Affiliation:
1. State Key Laboratory of Fine Chemicals Chemical Engineering Department Dalian University of Technology Dalian 116024 China
Abstract
AbstractHerein, an integrated structure of single Fe atom doped core‐shell carbon nanoboxes wrapped by self‐growing carbon nanotubes (CNTs) is designed. Within the nanoboxes, the single Fe atom doped hollow cores are bonded to the shells via the carbon needles, which act as the highways for the electron transport between cores and shells. Moreover, the single Fe atom doped nanobox shells is further wrapped and connected by self‐growing carbon nanotubes. Simultaneously, the needles and carbon nanotubes act as the highways for electron transport, which can improve the overall electron conductivity and electron density within the nanoboxes. Finite element analysis verifies the unique structure including both internal and external connections realize the integration of active sites in nano scale, and results in significant increase in electron transfer and the catalytic performance of Fe‐N4 sites in both Li2Sn lithiation and Li2S delithiation. The Li–S batteries with the double‐shelled single atom catalyst delivered the specific capacity of 702.2 mAh g−1 after 550 cycles at 1.0 C. The regional structure design and evaluation method provide a new strategy for the further development of single atom catalysts for more electrochemical processes.
Funder
Fundamental Research Funds for the Central Universities
Liaoning Revitalization Talents Program
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
7 articles.
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