Unlocking Rapid Charging and Extended Lifetimes for Li-Ion Batteries Using Freestanding Quantum Conversion-Type Aerofilm Anode
- 22 October 2021
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 15 (11), 18437-18447
- https://doi.org/10.1021/acsnano.1c08011
Abstract
Batteries capable of quick charging as fast as fossil fuel vehicles are becoming a vital issue in the electric vehicle market. However, conversion-type materials promising as a next-generation anode have many problems to satisfy fast charging and long-term cycles due to their low conductivity and large irreversibility despite a high theoretical capacity. Here, we report effective strategies for a SnO2-based anode to enable rapid-charging, long-cycle, and high reversible capacity. The quantum size of SnO2 nanoparticles uniformly embedded within a 3D conductive carbon matrix as a prerequisite for high reversible capacity increases the interdiffusion layer and facilitates a highly reversible conversion reaction between Li2O/Sn and SnO2. In particular, the Sn–C chemical bond achieves ion-site control and direct electron transfer, enabling boost charging. Further, the robust and porous structure of the binder-free three-dimensional electrode buffers the massive volume expansion during Li insertion/desertion and allows for multidimensional rapid-ion diffusion. As a result, our quantum SnO2 anode delivers a high reversible capacity of about 753 mAh g–1 with a 468% capacity increase after 4000 cycles at 10 C. It also presents a gradually increasing capacity up to 548 mAh g–1 even at 20 C and superior cyclability over 20 000 cycles in capacity stabilization. This study will contribute to designing aerofilm-based conversion-type electrodes for fast charging devices.Funding Information
- National Research Foundation of Korea (2021R1A2C2008715, 2021R1A4A1030318, 2021R1I1A3A04034294)
This publication has 47 references indexed in Scilit:
- A facile route for 3D aerogels from nanostructured 1D and 2D materialsScientific Reports, 2012
- Flexible Free-Standing Graphene/SnO2 Nanocomposites Paper for Li-Ion BatteryACS Applied Materials & Interfaces, 2012
- Defect-Rich Crystalline SnO2 Immobilized on Graphene Nanosheets with Enhanced Cycle Performance for Li Ion BatteriesThe Journal of Physical Chemistry C, 2012
- Improved electrochemical performance of Fe2O3 nanoparticles confined in carbon nanotubesJournal of Materials Chemistry, 2012
- Free-standing single-walled carbon nanotube/SnO2 anode paper for flexible lithium-ion batteriesCarbon, 2012
- SnO2–graphene–carbon nanotube mixture for anode material with improved rate capacitiesCarbon, 2011
- SnO2 nanocrystals deposited on multiwalled carbon nanotubes with superior stability as anode material for Li-ion batteriesJournal of Power Sources, 2011
- Large scale synthesis of nickel oxide/multiwalled carbon nanotube composites by direct thermal decomposition and their lithium storage propertiesJournal of Power Sources, 2011
- Kirkendall-effect-based growth of dendrite-shaped CuO hollow micro/nanostructures for lithium-ion battery anodesJournal of Solid State Chemistry, 2010
- Electrochemical reactivity of ball-milled MoO3−y as anode materials for lithium-ion batteriesJournal of Power Sources, 2009