte effectively suppresses lithium dendrite growth, enhances lithium deposition uniformity, and improves cycle stability by forming a mixed ionic/electronic conducting interphase intertwined with a solid electrolyte interface. The proposed PCP membrane shows great potential for practical applications due to its easy fabrication and stable cycling performance in all-solid-state batteries.
Poly(ethylene oxide) (PEO)-based solid-state lithium batteries (SSLBs), accompanied by potential high energy density and reliable safety, have attracted wide attention. However, PEO-based solid-state electrolytes (SSEs) are hard to scale up due to their low oxidation stability, low ionic conductivity at room temperature, and relatively poor mechanical properties. Here, a PEO-based ceramic-polymer (PCP) composite SSE is designed. The porous Li1.3Al0.3Ti1.7(PO4)(3) (LATP)-coated polyethylene (PE) separator is filled with PEO/lithium bis(trifluoromethanesulfonyl)-imide (LiTFSI) solution, which possesses both a robust mechanical property and processable flexibility. The results show the PCP membrane effectively suppresses the growth of lithium (Li) dendrites identified by a flat Li deposition. It is attributed to the robustness of the PCP membrane itself and the formation of a mixed ionic/electronic conducting interphase (MCI) intertwined with a solid electrolyte interface (SEI) between the PCP membrane and the Li anode. The MCI-SEI intertwined mixed phase facilitates the homogeneous Li deposition and enhances the cycle stability of the electrolyte/anode interface. Hence, the PCP membrane effectively prevents short-circuiting and shows a good cycling stability of more than 2000 h in a Li/PCP/Li symmetric cell with a current density of 0.2 mA cm(-2). at 60 degrees C. Moreover, the Li/PCP/LiFePO4 all-solid-state battery shows a stable cycling performance with 160 mAh g(-1) at 0.2C after 200 cycles at 60 degrees C. The results show the purposed PCP membrane based on a LATP-coated PE separator is easy to be fabricated and could be practical for many applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available