具有低充电电位的 Li-O2 电池用多孔钙钛矿型 LaNiO3 纳米立方体作为阴极催化剂。
Porous perovskite LaNiO3 nanocubes as cathode catalysts for Li-O2 batteries with low charge potential.
机构信息
Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
Institute of Materials Research and Engineering (IMRE), Agency of Science, Technology, and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore.
出版信息
Sci Rep. 2014 Aug 8;4:6005. doi: 10.1038/srep06005.
Developing efficient catalyst for oxygen evolution reaction (OER) is essential for rechargeable Li-O2 battery. In our present work, porous LaNiO3 nanocubes were employed as electrocatalyst in Li-O2 battery cell. The as-prepared battery showed excellent charging performance with significantly reduced overpotential (3.40 V). The synergistic effect of porous structure, large specific surface area and high electrocatalytic activity of porous LaNiO3 nanocubes ensured the Li-O2 battery with enchanced capacity and good cycle stability. Furthermore, it was found that the lithium anode corrosion and cathode passivation were responsible for the capacity fading of Li-O2 battery. Our results indicated that porous LaNiO3 nanocubes represent a promising cathode catalyst for Li-O2 battery.
用于析氧反应 (OER) 的高效催化剂对于可再充电 Li-O2 电池至关重要。在我们目前的工作中，多孔 LaNiO3 纳米立方体制备为 Li-O2 电池中的电催化剂。所制备的电池表现出优异的充电性能，具有显著降低的过电位 (3.40 V)。多孔 LaNiO3 纳米立方体制备的协同效应，具有多孔结构、大比表面积和高电催化活性，确保了 Li-O2 电池具有增强的容量和良好的循环稳定性。此外，研究发现锂阳极腐蚀和阴极钝化是 Li-O2 电池容量衰减的原因。我们的结果表明，多孔 LaNiO3 纳米立方体制备是 Li-O2 电池有前途的阴极催化剂。
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