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Hard carbon derived from rice husk as anode material for high performance potassium-ion batteries
Ist Teil von
Solid state ionics, 2020-08, Vol.351, p.115319, Article 115319
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
2020
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Due to the rapid development of the large-scale electric energy storage systems (EESs) and the electric vehicles (EVs), potassium-ion batteries (KIBs) are known as promising alternatives for lithium-ion batteries (LIBs). Here, we synthesized hard carbon via carbonization of rice husk and first studied its electrochemical performances as anode material of KIBs. The hard carbon shows a high reversible capacity of 244.99 mAh·g−1 at the current density of 30 mA·g−1 and stable cycling performance. Even at the high current density of 500 mA·g−1 it still exhibits 103.77 mAh·g−1 after 500 cycles. This work not only provides the application of biomass-based hard carbon as a promising anode material for practical KIBs, but also furthers the knowledge to understand the storage mechanism of K+ in the hard carbon.
•Rice husk was used to prepare hard carbon.•RHC was successfully applied as anode material in potassium-ion batteries.•RHC can still exhibits 103.77 mAh·g−1 after 500 cycles at the high current density of 500 mA·g−1.•This paper studied the storage mechanism of K+ in RHC in detail.