期刊
ADVANCED ENERGY MATERIALS
卷 12, 期 24, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202200368
关键词
all-solid-state lithium batteries; in situ polymerization; integrated solid electrolytes; lithium metal anodes
类别
资金
- National Natural Science Foundation of China [22075025]
- Science and Technology Program of Guangdong Province [2020B0909030004]
- Beijing Natural Science Foundation [L182023]
- Beijing Institute of Technology Research Fund Program for Young Scholars [2019CX04092]
This paper proposes an air-stable and interface-compatible solid electrolyte/lithium integration method for high-performance all-solid-state lithium batteries. The in situ copolymerization technique ensures the stability and efficiency of the batteries, with enhanced cycle stability and dendrite suppression.
All-solid-state lithium batteries (ASSLBs), as the next-generation energy storage system, potentially bridge the gap between high energy density and operational safety. However, the application of ASSLBs is technically handicapped by the extremely weak interfacial contact and dendrite growth that is prone to unstabilize solid electrolyte interphase (SEI) with limited electrochemical performance. In this contribution, air-stable and interface-compatible solid electrolyte/lithium integration is proposed by in situ copolymerization of poly(ethylene glycol methacrylate)-Li1.5Al0.5Ge1.5(PO4)(3)-lithium (PEGMA-LAGP-Li). The first-of-this-kind hierarchy provides a promising synergy of flexibility-rigidity (Young's modulus 3 GPa), high ionic conductivity (2.37 x 10(-4) S cm(-1)), high lithium-ion transfer number (t(Li+ )= 0.87), and LiF-rich SEI, all contributing to homogenized lithium-ion flux, significantly prolonged cycle stability (>3500 h) and obvious dendrite suppression for high-performance ASSLBs. Furthermore, the integration protects lithium from air corrosion, providing insights into a novel interface-enhancement paradigm and realizing the first ASSLBs assembly in ambient conditions without any loss of specific capacity.
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