互补的弱点:rGO/CdS的双赢方法,以提高集成光充电Li-S电池的能量转换性能
Tianzhen Yang1, Haoning Mao1, Qianqian Zhang1
1Key Laboratory for Biobased Materials and Energy of Ministry of Education, Guangdong Laboratory for Lingnan Modern Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China.
Angewandte Chemie (International ed. in English)
|March 14, 2024
概括
这项研究引入了使用rGO/CdS的可光充电集成硫电池 (PRLSB) 的新方法. 该系统通过减少聚硫化物穿效应和提高光腐蚀稳定性来增强太阳能储能,提高电池性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 可再生能源储存可再生能源的储存
背景情况:
- 可持续的能源储存至关重要,集成太阳能系统提供了一个有前途的途径.
- 硫电池 (LSB) 面临着诸如聚硫化物穿效应和光电腐蚀等挑战,限制了它们的效率.
- 现有的光充电集成硫电池 (PRLSB) 需要提高稳定性和能量转换.
研究的目的:
- 开发一种双功能光电极,以提高PRLSB的性能.
- 为了减轻聚硫化物穿效应,并在基于CdS的系统中提高光腐蚀稳定性.
- 提高PRLSBs的太阳能到电能转换效率.
主要方法:
- 制造用于PRLSBs的减少氧化石墨烯/硫化 (rGO/CdS) 复合材料.
- 在太阳辐射下对聚硫化物定和光电腐蚀稳定性的研究.
- 电化学性能测试,包括排放特定容量和长期循环.
- 光谱分析 (XPS,拉曼) 了解材料的行为和反应机制.
主要成果:
- 在阳光下,CdS有效地定了聚硫化物,显著减少了穿效应.
- 与黑暗条件相比,PRLSB在1°C时显示出排放特定容量的113.3%提高 (971.30 mAh g-1).
- 取得了突破性的太阳能到电能转换效率5.04%,在1.5小时的光照后21小时的放电.
- 光谱分析证实了增强的氧化还原动力学和抑制的聚硫化物溶解.
结论:
- 这种rGO/CdS复合材料可以作为PRLSB的有效的双功能光电极.
- 这一战略成功地解决了LSB的关键局限性,并提高了太阳能利用率.
- 开发的PRLSB显示了未来离网光电池应用的巨大潜力.
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