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Introduction to Solid Supported Membrane Based Electrophysiology
Published on: May 11, 2013
MoCl5-mediated dual-track regulation unlocks high-voltage ether-based quasi-solid-state electrolytes
Youliang Wang1,2, Lingfeng Zhu3,4, Hai Zhang2
1School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
Science Advances
|July 23, 2026
Summary
This study introduces a new method using MoCl5 to stabilize quasi-solid-state lithium metal batteries with poly(1,3-dioxolane) electrolytes, improving performance and enabling high-voltage operation.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Quasi-solid-state lithium metal batteries (QSSLMBs) using in situ-polymerized 1,3-dioxolane (DOL) electrolytes show promise but suffer from low oxidative stability and poor interfacial properties, limiting their use in high-voltage applications.
- Developing stable and robust electrolytes is crucial for advancing next-generation battery technologies.
Purpose of the Study:
- To develop a novel strategy for enhancing the stability and performance of DOL-based electrolytes in QSSLMBs.
- To improve the oxidative tolerance and interfacial integrity of electrolytes for high-voltage battery operation.
Main Methods:
- A simulation-guided dual-track regulation strategy was employed, utilizing Molybdenum pentachloride (MoCl5) as a multifunctional initiator.
- MoCl5 was used to simultaneously initiate ring-opening polymerization of DOL, facilitate lithium salt dissociation, and construct inorganic interphases.
- The formation of a high-molecular-weight poly(1,3-dioxolane) (PDOL) matrix and a LiF/LiCl/LixMoy-enriched solid electrolyte interphase (SEI) and cathode electrolyte interphase (CEI) were promoted.
Main Results:
- The MoCl5-regulated PDOL electrolyte exhibited enhanced bulk stability, improved Li+ transport (transference number of 0.71), and a wider electrochemical stability window of 4.7 V.
- Li||Li symmetric cells demonstrated stable cycling for over 1000 hours at 5 mA cm-2.
- High-voltage Li||LiNi0.8Co0.1Mn0.1O2 (NCM811) cells retained over 95% capacity after 50 cycles at 2 C.
Conclusions:
- The multifunctional initiator strategy effectively addresses the limitations of DOL-based electrolytes, enhancing interfacial robustness and electrochemical stability.
- This approach unlocks the high-voltage potential of ether-based electrolytes, paving the way for practical QSSLMB applications.
- The study establishes a valuable design principle for developing advanced electrolytes using multifunctional initiators.
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