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Nanospace‐confined synthesis of coconut‐like SnS/C nanospheres for high‐rate and stable lithium‐ion batteries
Author(s) -
Deng Zongnan,
Jiang Hao,
Hu Yanjie,
Li Chunzhong,
Liu Yu,
Liu Honglai
Publication year - 2018
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16068
Subject(s) - anode , nanostructure , electrochemistry , materials science , nanotechnology , chemical engineering , lithium (medication) , nanoparticle , galvanic cell , electrode , chemistry , metallurgy , medicine , endocrinology , engineering
Coconut‐like monocrystalline SnS/C nanospheres are developed as anode materials for lithium‐ion batteries by a micro‐evaporation‐plating strategy in confined nanospaces, achieving reversible capacities as high as 936 mAh g −1 at 0.1 A g −1 after 50 cycles and 830 mAh g −1 at 0.5 A g −1 for another 250 cycles. The remarkably improved electrochemical performances can be mainly attributed to their unique structural features, which can perfectly combine the advantages of the face‐to‐face contact of core/shell nanostructure and enough internal void space of yolk/shell nanostructure, and therefore well‐addressing the pivotal issues related to SnS low conductivity, sluggish reaction kinetics, and serious structure pulverization during the lithiation/delithiation process. The evolutionary process of the nanospheres is clearly elucidated based on experimental results and a multiscale kinetic simulation combining the microscopic reaction‐diffusion equation and the mesoscopic theory of crystal growth. Furthermore, a LiMn 2 O 4 //SnS/C full cell is assembled, likewise exhibiting excellent electrochemical performance. © 2018 American Institute of Chemical Engineers AIChE J , 64: 1965–1974, 2018