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A Biomimetic‐Mineralization‐Inspired Hybrid Mesocrystal with Boosted Lithium Storage Properties
Author(s) -
Fei Xiang,
Li Wei,
Zhu Meifang
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202000092
Subject(s) - anode , materials science , electrochemistry , carbonization , fibroin , nanotechnology , hematite , hybrid material , electrode , annealing (glass) , lithium (medication) , chemical engineering , composite material , chemistry , metallurgy , silk , scanning electron microscope , medicine , engineering , endocrinology
Smart controlling the structure and composition of hybrid anode materials to boost the electrochemical performance is still challenging yet significant for lithium ion batteries (LIBs). Herein, a biomimetic strategy is reported for the synthesis of mesostructured Fe 3 O 4 @N‐doped carbon (Fe 3 O 4 @CN) hybrid anodes, inspired by structural features and hybrid compositions of the biomineralized mesocrystals. By using the regenerated silk fibroin (RSF)‐biomineralized hematite (ɑ‐Fe 2 O 3 ) as a single precursor (RSF‐Fe 2 O 3 ) followed by a simple annealing treatment, its interspaced RSF‐templates can be carbonized in situ to a kind of RSF‐derived CN material, which can further reduce the ɑ‐Fe 2 O 3 to Fe 3 O 4 , generating Fe 3 O 4 @CN hybrid mesocrystal. Such a biomimetically designed hybrid mesostructure concurrently possesses electrochemically favorable features with abundant internal voids and uniformly introduced carbonaceous layer. Owing to these distinctive structural and compositional merits, the Fe 3 O 4 @CN electrode exhibits remarkable lithium storage properties embracing high capacity, outstanding rate capability, as well as long‐term stable cycling life.