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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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Boron-Doped Graphene as Anion-Trapping Reagent in Poly(ethylene oxide)-Based Solid-State Electrolyte
Yi Liang1, Lili Yang1, Jiali Zhang1
1Department of Electronic Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
ACS Applied Materials & Interfaces
|March 10, 2025
Summary
Boron-doped graphene enhances solid polymer electrolytes by trapping anions, boosting ionic conductivity and lithium-ion transference. This leads to stable lithium stripping/plating and improved battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Solid polymer electrolytes (SPEs) are crucial for next-generation batteries.
- Enhancing ionic conductivity and lithium-ion transference simultaneously in SPEs remains a significant challenge.
- Current SPEs often struggle with anion mobility and salt dissociation.
Purpose of the Study:
- To develop a novel strategy for simultaneously improving ionic conductivity and lithium-ion transference in poly(ethylene oxide) (PEO)-based SPEs.
- To investigate the role of boron-doped graphene (BG) as an anion trapper and crystallinity reducer.
- To assess the performance of BG-modified SPEs in all-solid-state lithium-ion batteries.
Main Methods:
- Synthesis and characterization of boron-doped graphene (BG).
- Blending BG into poly(ethylene oxide) (PEO) to form a composite solid polymer electrolyte.
- Electrochemical characterization including ionic conductivity and transference number measurements.
- Fabrication and testing of all-solid-state lithium-ion batteries using the developed electrolyte.
Main Results:
- BG incorporation effectively reduced PEO crystallinity and provided Lewis acid sites for anion trapping.
- The BG-modified PEO electrolyte achieved a high ionic conductivity of 9.27 × 10-5 S cm-1 and a transference number of 0.57 at 25 °C.
- Stable lithium stripping/plating over 1000 hours was observed.
- All-solid-state lithium-ion batteries demonstrated excellent rate capability and cycling stability.
Conclusions:
- Boron-doped graphene serves as an effective anion trapper and PEO crystallinity modifier in solid polymer electrolytes.
- The developed BG-modified PEO electrolyte significantly enhances both ionic conductivity and lithium-ion transference.
- This approach offers a promising pathway for developing high-performance and stable all-solid-state lithium-ion batteries.
Keywords:
Boron-doped grapheneIonic conductivityLithium metal batteryLithium-ion transference numberSolid-state electrolyteMore Related Videos
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