Hao Z, Shi X, Zhu W, Zhang X, Yang Z, Li L, Hu Z, Zhao Q, Chou S. Bismuth Nanoparticle Embedded in Carbon Skeleton as Anode for High Power Density Potassium-Ion Batteries.
Chem Sci 2022;
13:11376-11381. [PMID:
36320573 PMCID:
PMC9533415 DOI:
10.1039/d2sc04217g]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 08/22/2022] [Indexed: 11/30/2022] Open
Abstract
Bismuth is a promising anode for potassium-ion batteries (PIBs) due to its suitable redox potential, large theoretical capacity, and superior electronic conductivity. Herein, we report a Bi@C (Bi nanoparticles uniformly embedded in a carbon skeleton) composite anode which delivers a superior rate performance of 244.3 mA h g−1 at 10.0 A g−1 and a reversible capacity of 255.6 mA h g−1 after 200 cycles in an optimized ether-based electrolyte. The outstanding electrochemical performance results from its robust structural design with fast reaction kinetics, which are confirmed by both experimental characterization studies and first-principles calculations. The reversible potassium storage mechanism of the Bi@C composite was also investigated by in situ X-ray diffraction. In addition, the full PIB cell assembled with a Bi@C composite anode and nickel-based Prussian blue analogue cathode exhibits high discharge voltage (3.18 V), remarkable power density (>10 kW kg−1), and an excellent capacity retention of 87.8% after 100 cycles. The results demonstrate that the PIBs with Bi anodes are promising candidates for power-type energy storage devices.
An ultrahigh power density (>10 kW kg−1) potassium-ion full cell was fabricated by using a designed Bi@C composite as the anode. This workproves that potassium-ion batteries are promising candidates for power-type large-scale energy storage devices.![]()
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