了解大型圆柱形硫电池的故障机制
Surasak Kaenket1, Salatan Duangdangchote1, Kan Homlamai1
1Centre of Excellence for Energy Storage Technology (CEST), Department of Chemical and Biomolecular Engineering, School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong 21210, Thailand. montree.s@vistec.ac.th.
Chemical communications (Cambridge, England)
|August 3, 2023
概括
大型硫 (Li-S) 电池电池显示显著的容量衰减. 关键故障模式包括电极腐蚀,电解质分解和聚硫化物穿,阻碍性能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 硫 (Li-S) 电池具有较高的理论能量密度.
- 扩大Li-S电池技术的规模带来了重大挑战.
- 了解故障机制对于改善电池寿命至关重要.
研究的目的:
- 为了研究大型圆柱形Li-S电池电池的故障模式.
- 为了确定这些细胞容量衰减的主要原因.
- 为开发更耐用的Li-S电池提供见解.
主要方法:
- 大规模生产18650圆柱形Li-S电池,硫含量为5毫克/厘米-2.2.
- 静电充放电循环,以评估性能和降解.
- 对故障机制的分析,包括电极腐蚀和电解质分解.
主要成果:
- 在静电循环期间观察到显著的容量色.
- 发现的关键故障模式包括电极腐蚀和电解质分解.
- 发现聚硫化物穿效应是导致性能损失的严重因素.
结论:
- 圆柱形Li-S电池电池在运行期间保持容量时面临着巨大的挑战.
- 电极腐蚀,电解质分解和聚硫化物穿是关键的故障途径.
- 解决这些问题对于Li-S电池技术的实际应用至关重要.
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