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Rational Design of a P2-Type Spherical Layered Oxide Cathode for High-Performance Sodium-Ion Batteries.
ACS Central Science ( IF 12.7 ) Pub Date : 2019-12-06 , DOI: 10.1021/acscentsci.9b00982 Jun Xiao 1 , Fan Zhang 2 , Kaikai Tang 1 , Xiao Li 1 , Dandan Wang 1 , Yong Wang 1 , Hao Liu 1, 2 , Minghong Wu 1 , Guoxiu Wang 2
ACS Central Science ( IF 12.7 ) Pub Date : 2019-12-06 , DOI: 10.1021/acscentsci.9b00982 Jun Xiao 1 , Fan Zhang 2 , Kaikai Tang 1 , Xiao Li 1 , Dandan Wang 1 , Yong Wang 1 , Hao Liu 1, 2 , Minghong Wu 1 , Guoxiu Wang 2
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Sodium-ion batteries (SIBs) have been regarded as the most promising candidates for the next-generation energy storage devices owing to their low price and high abundance. However, the development of SIBs is mainly hindered by the instability of cathode materials. Here, we report a new P2-type manganese-rich cathode material, Na0.66Li0.18Mn0.71Mg0.21Co0.08O2 (P2-NaLiMMCO) with uniform spherical structure prepared via a simple solvothermal method and subsequent solid-state reaction. This P2-NaLiMMCO cathode material with uniform microsize secondary spheres and nanosize primary crystalline particles delivers a high initial discharge capacity of 166 mA h g-1 and superior capacity retention, which are superior to most previously reported results. The improved stability of the cathode material was further investigated by the in situ X-ray diffraction technique, which suggests an enhanced reversibility of the cathode material during the desodiation/sodiation process. With the superior electrochemical performance and stable structures, this new P2-NaLiMMCO can serve as a practical cathode material for SIBs.
中文翻译：
高性能钠离子电池的P2型球形分层氧化物阴极的合理设计。
由于钠离子电池（SIB）的价格低廉且数量丰富，因此被视为下一代储能设备的最有希望的候选者。然而，SIB的发展主要受到阴极材料的不稳定性的阻碍。在这里，我们报告了一种新的P2型富锰阴极材料，Na0.66Li0.18Mn0.71Mg0.21Co0.08O2（P2-NaLiMMCO），具有通过简单的溶剂热法和随后的固态反应制备的均匀球形结构。这种P2-NaLiMMCO阴极材料具有均匀的微米级次级球和纳米级初级结晶颗粒，可提供166 mA h g-1的高初始放电容量和优异的容量保持率，这优于以前报道的大多数结果。通过原位X射线衍射技术进一步研究了正极材料稳定性的提高，这表明在脱盐/碱化过程中正极材料的可逆性得到了增强。凭借优异的电化学性能和稳定的结构，这种新型P2-NaLiMMCO可以用作SIB的实用阴极材料。
更新日期：2019-12-27
中文翻译：
高性能钠离子电池的P2型球形分层氧化物阴极的合理设计。
由于钠离子电池（SIB）的价格低廉且数量丰富，因此被视为下一代储能设备的最有希望的候选者。然而，SIB的发展主要受到阴极材料的不稳定性的阻碍。在这里，我们报告了一种新的P2型富锰阴极材料，Na0.66Li0.18Mn0.71Mg0.21Co0.08O2（P2-NaLiMMCO），具有通过简单的溶剂热法和随后的固态反应制备的均匀球形结构。这种P2-NaLiMMCO阴极材料具有均匀的微米级次级球和纳米级初级结晶颗粒，可提供166 mA h g-1的高初始放电容量和优异的容量保持率，这优于以前报道的大多数结果。通过原位X射线衍射技术进一步研究了正极材料稳定性的提高，这表明在脱盐/碱化过程中正极材料的可逆性得到了增强。凭借优异的电化学性能和稳定的结构，这种新型P2-NaLiMMCO可以用作SIB的实用阴极材料。
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