Journal
CHEMICAL ENGINEERING JOURNAL
Volume 354, Issue -, Pages 220-227Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.08.031
Keywords
High tap density; Manganese oxide; Carbon nanotube; Li-ion batteries; High performance
Categories
Funding
- National Natural Science Foundation of China [51772249, 51521061]
- Fundamental Research Funds for the Central Universities [G2017KY0308]
- National Natural Science Foundation of Shaanxi Province [2018JM5092]
- Hong Kong Scholars Program [XJ2017012]
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Electrode materials with high tap density are important for their practical application to achieve high volumetric energy density Li-ion batteries. In this work, large-scale fabrication of microsized carbon/MnOx/carbon nanotube composites by a low-cost spray-drying method is reported. The carbon/MnOx/carbon nanotube is characteristic of microspherical morphology consisting of interconnected carbon nanotubes and nano-MnOx with an exterior carbon coating. The micropacking enables the composite to exhibit a tap density as high as 2.54 g cm(-3). When evaluated as anode materials for Li-ion batteries, the high-tap-density carbon/MnOx/carbon nanotube electrode delivers a specific capacity of 927 mAh g(-1) after 100 cycles, corresponding to an ultrahigh volumetric capacity of 2355 mAh cm(-3). The carbon network also has dual-functions of excellent electrical conductivity and good mechanical elasticity for the MnOx to sustain superior rate and cycling properties. The scale-up production method provides a reliable practical avenue of fabricating high-tap-density metal-oxide materials for high-performance Li-ion batteries.
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