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Walnut-like MoO₂ with interconnected skeleton and opened muti-channel for fast sodium storage

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1088/1361-6528/abaf83
AuthorSearch for: ; Search for: 1ORCID identifier: https://orcid.org/0000-0003-0830-5258; Search for: ; Search for: 1; Search for: ; Search for: ; Search for: ; Search for:
Affiliation
  1. National Research Council of Canada. Nanotechnology
FunderSearch for: State Key Laboratory of Solidification Processing in NWPU; Search for: Academic Team funding; Search for: Provincial Key Academic Leaders Scientific Research Foundation; Search for: Shaanxi Natural Science Foundation of China
FormatText, Article
Physical description10 p.
SubjectMoO₂; walnut; anode material; dual pathway; sodium-ion batteries
Abstract
Molybdenum dioxide (MoO₂) has attracted lots of theoretical interest as an anode material for sodium ion batteries (SIBs) due to its high theoretical capacity (836 mA h g⁻¹) and metallic electrical conductivity (1.9 × 10² S cm⁻¹). The insertion reaction, forming Na0.98MoO₂ and the reversible conversion reaction, forming Mo and Na2O from Na0.98MoO₂ contribute capacities of 209 and 627 mA h g⁻¹, respectively, the latter occupies 75% of the totally theoretical capacity. However, intrinsic slow kinetics in bulk MoO₂ severely restricts the redox conversion reaction. In the present work, a walnut-like MoO₂ architecture (W-MoO₂) with opened multi-channel and interconnected skeleton was prepared in a tube furnace, providing an interconnected ion/electron dual-pathway, which effectively facilitates Na⁺ diffusion and reduces the internal resistance of the cells. The W-MoO₂ anode demonstrates an enhanced reversible sodium storage capacity of 354.7 mA h g⁻¹ at 0.5 A g⁻¹.
Publication date
PublisherIOP
In
  • Nanotechnology 31, no. 47, 475405 (20 November 2020).
LanguageEnglish
Peer reviewedYes
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Record identifier0c666516-cf7e-46f8-9775-1032ae9f4268
Record created2022-07-21
Record modified2022-07-21
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