Sodium Quasi‐Intercalation in Black P for Superior Sodium‐Ion Battery Anodes,Batteries & Supercaps

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Sodium Quasi‐Intercalation in Black P for Superior Sodium‐Ion Battery Anodes
Batteries & Supercaps ( IF 5.1 ) Pub Date : 2020-09-22 , DOI: 10.1002/batt.202000188
Tae-Hyun Kim ₁ , Cheol-Min Park ₂

Affiliation

Herein, a Na quasi‐intercalation concept in black P is developed in order to achieve superior P‐based Na‐ion battery (NIB) anodes. Firstly, black P with a puckered layer structure is synthesized via a simple solid‐state reaction using commercially available red P. Additionally, an amorphous carbon modified black P nanocomposite (black P@C) is prepared to optimize its electrochemical Na reversibility. Furthermore, the Na reaction pathways of black P are demonstrated using various ex situ analytical tools. During sodiation/desodiation, black P undergoes the two‐step reactions of sequential quasi‐intercalation of NaP formation (at 0.25 V) and conversion of Na₃P formation (at 0 V). Interestingly, black P@C shows poor cycling performance when using the conversion reaction, but it shows superior performance when using the quasi‐intercalation reaction between black P and NaP. Therefore, we anticipate that the Na quasi‐intercalation in black P@C will lead to high‐performance NIB anodes.

中文翻译：

黑色P中的钠准插层，用于高级钠离子电池阳极

本文中，开发了黑色P中的Na准插入概念，以实现出色的P型Na离子电池（NIB）阳极。首先，使用市售的红色P通过简单的固相反应合成具有褶皱层结构的黑色P。此外，制备了无定形碳改性的黑色P纳米复合材料（黑色P @ C）以优化其电化学Na可逆性。此外，使用各种异位分析工具证明了黑P的Na反应途径。在蒸煮/除灰过程中，黑P经历NaP形成（在0.25 V下）准Na-P顺序相继嵌入和Na ₃转化的两步反应P的形成（在0 V时）。有趣的是，黑色P @ C在使用转化反应时显示出较差的循环性能，但在使用黑色P和NaP之间的准插入反应时显示出优异的性能。因此，我们预计黑色P @ C中的Na准插入将导致高性能NIB阳极。

更新日期：2020-09-22

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