Journal
ENERGY TECHNOLOGY
Volume 7, Issue 8, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201801160
Keywords
Co-0; 5Ni(0); 5MoO(4); double-shelled hollow spheres; lithium-ion batteries; spray-drying; supercapacitors
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Funding
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- National Natural Science Foundation of China [51521001, 21673171, 51502226]
- National Key R&D Program of China [2016YFA0202603]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- Yellow Crane Talent (Science & Technology) Program of Wuhan City
- Fundamental Research Funds for the Central Universities [WUT: 2018III014]
- National Basic Research Program of China [2013CB934103]
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Transition metal molybdates represent a promising family of electrode materials for supercapacitors and lithium-ion batteries (LIBs). Herein, Co0.5Ni0.5MoO4 double-shelled hollow spheres (DSHSs) are synthesized using a simple and scalable spray-drying method followed by calcination in air. Benefited from the unique hollow structure as well as the coexistence of Co and Ni, the as-synthesized Co0.5Ni0.5MoO4 DSHSs exhibit an improved pseudocapacitive property with a specific capacitance of 731 F g(-1) at 0.5 A g(-1) and a high capacitance retention of 91% (10 A g(-1)) after 5000 cycles. In addition, the obtained Co0.5Ni0.5MoO4 DSHSs also manifest a high specific capacity (900 mAh g(-1) at 0.2 A g(-1) after 50 cycles) and an excellent cyclability (756 mAh g(-1) at 1 A g(-1) after 1000 cycles) for lithium storage. This rational design on both component and structure provides an effective strategy to achieve high-performance supercapacitors and LIBs.
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