Journal
ACS ENERGY LETTERS
Volume 2, Issue 7, Pages 1614-1620Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.7b00378
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Funding
- National Natural Science Foundation of China [51672078, 21473052]
- Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project [71675004]
- Hunan Youth Talents [2016RS3025]
- Foundation of State Key Laboratory of Coal Conversion [317-18-903]
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Potassium-based dual-ion full batteries (PDIBs) were developed with graphite anode, polytriphenylamine (PTPAn) cathode, and KPF6-based electrolyte. The PDIBs delivered a reversible capacity of 60 mA h g(-1) at a median discharge voltage of 3.23 V at 50 mA g(-1), with superior rate performance and long-term cycling stability over 500 cycles (capacity retention of 75.5%). Unlike the traditional dual-ion batteries, the operation mechanism of the PDIBs with PTPAn cathode is that the PF6 ions interacted with the nitrogen atom reversibly in the PTPAn cathode and the K+ ions were intercalated/deintercalated into/from the graphite anode during the charge/discharge process.
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