期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 35, 页码 29496-29504出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b08455
关键词
self-templating synthesis; hybrid supercapacitors; cobalt hexacyanoferrate; hollow structures; prussian blue analogues
资金
- National Natural Science Foundation of China [51432008, 51521061]
- Natural Science Foundation of Shaanxi Province [2018JM5044]
- Program of Introducing Talents of Discipline to Universities [B08040]
- Research Fund of the State Key Laboratory of Solidification Processing [142-TZ-2016]
Prussian blue (PB) and its analogues (PBA), especially with hollow structures, have attracted growing attention from the researchers of energy storage field. Herein, we have developed a facile self-templating method to synthesize hollow-structured cobalt hexacyanoferrate (CoHCF) with controllable morphologies by using water-soluble precursors as templates. The method is versatile and can be extended to synthesize various PB/PBA hollow structures with tunable composition and morphology. Profiting from the unique hollow structure, the CoHCF hollow prisms manifest exceptional electrochemical performance in the Na2SO4 aqueous electrolyte, including a high specific capacitance (284 F g(-1) at 1 A g(-1)), a high rate capability, and an excellent cycling stability (92% retention after 5000 cycles). A hybrid supercapacitor device assembled with the CoHCF hollow prisms and activated carbon shows a high specific density of 47 W h kg(-1) at a specific power of 1000 W kg(-1) and stable cycling performance.
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