Home > Press > Sieving carbons: Ideal anodes for high-energy sodium-ion batteries
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| Small angle X-ray scattering patterns of (a) porous carbon (PC) and (b) SC anodes before and after (dashed line) 5 full cycles at a current density of 50 mA g-1. Inset: the relative location of the SEI to the nanopores. The SEI is a green irregular shape with yellow solid circles (sodium ions) inside. (c) 1st-cycle charge curves of different SCs at a current density of 50 mA g-1. (d) Charge/discharge curves of a Na3V2(PO4)3//SC-3 full cell from 0.05 A g-1 to 1 A g-1.
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Abstract:
The exponentially increasing implementation of renewable energy systems, such as wind and solar energy, are urgently demanding the development of large-scale energy storage devices with flexibility, high energy conversion efficiency, and simple maintenance. Among diverse candidates, due to the natural abundance and low cost of sodium reserves, sodium-ion batteries (SIBs) have recently captured widespread attention from both the academia and industry as a sustainable supplement to lithium-ion batteries (LIBs).
Sieving carbons: Ideal anodes for high-energy sodium-ion batteries
Beijing, China | Posted on July 1st, 2022
Non-graphitic carbons are the most promising anode candidates for SIBs. However, challenged by their variable and complicated microstructures, what is the ideal carbon anode for SIBs that can play a similar role to what graphite does in lithium-ion batteries and how to rationally design the ideal carbon anodes are fundamental but remains poorly understood. This inevitably impedes the commercialization of SIBs.
Led by Prof. Quan-Hong Yang, Dr. Jun Zhang (Tianjin University) and Prof. Yong Yang (Xiamen University), a recent study proposed sieving carbons (SCs), featuring highly tunable nanopores with the tightened pore entrance, as the practical anodes for high-energy SIBs with the extensible and reversible low-potential charge/discharge plateaus (LPPs,
The proposed sieving carbons is a conceptual advance for the carbon anode design for high-energy SIBs, and potential to play a similar role to what graphite does in lithium-ion batteries. Prof. Quan-Hong Yang said, The structural tunability makes sieving carbons also promising for practical use in high-energy or high-power lithium-ion batteries, potassium-ion batteries and so on.
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Bei Yan
Science China Press
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Quan-Hong Yang
Tianjin University
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