Chen Lin, Han Lijing, Liu Xingjiang, Li Yafeng, Wei Mingdeng
Fujian Provincial Key Laboratory of Electrochemical Energy Storage, Materials, Fuzhou University, Fuzhou, 350002, Fujian, P. R. China.
Science and Technology on Power Sources Laboratory, Tianjin Institute of Power Sources, Tianjin, 300384, P. R. China.
Chemistry. 2021 Jan 26;27(6):2104-2111. doi: 10.1002/chem.202004241. Epub 2020 Dec 22.
A general and simple strategy is realized for the first time for the preparation of metal sulfide (M S ) nanoparticles immobilized into N/S co-doped carbon (NSC) through a one-step pyrolysis method. The organic ligand 1,5-naphthalenedisulfonic acid in the metal-organic framework (MOF) precursor is used as a sulfur source, and metal ions are sulfurized in situ to form M S nanoparticles, resulting in the formation of M S /NSC (M=Fe, Co, Cu, Ni, Mn, Zn) composites. Benefiting from the M S nanoparticles and conductive carbon, a synergistic effect of the composite is achieved. For instance, the composite of Fe S /NSC as an anode displays excellent long-term cycling stability in lithium/sodium ion batteries. At 5 A g , large capacities of 645 mA h g and 426.6 mA h g can be retained after 1500 cycles for the lithium-ion battery and after 1000 cycles for the sodium-ion battery, respectively.
首次实现了一种通用且简单的策略，通过一步热解方法制备固定在氮/硫共掺杂碳（NSC）中的金属硫化物（M S）纳米颗粒。金属有机框架（MOF）前驱体中的有机配体1,5-萘二磺酸用作硫源，金属离子原位硫化形成M S纳米颗粒，从而形成M S /NSC（M = Fe、Co、Cu、Ni、Mn、Zn）复合材料。受益于M S纳米颗粒和导电碳，实现了复合材料的协同效应。例如，Fe S /NSC复合材料作为阳极在锂/钠离子电池中表现出优异的长期循环稳定性。在5 A g时，锂离子电池在1500次循环后以及钠离子电池在1000次循环后，分别可保留645 mA h g和426.6 mA h g的大容量。
