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Published on: August 2, 2012
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Improving Fast-Charging Performance of Lithium-Ion Batteries through Electrode-Electrolyte Interfacial Engineering
Seungwon Kim1, Sewon Park1, Minjee Kim1
1Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 22, 2024
Summary
A new additive, isosorbide 2,5-dimethanesulfonate (ISDMS), enhances lithium-ion battery performance by creating a stable solid-electrolyte interphase (SEI). This improves lifespan and fast-charging capabilities for NCM811/graphite cells.
Area of Science:
- Electrochemistry
- Materials Science
- Battery Technology
Background:
- The solid-electrolyte interphase (SEI) is crucial for lithium-ion battery longevity and fast charging.
- Conventional additives like vinyl carbonate (VC) can form rigid SEI layers hindering ion transport.
Purpose of the Study:
- To introduce a novel additive, isosorbide 2,5-dimethanesulfonate (ISDMS), for improved SEI formation.
- To investigate ISDMS's effect on anode-electrolyte interactions and battery performance.
Main Methods:
- Synthesized ISDMS with a polar, oxygen-rich motif.
- Investigated SEI formation mechanism involving Li+ and PF6- coordination with ISDMS.
- Evaluated full cell performance of NCM811/graphite batteries with ISDMS.
Main Results:
- ISDMS promotes the formation of an ionically conductive and electrochemically stable SEI.
- ISDMS enhances fast-charging capability and lifespan of NCM811/graphite full cells.
- Sacrificial oxidation of ISDMS creates a stable cathode-electrolyte interface, improving electrolyte and cathode stability at 4.4 V.
Conclusions:
- ISDMS is a promising additive for developing high-performance lithium-ion batteries.
- The developed SEI and cathode-electrolyte interface contribute to enhanced stability and cycling life.
- ISDMS offers a pathway to overcome limitations of conventional SEI additives.
