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
down
wechat
bug