A Peapod‐like CoP@C Nanostructure from Phosphorization in a Low‐Temperature Molten Salt for High‐Performance Lithium‐Ion Batteries. (13th July 2018)

• Record Type: Journal Article
• Authors: Liu, Zhiliang; Yang, Sungjin; Sun, Bingxue; Chang, Xinghua; Zheng, Jie; Li, Xingguo
• Is Part Of: Angewandte Chemie. Volume 130:Number 32(2018)
• Page Start: 10344
• Page End: 10348
• Publication Date: 2018-07-13
• Subjects: Cobalt -- Lithiumionenbatterien -- Magnesium -- Niedertemperatur-Salzschmelzen -- Übergangsmetallphosphide; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201805468
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: A mild phosphorization process in low‐temperature molten salt (NaCl‐KCl‐AlCl3 ) has been developed to synthesize peapod‐like CoP@C nanostructures by using low‐toxicity industrial PCl3 as the phosphorus source and Mg as the reductant at 250 °C. Importantly, high efficiency of the phosphorous source is achieved since only stoichiometric PCl3 is required to complete the reaction. The molten NaCl‐KCl‐AlCl3 not only provides a liquid environment but also participates in the electron transport by the reversible conversion of the Al 3+ /Al redox couple. The obtained 0D‐in‐1D peapod CoP@C structure exhibits excellent lithium storage performance, delivering a superiorly stable capacity of 500 mAh g −1 after 800 cycles at a high current of 1.0 A g −1 .