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Manganese-doped cobalt zeolitic imidazolate framework with highly enhanced performance for supercapacitor
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DOI：10.1016/j.est.2019.101018.png)
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Abstract
En 中文
The rational design of the heteroatom-doped ZIF-67 provides a good opportunity to optimize the performance of the MOF-based supercapacitor. In this work, a simple method was proposed to fabricate a well-formed Co/MnZIF cube by a one-step coprecipitation method. The surface area and conductivity of the as-prepared sample were greatly improved beneficial from the presence of manganese ions. When used in supercapacitor testing, Co/ Mn-ZIF-based positive electrode exhibited an ultra-high specific capacitance of 926.25 F g(-1) at 0.5 A g(-1) and good cycling stability with 64.1% of initial capacitance remained after 1500 charge-discharge cyclic testing. Attractive specific energy of 52.95 Wh kg(-1) at 1080 W kg(-1) was achieved and 26.4 Wh kg(-1) at remarkable 43.2 kW kg(-1) was accomplished from the asymmetric supercapacitor in terms of Co/Mn-ZIF and activated carbon.
Keywords:
Zeolitic imidazolate framework
Manganese-doped
Coprecipitation
Supercapacitor
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