Effect of Side-Plane Width on Lithium-Ion Transportation in Additive-Free LiCoO2 Crystal Layer-Based Cathodes for Rechargeable Lithium-Ion Batteries
Effect of Side-Plane Width on Lithium-Ion Transportation in Additive-Free LiCoO2 Crystal Layer-Based Cathodes for Rechargeable Lithium-Ion Batteries
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DOI：
10.1021/acs.jpcc.6b06279
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发表时间：
2016-08
影响因子：
3.7
通讯作者：
Dae-wook Kim;N. Zettsu;Y. Mizuno;Katsuya Teshima
中科院分区：
文献类型：
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作者：
Dae-wook Kim;N. Zettsu;Y. Mizuno;Katsuya Teshima
高度专业化的应用需要具有改进的性能（包括更高的功率、更高的能量密度和上级循环性能）的可再充电锂离子电池（LIB）。设计和合成具有有效形状并被合适的表面包围以用于锂离子传输的阴极材料对于高性能锂离子电池至关重要。在目前的工作中，我们解决的影响，侧平面宽度上的锂离子扩散系数和电荷转移电阻的无添加剂的LiCoO 2电极组成的高度控制的晶体与暴露的{101}，{012}，和{104}面。使用电子显微镜观察和X射线衍射测量的LiCoO 2晶体中的形状和取向顺序的变化进行了评价。当LiCoO 2晶体的侧面宽度从约100 μ m增加到约130 μ m时，放电容量从87.9 mA·h·g-1急剧增加到131.5 mA·h·g-1。11、我的59 nm。电化学阻抗谱表明，锂离子扩散过程是一个复杂的过程。
Rechargeable lithium-ion batteries (LIBs) with improved performance, including higher power, higher energy density, and superior cycling performance, are in demand for highly specialized applications. The design and synthesis of cathode materials with effective shapes surrounded by suitable faces for Li-ion transportation are essential for high-performance LIBs. In the present work, we address the effects of side-plane width on the Li-ion diffusion coefficient and charge transfer resistance of additive-free LiCoO2 electrodes composed of highly controlled crystals with exposed {101}, {012}, and {104} faces. The changes in the shape and order of orientation in the LiCoO2 crystals were evaluated using electron microscopic observations and X-ray diffraction measurements. The discharge capacity drastically increased from 87.9 to 131.5 mA·h·g–1 on increasing the width of the side plane in the LiCoO2 crystal from ca. 11 to ca. 59 nm. Further, electrochemical impedance spectroscopy revealed that the Li-ion diffus...