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Coal-based hierarchical porous carbon for lithium/potassium storage.
- Source :
-
Materials Chemistry & Physics . Jul2023, Vol. 303, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Carbon-based materials exhibit the advantages of low-operating voltages and non-toxicity and are thus considered promising anode components for potassium-ion batteries (PIBs) and lithium-ion batteries (LIBs). Herein, hydrothermal treatment and KOH activation combined with high-temperature carbonization were employed to fabricate hierarchical porous carbon, in which the low-cost coal as the carbon source. The proposed material shows rich microporous structures that facilitate Li+/K+ adsorption/desorption and promote capacitive contributions, thus improving the dynamics of the electrochemical reaction. CBC-700 (carbonized at 700 °C), as an LIB anode material, delivers a specific capacity of up to 844 mAh g−1, maintains 597 mAh g−1 under 1000 mA g−1 current density, and exhibits excellent capacity reversibility. When applied as a PIB anode material, the reversible specific capacity is preferable, with a value of 314 mAh g−1, and the specific capacity at 500 mA g−1 is 235 mAh g−1, apart from exhibiting excellent capacity reversibility. Significantly, it is highly expected that the coal-based carbon shows potential as an anode for the large-scale production of highly efficient LIBs and PIBs. • The hierarchical porous carbon was prepared by using low-cost coal as the carbon source. • The prepared CBC-700 exhibits a high specific surface area and significant surface capacitive contribution. • The prepared CBC-700 delivers superior electrochemical performance for lithium/potassium ion batteries. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CARBON-based materials
*POTASSIUM ions
*CARBON
*LITHIUM-ion batteries
*SURFACE area
Subjects
Details
- Language :
- English
- ISSN :
- 02540584
- Volume :
- 303
- Database :
- Academic Search Index
- Journal :
- Materials Chemistry & Physics
- Publication Type :
- Academic Journal
- Accession number :
- 163615408
- Full Text :
- https://doi.org/10.1016/j.matchemphys.2023.127835