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High-performance lithium-sulfur batteries enabled by regulating Li2S deposition
Qiaowei Lin1,2, Ling Huang1, Wenhua Liu1
1Shenzhen Geim Graphene Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China. lv.wei@sz.tsinghua.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|September 22, 2021
Summary
Controlling lithium sulfide (Li2S) deposition is key to improving lithium-sulfur batteries (LSBs). This study reviews methods like solution-mediated growth and sulfur hosts to enhance Li2S formation for better LSB performance.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium-sulfur batteries (LSBs) offer high theoretical energy density.
- Sulfur conversion to lithium sulfide (Li2S) during discharge leads to insulating Li2S formation.
- This Li2S layer causes sluggish kinetics and electrode passivation, hindering LSB performance.
Purpose of the Study:
- To review recent advancements in controlling Li2S deposition in LSBs.
- To highlight strategies for enhancing LSB performance by regulating Li2S formation.
- To discuss future research directions for practical LSB applications.
Main Methods:
- Summarizing research on solution-mediated growth of Li2S.
- Reviewing sulfur host strategies for enhanced nucleation.
- Analyzing catalysis-induced kinetic improvements for LiPSs to Li2S conversion.
Main Results:
- Regulating Li2S deposition significantly improves LSB performance.
- Solution-mediated growth offers control over Li2S morphology.
- Sulfur hosts and catalysis accelerate LiPSs to Li2S conversion kinetics.
Conclusions:
- Controlling Li2S deposition is crucial for unlocking the potential of LSBs.
- Further research is needed to address challenges and promote practical LSB applications.
- Optimizing Li2S formation is essential for achieving high electrochemical performance in LSBs.
