High Energy Density Lithium-Sulfur Batteries: Challenges of Thick Sulfur Cathodes
High Energy Density Lithium-Sulfur Batteries: Challenges of Thick Sulfur Cathodes
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DOI：
10.1002/aenm.201402290
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发表时间：
2015-08-19
影响因子：
27.8
通讯作者：
Xiao, Jie
中科院分区：
文献类型：
--
作者：
Lv, Dongping;Zheng, Jianming;Xiao, Jie
近年来，由于绿色交通和大规模储能应用对先进储能技术的迫切需求，高能量、高性价比的锂硫(Li-S)电池技术被大力重新审视。然而，由于基础研究与实际应用需求之间的科学知识差距，锂S电池的市场渗透率一直受到困扰。本文提出了一种简便有效的方法，将商业碳纳米粒子集成到微米级二次碳纳米粒子中，用于高负荷硫电极。含有集成粒子的浆料很容易浇铸成具有实用质量负载的电极层压板。成功地获得了均匀、无裂纹的涂层，硫磺负载量为2~8 mg cm(-2)。在获得厚电极的基础上，研究和讨论了表面比容量与质量负载的关系、影响电极性能的因素以及解决存在问题的措施。
High energy and cost-effective lithium sulfur (Li-S) battery technology has been vigorously revisited in recent years due to the urgent need of advanced energy storage technologies for green transportation and large-scale energy storage applications. However, the market penetration of Li-S batteries has been plagued due to the gap in scientific knowledge between the fundamental research and the real application need. Here, a facile and effective approach to integrate commercial carbon nanoparticles into microsized secondary ones for application in high loading sulfur electrodes is proposed The slurry with the integrated particles is easily cast into electrode laminates with practically usable mass loadings. Uniform and crack-free coating with high loading of 2-8 mg cm(-2) sulfur are successfully achieved. Based on the obtained thick electrodes, the dependence of areal specific capacity on mass loading, factors influencing electrode performance, and measures used to address the existing issues are studied and discussed.