期刊
CHINESE JOURNAL OF POLYMER SCIENCE
卷 38, 期 5, 页码 514-521出版社
SPRINGER
DOI: 10.1007/s10118-020-2353-6
关键词
MnO2; Polyaniline; Composite aerogels; Aqueous zinc-ion batteries; Galvanostatic intermittent titration techniques
资金
- National Natural Science Foundation of China [51602284, 51702286]
- Natural Science Foundation of Zhejiang Province, China [LQ17B030002, LR19E020003]
- General Scientific Research Project of the Department of Education of Zhejiang Province, China [Y201839638]
Aqueous zinc-ion batteries, especially Zn-MnO2 battery, have attracted intensive attention owing to their unique features of high capacity, environmental friendliness, and safety. However, the problem of Mn dissolution hinders the development of zinc-ion batteries with long-term usage and high-rate performance. In this work, a novel preparation method for the polyaniline (PANI)-coated composite aerogel of MnO2 and rGO (MnO2/rGO/PANI) electrode is reported. The obtained composite possesses high electrical conductivity, and also effectively suppresses the dissolution of Mn. The fabricated MnO2/rGO/PANI//Zn battery exhibits a high capacity of 241.1 mAh center dot g(-1) at 0.1 A center dot g(-1), and an excellent capacity retention of 82.7% after 600 charge/discharge cycles. In addition, the rapid diffusion coefficient of the MnO2/rGO/PANI electrode was further examined by galvanostatic intermittent titration technique. This work provides new insights into the development of high-performance Zn-MnO2 battery with a better understanding of its diffusion kinetics.
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