Abstract
Three-dimensional hierarchical carbon nanotube/acetylene black (CNT/AB) networks are fabricated by a simple mixing method to enhance electronic contact among LiMn2O4 particles in the rechargeable hybrid aqueous battery (ReHAB), an aqueous Zn/LiMn2O4 battery system. The hierarchical and long-range conductive pathways lead to fast electronic transfer in the CNT/AB/LiMn2O4 cathode, which contributes to the outstanding rate performance (specific discharge capacity of 105 mAh g−1 at 10 C). Besides, the stable composite structure contributes to the good cycling performance and high reversibility (Coulombic efficiency of almost 100 % over 300 charge-discharge cycles at 4 C). This hierarchical conductive network design is particularly useful for energy storage applications operated at high charge-discharge rate.
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Acknowledgments
This research was financially supported by Positec, the Natural Sciences and Engineering Research Council of Canada (NSERC), Canadian Foundation for Innovation (CFI), and the Canada Research Chairs (CRC) program. One of the authors (Xiao Zhu) thanks the China Scholarship Council for the Study Abroad Scholarship.
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Zhu, X., Doan, T.N.L., Yu, Y. et al. Enhancing rate performance of LiMn2O4 cathode in rechargeable hybrid aqueous battery by hierarchical carbon nanotube/acetylene black conductive pathways. Ionics 22, 71–76 (2016). https://doi.org/10.1007/s11581-015-1527-7
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DOI: https://doi.org/10.1007/s11581-015-1527-7