Exploring Critical Factors Affecting Strain Distribution in 1D Silicon‐Based Nanostructures for Lithium‐Ion Battery Anodes,Advanced Materials

当前位置： X-MOL 学术 › Adv. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Exploring Critical Factors Affecting Strain Distribution in 1D Silicon‐Based Nanostructures for Lithium‐Ion Battery Anodes
Advanced Materials ( IF 27.4 ) Pub Date : 2018-03-07 , DOI: 10.1002/adma.201705430
Yoonkook Son ₁ , Soojin Sim ₁ , Hyunsoo Ma ₁ , Min Choi ₂ , Yeonguk Son ₁ , Noejung Park ₂ , Jaephil Cho ₁ , Minjoon Park ₁

Affiliation

Despite the advantage of high capacity, the practical use of the silicon anode is still hindered by large volume expansion during the severe pulverization lithiation process, which results in electrical contact loss and rapid capacity fading. Here, a combined electrochemical and computational study on the factor for accommodating volume expansion of silicon‐based anodes is shown. 1D silicon‐based nanostructures with different internal spaces to explore the effect of spatial ratio of voids and their distribution degree inside the fibers on structural stability are designed. Notably, lotus‐root‐type silicon nanowires with locally distributed void spaces can improve capacity retention and structural integrity with minimum silicon pulverization during lithium insertion and extraction. The findings of this study indicate that the distribution of buffer spaces, electrochemical surface area, as well as Li diffusion property significantly influence cycle performance and rate capability of the battery, which can be extended to other silicon‐based anodes to overcome large volume expansion.

中文翻译：

探索影响锂离子电池阳极一维硅基纳米结构中应变分布的关键因素

尽管具有高容量的优点，但在严重的粉碎锂化过程中，由于体积膨胀大，硅阳极的实际使用仍然受到阻碍，这会导致电接触损耗和容量快速衰减。在这里，显示了一种结合电化学和计算研究的方法，以适应硅基阳极的体积膨胀系数。设计了具有不同内部空间的一维硅纳米结构，以探索空隙的空间比及其在纤维内部的分布程度对结构稳定性的影响。值得注意的是，具有局部分布空隙空间的lotus型硅纳米线可以提高容量保持性和结构完整性，并且在锂插入和提取过程中硅粉化最少。

更新日期：2018-03-07

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11