Journal
ENERGY STORAGE MATERIALS
Volume 45, Issue -, Pages 110-118Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2021.11.035
Keywords
Graphdiyne; Ion selectivity; Lithium-ion battery anode; Interfacial protection; Volume swelling
Funding
- National Key Research and Development Project of China [2018YFA0703501]
- National Natural Science Foundation of China [21790050, 21790051, U1932211, 51802311]
- Key Program of the Chinese Academy of Sciences [QYZDY-SSW-SLH015]
- Foundation of the Youth Innovation Promotion Association of Chinese Academy of Sciences [2019032]
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In this study, a facile method was developed to construct a freestanding transition metal oxides anode with consecutive nanoarrays of yolk-shell nanorods. The obtained anode demonstrated a zero-strain, ultra-stable architecture and interface, leading to high specific capacity and enhanced cycling ability.
Low-strain nanoarchitectures are the precondition for offering a stable electrochemical environment towards high-performance lithium-ion battery anode in the compaction system. Realizing the zero-strain for each particle of high-capacity anode is a scientific challenge, because of huge volume changes arising during the in-sertion/extraction process of Li+ . Herein, we develop a facile and general strategy to construct a freestanding transition metal oxides (TMOs) anode with consecutive nanoarrays of yolk-shell nanorods. By confining the dehydration process in the ion-selective carbon-ene-yne (CEY) nanotubes, free space can be precisely created for alleviating the excessive volume expansion of internal particles. The all-carbon CEY not only conducts the electrons and supports the nanoarchitecture of the anode, but also provides the high-areal-density atomic-level selective channels for Li+ diffusion and prevents the electrolyte from decomposition. The as-obtained strainless anode demonstrates an ultra-stable architecture and interface during cycling, leading to a high specific capacity and enhanced cycling ability. Our result demonstrates the significant advantages to largely produce zero-strain architecture, towards ideally solving the crucial issues confronted in the high-volume-change electrode.
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