期刊
NATURE COMMUNICATIONS
卷 8, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/ncomms14264
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资金
- National Key Research and Development Program of China [2016YFA0202603]
- National Basic Research Program of China [2013CB934103]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- National Natural Science Foundation of China [51521001, 51502226, 21673171]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- Fundamental Research Funds for the Central Universities [WUT: 2015-YB-002, 2016III001, 2016III002]
- Students Innovation and Entrepreneurship Training Program [20151049701006]
- Monash Centre for Atomically Thin Materials
Carbon materials are generally preferred as anodes in supercapacitors; however, their low capacitance limits the attained energy density of supercapacitor devices with aqueous electrolytes. Here, we report a low-crystalline iron oxide hydroxide nanoparticle anode with comprehensive electrochemical performance at a wide potential window. The iron oxide hydroxide nanoparticles present capacitances of 1,066 and 716 Fg(-1) at mass loadings of 1.6 and 9.1 mgcm(-2), respectively, a rate capability with 74.6% of capacitance retention at 30Ag(-1), and cycling stability retaining 91% of capacitance after 10,000 cycles. The performance is attributed to a dominant capacitive charge-storage mechanism. An aqueous hybrid supercapacitor based on the iron oxide hydroxide anode shows stability during float voltage test for 450 h and an energy density of 104Whkg(-)1 at a power density of 1.27kWkg(-1). A packaged device delivers gravimetric and volumetric energy densities of 33.14Whkg(-1) and 17.24Whl(-1), respectively.
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