材料科学
扫描电子显微镜
阴极
蜂巢
比表面积
纳米-
复合材料
离子
化学工程
分析化学(期刊)
纳米技术
化学
色谱法
物理化学
工程类
催化作用
有机化学
生物化学
作者
Seon‐Jin Lee,Yun-Chae Nam,Jong‐Tae Son
摘要
In general, to increase the ionic ( 50 °C), nano-sized particles are exfoliated from the Al current collector during repeated expansion and contraction of the volume of the cathode active material during a cycle. To solve this problem, we designed honeycomb-shaped LiFePO4 positive materials by using a simple sol-gel method with a surfactant. Scanning electron microscopy (SEM) images of the prepared LFP show that the pore size and the wall thickness are approximately 3.01 µm and 112 nm, respectively. The honeycomb-shaped LFP (0.638 m2/g) has a larger specific surface area than does the conventional nano-sized LFP (0.352 m2/g). Compared with conventional nano-sized LFP the LFP with a larger surface area shows an average 2% enhancement in the discharge capacity for all C-rates. The prepared LFP has a better discharge capacity and cycle stability than does the conventional nano-sized LFP.
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