Red Phosphorus Nanoparticle@3D Interconnected Carbon Nanosheet Framework Composite for Potassium‐Ion Battery Anodes,Small

当前位置： X-MOL 学术 › Small › 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.)

Red Phosphorus Nanoparticle@3D Interconnected Carbon Nanosheet Framework Composite for Potassium‐Ion Battery Anodes
Small ( IF 13.0 ) Pub Date : 2018-07-19 , DOI: 10.1002/smll.201802140
Peixun Xiong ₁ , Panxing Bai ₁ , Shuibin Tu ₁ , Mingren Cheng ₁ , Jinfeng Zhang ₂ , Jie Sun ₃ , Yunhua Xu _{1,

4}

Affiliation

Red phosphorus (P) has been recognized as a promising storage material for Li and Na. However, it has not been reported for K storage and the reaction mechanism remains unknown. Herein, a novel nanocomposite anode material is designed and synthesized by anchoring red P nanoparticles on a 3D carbon nanosheet framework for K‐ion batteries (KIBs). The red P@CN composite demonstrates a superior electrochemical performance with a high reversible capacity of 655 mA h g⁻¹ at 100 mA g⁻¹ and a good rate capability remaining 323.7 mA h g⁻¹ at 2000 mA g⁻¹, which outperform reported anode materials for KIBs. The transmission electron microscopy and theoretical calculation results suggest a one‐electron reaction mechanism ofP + K⁺ + e⁻→ KP, corresponding to a theoretical capacity of 843 mA h g⁻¹,which is the highest value for anode materials investigated for KIBs. The study not only sheds light on the rational design of high performance red P anodes for KIBs but also offers a fundamental understanding of the potassium storage mechanism of red P.

中文翻译：

红磷纳米粒子@3D互连碳纳米片框架复合材料用于钾离子电池负极

红磷（P）已被认为是一种有前途的锂和钠存储材料。然而，目前尚未见关于K储存的报道，其反应机理仍不清楚。在此，通过将红色 P 纳米颗粒锚定在 K 离子电池（KIB）的 3D 碳纳米片框架上，设计并合成了一种新型纳米复合阳极材料。红色P@CN复合材料表现出优异的电化学性能，在100 mA g ^-1时具有655 mA hg ^-1的高可逆容量，在2000 mA g ^-1时仍具有良好的倍率性能，仍为323.7 mA hg ^-1 ，优于报道的阳极KIB 材料。透射电镜和理论计算结果表明单电子反应机制为P + K ⁺ + e ^- → KP，对应的理论容量为843 mA hg ^-1 ，这是目前研究的KIB负极材料的最高值。该研究不仅揭示了KIB高性能红磷阳极的合理设计，而且为红磷的储钾机制提供了基本的了解。

更新日期：2018-07-19

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