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Updated: Jan 28, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Engineering the Solid-Electrolyte Interphase via NO3 - Coordination at Open Metal Sites in HKUST-1 for Stable Lithium
Huiling Liu1, Xingkai Jia1, Xuan Zhang1,2
1School of Materials Science and Engineering, Zhejiang University, Hangzhou, China.
Abstract:
Metal-organic frameworks (MOFs) are promising hosts for quasi-solid electrolytes (QSEs) by integrating liquid electrolytes (MOF@LE QSEs), yet stabilizing lithium metal anodes (LMAs) to enhance electrochemical performance remains a challenge. Here, we introduce a strategy leveraging open metal sites (OMSs) in HKUST-1 (Cu3(BTC)2) combined with LiNO3 to tailor solid electrolyte interphase (SEI) chemistry and lithium deposition. OMSs in HKUST-1 anchor NO3 - and promote LiNO3 dissociation, enriching SEI with nitrogen-containing inorganic compounds and enabling uniform and spherical lithium morphology. Consequently, LMAs with LiNO3-incorporated HKUST-1 membrane QSE (HM-LN QSE) achieve a critical current density of 2.7 mA cm-2, with stable lithium plating/stripping over 650 h at 0.2 mA cm-2 and more than 300 h at 0.5 mA cm-2. Moreover, LiLiFePO4 cells assembled with HM-LN QSEs delivere a discharge capacity of 81.2 mAh g-1 at 5 C and retain 81.2% capacity after 350 cycles at 2 C, demonstrating superior electrochemical stability and performance. This innovative MOF-based approach significantly enhances SEI stability and LMA performance, advancing lithium metal battery technology.
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