Upcycling of paper waste for high-performance lithium-sulfur batteries
Upcycling of paper waste for high-performance lithium-sulfur batteries
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DOI：
10.1016/j.mtener.2020.100591
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发表时间：
2020-11
影响因子：
9.3
通讯作者：
Yucheng Zhou;Yunya Zhang;Xiaodong Li
中科院分区：
文献类型：
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作者：
Yucheng Zhou;Yunya Zhang;Xiaodong Li
快速发展的电动汽车市场需要环保、高性能和低成本的储能系统。锂硫电池以其较高的理论比容量和较低的成本被认为是锂离子电池的最有前途的替代品。然而，锂硫电池的多硫化物穿梭和锂的降解阻碍了其实际应用。在这项研究中，纤维素纤维（CF）提取回收纸硬质纤维板通过简单的碱处理，然后涂布到聚丙烯隔板真空过滤。当用作锂硫电池隔膜时，CF上的带负电荷的官能团排斥多硫离子并重新分配锂离子，使组装的电池具有优异的上级稳定性和长寿命。具有回收纸CF涂覆的隔膜的锂硫电池表现出超过800次循环的寿命，容量留存率为71.69%，并且在初始化成循环之后几乎没有容量衰减。这一发现表明，可再生生产的CF涂覆的聚丙烯隔板可以同时减少穿梭效应和锂的降解，为商业上可行和环境友好的锂硫电池铺平道路。
The fast-expanding electric vehicle market demands eco-friendly, high-performance, and low-cost energy storage systems. Lithium-sulfur battery with higher theoretical specific capacity and lower cost is regarded as a promising successor to lithium-ion battery. However, lithium-sulfur battery's polysulfide shuttling and lithium degradation have hindered its practical applications. In this study, cellulose fibers (CFs) were extracted from recycled paper hardboards by a simple alkaline treatment and then coated onto polypropylene separators by vacuum filtration. When being used as lithium-sulfur battery separators, the negatively charged functional groups on the CFs repelled polysulfide ions and redistributed lithium ions, enabling the assembled cells' superior stability and long life span. The lithium-sulfur battery with the recycle paper CF-coated separator exhibited a life span of over 800 cycles with a capacity retention rate of 71.69% and nearly no capacity decay after the initial formation cycles. The finding demonstrates that renewably produced, CF-coated polypropylene separators can simultaneously reduce the shuttle effect and degradation of lithium, paving the way toward commercially -viable and environmentally friendly lithium-sulfur batteries.