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Highly Dispersed ZnSe Nanoparticles Embedded in N‐Doped Porous Carbon Matrix as an Anode for Potassium Ion Batteries
Author(s) -
Hu Yi,
Lu Tiantian,
Zhang Ya,
Sun Yongwen,
Liu Jinlong,
Wei Denghu,
Ju Zhicheng,
Zhuang Quanchao
Publication year - 2019
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201900199
Subject(s) - anode , materials science , calcination , nanoparticle , chemical engineering , pyrolysis , zeolitic imidazolate framework , electrochemistry , porosity , carbon fibers , metal organic framework , nanotechnology , inorganic chemistry , catalysis , chemistry , electrode , adsorption , organic chemistry , composite material , composite number , engineering
Advanced nanostructured functional materials obtained from the precursors of metal–organic frameworks show several unique advantages, including plentiful porous structures and large specific surface areas. Based on this, designed and constructed are highly dispersed ZnSe nanoparticles anchored in a N‐doped porous carbon rhombic dodecahedron (ZnSe@NDPC) by a sequential high‐temperature pyrolysis and selenization method. The specific synthesis process involves a two‐step heat treatment of the template‐engaged reaction between zinc‐based zeolitic imidazolate framework (ZIF‐8) and selenium power. By optimizing the calcination temperature, the as‐synthesized ZnSe@NDPC‐700 as an advanced anode of potassium ion batteries demonstrates the best electrochemical performance, including a high capacity (262.8 mA h g −1 over 200 cycles at 100 mA g −1 ) and a good rate capability (109.4 mA h g −1 at 2000 mA g −1 and 52.8 mA h g −1 at 5000 mA g −1 ). Moreover, the capacitance and diffusion mechanisms are also investigated by the qualitative and quantitate analysis, finally accounting for the superior K storage.