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Updated: Aug 6, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Ferroelectric Dipole-Driven Solid-Electrolyte Interphase Passivation for High-Voltage Lithium Metal Batteries
Baolei Xu1,2, Yaqin Wu2, Ruohong Ke3
1School of New Energy and Environment, Hunan University of Technology and Business, Changsha, Hunan, China.
Advanced Materials (Deerfield Beach, Fla.)
|August 5, 2026
Summary
A novel ferroelectric layer stabilizes high-voltage lithium metal batteries by preventing side reactions and dendrite growth. This engineered interface improves battery lifespan and safety for next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- High-voltage lithium metal batteries (LMBs) offer high energy density but suffer from interfacial side reactions (ISRs) and lithium dendrite formation.
- These issues lead to active lithium depletion, reduced cycle life, and safety concerns, hindering practical application.
Purpose of the Study:
- To develop a novel interfacial engineering strategy for high-voltage LMBs.
- To suppress interfacial side reactions and lithium dendrite growth for improved stability and performance.
Main Methods:
- Integration of an oxygen-vacancy-engineered BaTiO3 pre-adsorbed with NO3- (BTOVN) layer onto a polypropylene separator.
- Utilizing cryo-electron microscopy and multi-scale spectroscopies to analyze the interface.
- Fabrication and testing of high-voltage Li metal full cells.
Main Results:
- The ferroelectric BTOVN layer selectively targets NO3- anions, promoting reductive decomposition and forming a stable solid-electrolyte interphase (SEI) rich in Li2O, Li3N, and LiF.
- The engineered SEI effectively suppresses ISRs and lithium dendrite proliferation while enhancing Li+ transport.
- High-voltage Li metal full cells demonstrated 89.1% capacity retention after 500 cycles and exceptional stability during long-term resting.
Conclusions:
- The ferroelectric BTOVN layer provides an effective method for passivating the anode/electrolyte interface in high-voltage LMBs.
- Targeting anionic species offers a novel approach to precisely engineer SEI chemistry for enhanced battery performance and safety.
- This strategy significantly improves the long-term storage and cycle stability of LMBs.
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