Department of Mechanical & Aeronautical Engineering, University of California-Davis, Davis, California 95616, USA.
J Am Chem Soc. 2011 Jun 22;133(24):9144-7. doi: 10.1021/ja200561w. Epub 2011 May 31.
A well characterized and predictable aging pattern is necessary for practical energy storage applications of nanoporous particles that facilitate rapid transport of ions or redox species. Here we use STEM tomography with segmentation to show that surface diffusion and grain boundary diffusion are responsible for pore evolution at intermediate and higher temperatures, respectively. This unprecedented three dimensional understanding of pore behavior as a function of temperature suggests routes for optimizing pore stability in future energy storage materials.
对于有利于离子或氧化还原物种快速传输的纳米多孔颗粒的实际储能应用，需要具有良好特征和可预测的老化模式。在这里，我们使用具有分割功能的 STEM 体视学来表明，表面扩散和晶界扩散分别负责中间和较高温度下的孔演化。这种前所未有的三维温度依赖性孔行为理解为未来储能材料中优化孔稳定性提供了途径。
