Fast rate lithium metal batteries with long lifespan enabled by graphene oxide confinement
Fast rate lithium metal batteries with long lifespan enabled by graphene oxide confinement
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通过氧化石墨烯限制实现具有长寿命的快速锂金属电池
DOI：
10.1039/d3ya00083d
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Shahbazian-Yassar, Reza
中科院分区：
文献类型：
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作者：
Jabbari, Vahid;Yurkiv, Vitaliy;Ghorbani, Alireza;Mashayek, Farzad;Shahbazian-Yassar, Reza
锂(Li)的枝晶生长阻碍了锂金属电池的潜在应用，需要新的方法来应对这一挑战。提出了利用平行排列的氧化石墨烯(GO)在Li金属界面上的强分子相互作用引发的二维材料的约束效应，作为抑制Li枝晶生长的一种新策略。对于两种不同的聚合物隔膜电池：带有多孔丙烯(PP)隔膜的液体电解液和固体聚氧化乙烯(PEO)电解液，显示了定向GO用于锂金属电池的有效性。对于液体电解液，用等离子体处理对PP隔膜进行了改性，以诱导GO层的取向。具有对齐GO的Li‖Li电池显示了稳定的Li压板/剥离(高达1,000个循环)。采用定向氧化锂的Li‖磷酸铁锂电池可在5C下循环1000次(∼容量保持率90%)。对于固体聚合物电解质(SPE)电池，GO-Li限制效应也有效地抑制了Li树枝晶，提高了锂金属电池的稳定性和寿命。经GO修饰的Li‖LFP电池在1C循环200次后，容量保持率为∼的85%。这种组合的高倍率能力和循环次数超过了之前报道的液体和固相萃取基Li‖LFP电池的性能。这为利用二维材料的限制效应开发下一代快速充电锂电池提供了新的机会。
Dendritic growth of lithium (Li) is hindering potential applications of Li-metal batteries, and new approaches are needed to address this challenge. The confinement effect of two-dimensional materials triggered by strong molecular interactions between parallelly-aligned graphene oxide (GO) at Li metal interface is proposed here as a new strategy to suppress the dendritic growth of Li. The effectiveness of aligned GO for Li-metal cells is shown for two different polymer separator cells:liquid electrolytes with porous propylene (PP) separators and solid polyethylene oxide (PEO) electrolytes. For the case of liquid electrolytes, PP separators were modified with plasma treatment to induce the alignment of GO layers. The Li‖Li cells with aligned GO illustrate a stable Li platting/stripping (up to 1000 cycles). The Li‖lithium iron phosphate (LFP) battery cells with aligned GO could cycle at 5C for 1000 cycles (∼90% capacity retention). For solid polymer electrolyte (SPE) cells, GO–Li confinement effect is also effective in Li dendrites suppression enhancing the stability and lifespan of Li-metal batteries. The Li‖LFP cell with the GO-modified SPE showed ∼85% capacity retention after 200 cycles at 1C. Such combined high rate capability and number of cycles exceeds the previously reported performances for both liquid and SPE-based Li‖LFP cells. This points to a new opportunity for utilizing the confinement effect of two-dimensional materials for the development of next generation, fast rate rechargeable Li batteries.