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Nanocrystal heterostructures of LiCoO2 with conformal passivating shells†
Nanoscale ( IF 5.8 ) Pub Date : 2018-03-22 00:00:00 , DOI: 10.1039/c7nr08612a Bob Jin Kwon 1, 2, 3, 4 , Patrick J. Phillips 2, 3, 4, 5 , Baris Key 4, 6, 7, 8 , Fulya Dogan 4, 6, 7, 8 , John W. Freeland 4, 7, 8, 9, 10 , Chunjoong Kim 1, 2, 3, 4, 11 , Robert F. Klie 2, 3, 4, 5 , Jordi Cabana 1, 2, 3, 4
Nanoscale ( IF 5.8 ) Pub Date : 2018-03-22 00:00:00 , DOI: 10.1039/c7nr08612a Bob Jin Kwon 1, 2, 3, 4 , Patrick J. Phillips 2, 3, 4, 5 , Baris Key 4, 6, 7, 8 , Fulya Dogan 4, 6, 7, 8 , John W. Freeland 4, 7, 8, 9, 10 , Chunjoong Kim 1, 2, 3, 4, 11 , Robert F. Klie 2, 3, 4, 5 , Jordi Cabana 1, 2, 3, 4
Affiliation
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Stabilization of electrode–electrolyte interfaces is required to increase the energy stored in battery electrodes. Introducing redox-inactive ions on the electrode surface minimizes deleterious side reactions without affecting the bulk properties. A synthetic challenge exists to grow such layers conformally at each primary particle, to fully passivate interfaces that are buried in the final electrode architecture. The development of methods of sequential colloidal growth of complex oxides and overlayers, enabled by surfactant interactions, would provide novel means to advance toward this goal. Here, nanocrystals composed of LiCoO2, a commercially relevant material for high energy devices, were grown with a shell enriched in Al3+, deposited conformally through a one-pot colloidal synthetic method. The effects of synthetic conditions on the composition of the Al-rich shell and the corresponding electrochemical performance were investigated. The modified nanocrystals showed enhanced electrochemical properties, while maintaining carrier transport.
中文翻译：
具有共形钝化壳 的LiCoO 2的纳米晶体异质结构†
需要稳定电极与电解质的界面，以增加存储在电池电极中的能量。在电极表面引入氧化还原惰性离子可最大程度减少有害的副反应，而不会影响整体性能。存在合成挑战，以在每个初级粒子上保形地生长这样的层，以完全钝化埋在最终电极体系结构中的界面。通过表面活性剂的相互作用，复合氧化物和覆盖层的连续胶体生长方法的发展将为实现该目标提供新的手段。在此，使用富含Al 3+的壳层生长了由LiCoO 2组成的纳米晶体，LiCoO 2是高能量器件的商业相关材料通过一锅式胶体合成方法共形沉积。研究了合成条件对富铝壳组成及相应电化学性能的影响。改性的纳米晶体显示出增强的电化学性质，同时保持载流子传输。
更新日期：2018-03-22
中文翻译：
具有共形钝化壳 的LiCoO 2的纳米晶体异质结构†
需要稳定电极与电解质的界面，以增加存储在电池电极中的能量。在电极表面引入氧化还原惰性离子可最大程度减少有害的副反应，而不会影响整体性能。存在合成挑战，以在每个初级粒子上保形地生长这样的层，以完全钝化埋在最终电极体系结构中的界面。通过表面活性剂的相互作用，复合氧化物和覆盖层的连续胶体生长方法的发展将为实现该目标提供新的手段。在此，使用富含Al 3+的壳层生长了由LiCoO 2组成的纳米晶体，LiCoO 2是高能量器件的商业相关材料通过一锅式胶体合成方法共形沉积。研究了合成条件对富铝壳组成及相应电化学性能的影响。改性的纳米晶体显示出增强的电化学性质，同时保持载流子传输。
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