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首页> 外文期刊>RSC Advances >Industrialization of tailoring spherical cathode material towards high-capacity, cycling-stable and superior low temperature performance for lithium-ion batteries
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Industrialization of tailoring spherical cathode material towards high-capacity, cycling-stable and superior low temperature performance for lithium-ion batteries

机译：用于锂离子电池的高容量，循环稳定和卓越的低温性能的剪裁球形阴极材料的工业化

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Three different types of spherical cathodes (Li[Ni _(0.6) Co _(0.2) Mn _(0.2) ]O _(2) ) were synthesized via hydroxide co-precipitation method coupled with high temperature lithiation process. The particle size, nanostructure, specific surface area and pore distributions can be controlled as expected. X-ray diffraction patterns revealed that the as-obtained cathode materials had a typical hexagonal α-NaFeO _(2) layered structure with a space group R m . The electrochemical measurements demonstrate that Li[Ni _(0.6) Co _(0.2) Mn _(0.2) ]O _(2) with 3 μm-size in diameter exhibited higher initial coulombic efficiency (94.9%), rate capacity (156 mA h g ~(?1) at 900 mA g ~(?1) ), and low-temperature property (157 mA h g ~(?1) at 180 mA g ~(?1) , 0 °C) in comparison with the larger one (12 μm). Most impressively, an ultra-stable capacity of 156 mA h g ~(?1) can be retained at 180 mA g ~(?1) even after 300 cycles at 0 °C. As is known, Li[Ni _(0.6) Co _(0.2) Mn _(0.2) ]O _(2) with 3 μm-size has the best result among the reported Li[Ni _(0.6) Co _(0.2) Mn _(0.2) ]O _(2) -based cathode materials. The excellent electrochemical performance of the smaller size cathode results from the advantageous hierarchical nanorods architecture, porous characteristics, and reduced ions/electrons transport path.
机译：通过氢氧化物共沉淀法与高温锂锂化方法合成三种不同类型的球形阴极（Li [Ni _（0.6）CO _（0.2）Mn _（0.2）] O _（2））。可以按预期控制粒度，纳米结构，比表面积和孔分布。 X射线衍射图案显示出可获得的阴极材料具有典型的六方α-Nafeo _（2）分层结构，具有空间组R m。电化学测量表明，Li [Ni _（0.6）Co _（0.2）Mn _（0.2）] O _（2）直径为3μm尺寸，初始初始库仑效率（94.9％），速率容量（156 mA Hg〜（α1）在900 mA g〜（α1））和低温性质（157 mA hg〜（Δ1），与较大的相比一个（12μm）。最令人印象深刻地，即使在0℃下300次循环后，也可以在180mA g〜（α1）的超稳定容量。众所周知，Li [Ni _（0.6）Co _（0.2）Mn _（0.2）] o _（2）具有3μm尺寸的最佳结果，所以报告的LI [Ni _（0.6）Co _（0.2 ）Mn _（0.2）] O _（2）的阴极材料。较小尺寸阴极的优异电化学性能由有利的分层纳米座架构，多孔特性和降低的离子/电子传输路径产生。

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