期刊
INORGANIC CHEMISTRY
卷 58, 期 9, 页码 6410-6421出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.9b00627
关键词
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资金
- National Key Research and Development Program of China [2018YFC1901605]
- National Postdoctoral Program for Innovative Talents [BX201600192]
- Hunan Provincial Science and Technology Plan [2017TP1001, 2016TP1009]
- National Natural Science Foundation of China [51622406, 21673298, 21473258]
- Young Elite Scientists Sponsorship Program By CAST [2017QNRC001]
- Fundamental Research Funds for the Central Universities of Central South University [2018zzts368]
- Project of Innovation Driven Plan in Central South [2017CX004, 2018CX005]
Given its competitive theoretical capacity, Bi(2)MoO(6)( )is deemed as a promising anode material for the realization of efficient Li storage. Considering the severe capacity attenuation caused by the lithiation-induced expansion, it is essential to introduce effective modification. Remarkably, in this work, Bi2MoO6 microsphere with double-layered spherical shells are successfully prepared, and the polyaniline are coated on both inner and outer surfaces of double-layered spherical shells, working as buffer layers to strain the volume expansion during electrochemical cycling. Inspiringly, when utilized as anode in LIBs, the specific capacity of Bi2MoO6@PANI is maintained at 656.3 mAh g(-1) after 200 cycles at 100 mAg(-1), corresponding to a high capacity of 82%. However, the counterpart of individual Bi2MoO6 is only 36%. This result confirms that the polyaniline layer can dramatically promote stable cycling performances. Supported by in situ EIS and ex situ technologies followed by detailed analysis, the enhanced pseudocapacitance-dominated contributions and electron/ion transfer rate, benefiting from the combination with polyaniline, are further proved. This work confirms the significant effect of polyaniline on the ultrastable energy storage, further providing an in-depth sight on the impacts of polyaniline coating to the electrical conductivity as well as the resistances of electron/ion transport.
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