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Low‐Temperature Synthesis of Honeycomb CuP 2 @C in Molten ZnCl 2 Salt for High‐Performance Lithium Ion Batteries
Author(s) -
Liu Zhiliang,
Yang Shaolei,
Sun Bingxue,
Yang Piaoping,
Zheng Jie,
Li Xingguo
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201910474
Subject(s) - molten salt , lithium (medication) , honeycomb , materials science , chemical engineering , composite number , salt (chemistry) , inorganic chemistry , metal , metallurgy , chemistry , composite material , endocrinology , medicine , engineering
Phosphorus‐rich metal phosphides have very high lithium storage capacities, but they are difficult to prepare. A low‐temperature phosphorization method based on Mg reducing PCl 3 in ZnCl 2 molten salt at 300 °C is developed to synthesize phosphorus‐rich CuP 2 @C from a Cu‐MOF derived Cu@C composite. Abnormal oxidation of Cu by Zn 2+ in the molten salt is observed, which leads to the porous honeycomb nanostructure and homogeneously distributed ultrafine CuP 2 nanocrystals. The honeycomb CuP 2 @C exhibits excellent lithium storage performance with high reversible capacity (1146 mAh g −1 at 0.2 A g −1 ) and superior cycling stability (720 mAh g −1 after 600 cycles at 1.0 A g −1 ), showing the promising application of P‐rich metal phosphides in lithium ion batteries.