Related Experiment Video
Updated: Jan 13, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
22.2K
Over 500 Wh kg-1 Solid-State Lithium Metal Batteries with Long Cycling Stability Using In Situ Polymerized
Nuo Xu1,2,3, Xingchen Song1,2,3, Guolin Sun1,2,3
1The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
Journal of the American Chemical Society
|January 7, 2026
Summary
A new POSS-based gel polymer electrolyte (POSS-GPE) enhances lithium metal battery (LMB) performance and safety. This material enables high energy density and stable cycling, addressing key challenges for next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium metal batteries (LMBs) offer high energy density but suffer from dendrite growth, impacting stability and safety.
- Current electrolytes face challenges with oxidative stability and interfacial compatibility, limiting LMB practical application.
Purpose of the Study:
- To develop a novel POSS-based gel polymer electrolyte (POSS-GPE) for high-performance and safe LMBs.
- To investigate the electrolyte's ionic conductivity, electrochemical stability, and interfacial properties.
Main Methods:
- Synthesized an in situ polymerized POSS-GPE with high ionic conductivity and oxidative stability.
- Evaluated electrolyte performance in LiNi0.8Co0.1Mn0.1O2|POSS-GPE|Li full cells and large-capacity pouch cells.
- Assessed interfacial behavior and safety characteristics, including nail-penetration tests.
Main Results:
- POSS-GPE demonstrated high ionic conductivity (3.04 mS cm-1) and excellent oxidative stability (>4.9 V vs Li+/Li).
- Full cells achieved 87.3% capacity retention after 500 cycles; a 6.08 Ah pouch cell reached 511.2 Wh kg-1 energy density and cycled stably at 4.6 V.
- The electrolyte promoted stable interfaces and exhibited intrinsic flame retardancy and superior safety in nail-penetration tests.
Conclusions:
- The POSS-GPE offers a promising strategy for developing high-energy-density and safe lithium metal batteries.
- This electrolyte design mitigates interfacial degradation and enhances cycling stability, paving the way for practical LMBs.
