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Potassium-Hydrogen Hybrid Ion Alkaline Battery: A New Rechargeable Aqueous Battery Combined a K + Storage Cathode and an Electrochemical Hydrogen Storage Anode.
- Source :
-
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2024 Apr 10. Date of Electronic Publication: 2024 Apr 10. - Publication Year :
- 2024
- Publisher :
- Ahead of Print
-
Abstract
- A rechargeable aqueous hybrid ion alkaline battery, using a proton and a potassium ion as charge carriers for the anode and cathode, respectively, is proposed in this study by using well-developed potassium nickel hexacyanoferrate as the cathode material and mesoporous carbon sheets as the anode material, respectively. The constructed battery operates in a concentrated KOH solution, in which the energy storage mechanism for potassium nickel hexacyanoferrate involves the redox reaction of Fe <superscript>2+</superscript> /Fe <superscript>3+</superscript> associated with potassium ion insertion/extraction and the redox reaction of Ni(OH) <subscript>2</subscript> /NiOOH. The mechanism for the carbon anode is electrochemical hydrogen storage. The cathode made of potassium nickel hexacyanoferrate exhibits both an ultrahigh capacity of 232.7 mAh g <superscript>-1</superscript> under 100 mA g <superscript>-1</superscript> and a consistent performance of 214 mAh g <superscript>-1</superscript> at 2000 mA g <superscript>-1</superscript> (with a capacity retention of 92.8% after 200 cycles). The mesoporous carbon sheet anode exhibits a capacity of 87.6 mAh·g <superscript>-1</superscript> at 100 mA g <superscript>-1</superscript> with a good rate and cyclic performance. The full cell provides an operational voltage of 1.55 V, a capacity of 93.6 mAh g <superscript>-1</superscript> at 100 mA g <superscript>-1</superscript> , and 82.4% capacity retention after 1000 cycles at 2000 mA g <superscript>-1</superscript> along with a low self-discharge rate. The investigation and discussion about the energy storage mechanisms for both electrode materials are also provided.
Details
- Language :
- English
- ISSN :
- 1944-8252
- Database :
- MEDLINE
- Journal :
- ACS applied materials & interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 38597319
- Full Text :
- https://doi.org/10.1021/acsami.4c01499