Liu Zhiliang, Yang Sungjin, Sun Bingxue, Chang Xinghua, Zheng Jie, Li Xingguo
Beijing National Laboratory for Molecular Sciences (BNLMS), The State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China.
Angew Chem Int Ed Engl. 2018 Aug 6;57(32):10187-10191. doi: 10.1002/anie.201805468. Epub 2018 Jul 13.
A mild phosphorization process in low-temperature molten salt (NaCl-KCl-AlCl ) has been developed to synthesize peapod-like CoP@C nanostructures by using low-toxicity industrial PCl 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 is required to complete the reaction. The molten NaCl-KCl-AlCl not only provides a liquid environment but also participates in the electron transport by the reversible conversion of the Al /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 after 800 cycles at a high current of 1.0 A g .
已开发出一种在低温熔盐（NaCl-KCl-AlCl）中进行的温和磷化工艺，以低毒性工业PCl为磷源、Mg为还原剂，在250°C下合成豆荚状CoP@C纳米结构。重要的是，由于仅需化学计量的PCl即可完成反应，因此实现了磷源的高效利用。熔融的NaCl-KCl-AlCl不仅提供了液体环境，还通过Al³⁺/Al氧化还原对的可逆转化参与电子传输。所获得的一维结构中包含零维的豆荚状CoP@C结构表现出优异的锂存储性能，在1.0 A g⁻¹的高电流下循环800次后，提供了500 mAh g⁻¹的极其稳定的容量。
