State Key Laboratory of Mechanical Transmissions and School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, P. R. China.
Small. 2016 Jan 27;12(4):516-23. doi: 10.1002/smll.201502743. Epub 2015 Dec 8.
A novel LiFePO4 material, in the shape of a nanomesh, has been rationally designed and synthesized based on the low crystal-mismatch strategy. The LiFePO4 nanomesh possesses several advantages in morphology and crystal structure, including a mesoporous structure, its crystal orientation that is along the [010] direction, and a shortened Li-ion diffusion path. These properties are favorable for their application as cathode in Li-ion batteries, as these will accelerate the Li-ion diffusion rate, improve the Li-ion exchange between the LiFePO4 nanomesh and the electrolyte, and reduce the Li-ion capacitive behavior during Li intercalation. So the LiFePO4 nanomesh exhibits a high specific capacity, enhanced rate capability, and strengthened cyclability. The method developed here can also be extended to other similar systems, for instance, LiMnPO4 , LiCoPO4 , and LiNiPO4 , and may find more applications in the designed synthesis of functional materials.
一种新型的 LiFePO4 材料，采用纳米网的形状，基于低晶错配策略进行了合理设计和合成。LiFePO4 纳米网在形貌和晶体结构方面具有多个优势，包括介孔结构、沿[010]方向的晶体取向以及缩短的锂离子扩散路径。这些特性有利于其作为锂离子电池的正极材料，因为这将加速锂离子的扩散速率，改善 LiFePO4 纳米网与电解质之间的锂离子交换，并减少 Li 嵌入过程中的锂离子电容行为。因此，LiFePO4 纳米网表现出高比容量、增强的倍率性能和增强的循环稳定性。这里开发的方法也可以扩展到其他类似的体系，例如 LiMnPO4、LiCoPO4 和 LiNiPO4，并可能在功能材料的设计合成中找到更多的应用。
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