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A Peapod‐like CoP@C Nanostructure from Phosphorization in a Low‐Temperature Molten Salt for High‐Performance Lithium‐Ion Batteries
Author(s) -
Liu Zhiliang,
Yang Sungjin,
Sun Bingxue,
Chang Xinghua,
Zheng Jie,
Li Xingguo
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201805468
Subject(s) - molten salt , nanostructure , lithium (medication) , materials science , chemical engineering , stoichiometry , salt (chemistry) , redox , ion , inorganic chemistry , chemistry , nanotechnology , metallurgy , organic chemistry , medicine , endocrinology , engineering
A mild phosphorization process in low‐temperature molten salt (NaCl‐KCl‐AlCl 3 ) has been developed to synthesize peapod‐like CoP@C nanostructures by using low‐toxicity industrial PCl 3 as the phosphorus source and Mg as the reductant at 250 °C. Importantly, high efficiency of the phosphorous source is achieved since only stoichiometric PCl 3 is required to complete the reaction. The molten NaCl‐KCl‐AlCl 3 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 .