期刊
BATTERIES-BASEL
卷 8, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/batteries8100181
关键词
sodium-ion battery; electrode structure; Na; 0 44MnO2; one-pot spraying construction; open-pores networking structure
资金
- Engineering and Physical Sciences Research Council (EPSRC) UKRI Innovation Fellowship [EP/S001239/1, EP/S001239/2]
- Faraday Industry Fellowship [FIIF015]
- Faraday Institution Training Grant [FITG034]
- Imperial College London UKRI Impact Acceleration Account [EP/X52556X/1]
In this study, a new route of one-pot spray engineering was used to design Na0.44MnO2 cathodes, resulting in high-rate and cycle-stable performance for Na-ion batteries. The adjustment of electrode structure from dense to open sponge-like morphology improves ion insertion and transport kinetics, increasing the rate capability and cycling retention.
To improve the practical performance of Na-ion batteries, electrode structure engineering provides a new route to improve the electrochemical efficiency of the cathode active material. In this study, we suggest a new route of one-pot spray engineering to design Na0.44MnO2 cathodes to realize high-rate and cycle-stable Na-ion battery performance. This technique adjusts the electrode structure from a dense to an open sponge-like morphology during layer-by-layer deposition of the materials. The sponge-like cathode results in improved ion insertion and transport kinetics, thus accelerating the rate capability with increased capacity and high-rate cycling capability (100.1 mAh/g and 90.2% cycling retention after 100 cycles at 5 C). These results highlight the potential for design engineering of cathode structures to achieve high-rate and cycle-stable performance for Na-ion batteries.
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