A robust solvothermal-driven solid-to-solid transition route from micron SnC 2 O 4 to tartaric acid-capped nano-SnO 2 anchored on graphene for superior lithium and sodium storage
Tin dioxide (SnO 2 ) has been widely implemented as an advanced anode material for lithium or sodium ion batteries (LIBs/SIBs) owing to its high capacity and moderate potential. However, conventional synthetic approaches often yield large-sized SnO 2 , which suffers from low conductivity, huge volum...
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Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 11; no. 1; pp. 53 - 67 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
20.12.2022
|
Online Access | Get full text |
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Summary: | Tin dioxide (SnO
2
) has been widely implemented as an advanced anode material for lithium or sodium ion batteries (LIBs/SIBs) owing to its high capacity and moderate potential. However, conventional synthetic approaches often yield large-sized SnO
2
, which suffers from low conductivity, huge volume expansion and Sn coarsening issues, hampering its practical implementation. Herein, a unique solvothermal-driven solid-to-solid transition (SDSST) strategy is developed to craft tartaric acid (TA) capped ultrafine SnO
2
nanoparticles (NPs)
in situ
on sacrificial SnC
2
O
4
microrods. Ball-milling combined with solvent evaporation treatment realizes the homogeneous composition and precise mass ratio control of TA-capped SnO
2
NPs and reduced graphene oxide (rGO). Remarkably, the SnO
2
NPs-rGO nanocomposite manifests outstanding lithium and sodium storage capacities of 1775 and 463 mA h g
−1
after 800 and 100 cycles at 1000 and 20 mA g
−1
, respectively, and an ultralong lifespan of 4000 cycles for LIBs. Notably, systematic electrochemical and componential characterization of the cycled electrodes reveals that SnO
2
NPs-rGO manifests fully reversible three-step lithiation–delithiation reactions of SnO
2
and a primary highly reversible sodiation–desodiation conversion reaction between Sn and SnO combined with a secondary partially reversible alloying–dealloying reaction between Sn and Na
x
Sn (0 ≤
x
≤ 3.75) for lithium and sodium storage, respectively. The even encapsulation of TA-capped SnO
2
NPs in the rGO matrix enables effectively suppressed volume expansion for outstanding structural stability, significantly accelerated ion/electron transport for superior reaction kinetics, greatly prohibited Sn coarsening for enhanced cycle reversibility, and dramatically increased capacitive capacity for additional energy storage. As such, the SDSST approach may represent a facile yet robust strategy for crafting a variety of nanomaterials of interest with appropriate metastable solids as the precursor under the assistance of efficient capping agents. |
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ISSN: | 2050-7488 2050-7496 |
DOI: | 10.1039/D2TA07435D |