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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Lithium Azide as an Electrolyte Additive for All-Solid-State Lithium-Sulfur Batteries
Gebrekidan Gebresilassie Eshetu1, Xabier Judez1, Chunmei Li1
1CIC Energigune, Parque Tecnológico de Álava, Albert Einstein 48, 01510, Miñano, Álava, Spain.
Angewandte Chemie (International Ed. in English)
|October 11, 2017
Summary
Lithium azide (LiN₃) improves all-solid-state lithium-sulfur battery stability by forming a protective anode layer. This novel additive enhances performance and longevity, surpassing current standards for next-generation batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium-sulfur (Li-S) batteries offer high theoretical energy density for next-generation energy storage.
- The primary challenge for Li-S batteries is the instability of the lithium-metal (Li°) anode.
- Ensuring long-term stability requires addressing issues like dendrite formation and polysulfide shuttling.
Purpose of the Study:
- To introduce lithium azide (LiN₃) as a novel electrolyte additive for all-solid-state Li-S batteries (ASSLSBs).
- To investigate the effect of LiN₃ on the Li° anode passivation layer.
- To evaluate the impact of LiN₃ on the electrochemical performance and stability of ASSLSBs.
Main Methods:
- Investigated LiN₃ as an electrolyte additive in ASSLSBs.
- Analyzed the passivation layer formed on the Li° anode.
- Evaluated cycling performance, Coulombic efficiency, and energy efficiency.
Main Results:
- LiN₃ forms a thin, compact, and highly conductive passivation layer on the Li° anode.
- This layer effectively suppresses dendrite formation and polysulfide shuttling.
- ASSLSBs with LiN₃ additive demonstrate significantly enhanced cycling performance and efficiency.
Conclusions:
- Lithium azide is a promising additive for stabilizing Li° anodes in ASSLSBs.
- LiN₃ improves the overall performance and longevity of Li-S batteries.
- This finding offers a pathway to overcoming critical challenges in advanced battery technology.
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