Authors
Baolei Xu, Yaqin Wu, Ruohong Ke, Kunyun Yan, Chaoping Liang, Libao Chen, Xiaohong Chen, Bing Han, Chunxiao Zhang, Weifeng Wei
Published in
Advanced materials (Deerfield Beach, Fla.). Pages e74496. Aug 05, 2026. Epub Aug 05, 2026.
Abstract
High-voltage lithium (Li) metal batteries (LMBs) are regarded as strong candidates for next-generation high-specific-energy storage devices. However, interfacial side reactions (ISRs) (particularly the often-overlooked chemical corrosion) and Li dendrite lead to severe depletion of active Li and even pose safety hazards, significantly hindering the practical applications of LMBs. Herein, an oxygen-vacancy-engineered BaTiO3 pre-adsorbed with NO3 - (BTOVN) layer is integrated onto a polypropylene separator to selectively lower the energy level of target anion via ferroelectric dipoles, thus passivating the anode/electrolyte interface and improving the long-term storage and cycle stability of LMBs. Combining cryo-electron microscopy with multi-scale spectroscopies, we reveal that the ferroelectric BTOVN layer targets NO3 - to the interface and promotes the reductive decomposition of both NO3 - and PF6 - to form a thinner and tougher solid-electrolyte interphase (SEI) rich in inorganic Li2O, Li3N, and LiF, which effectively suppresses persistent ISRs and Li dendrite proliferation while enhancing Li+ transport kinetics and interfacial stability. As a result, high-voltage Li metal full cells delivery a substantially enhanced capacity retention of 89.1% after 500 cycles, and remarkably, even after long-term resting, they maintain exceptionally stable operation. The work provides a novel perspective on precisely engineering SEI chemistry through targeting anionic species into the interphase layer.
PMID:
42554226
Bibliographic data and abstract were imported from PubMed on 05 Aug 2026.
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