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Graphitic, Porous, and Multiheteroatom Codoped Carbon Microtubes Made from Hair Waste: A Superb and Sustained Anode Substitute for Li-Ion Batteries

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journal contribution
posted on 19.10.2018, 00:00 by Jianhui Zhu, Siyuan Liu, Yani Liu, Ting Meng, Lai Ma, Han Zhang, Minquan Kuang, Jian Jiang
Turning household wastes into useful battery anodes is always a rational way to retard the graphite resources exhaustion and prevent deterioration of the living environment. Although great efforts have been devoted, nearly all evolved carbons are intrinsically amorphous and dense, which is adverse to ions diffusions, electrons transfer, and actives utilization for battery usage. Herein, by selecting common hair waste as the example material, we propose a smart catalytic engineering protocol to make graphitic, porous, and multiheteroatom co-doped carbon microtube anodes for sustained Li-ion batteries. The Ni-based nanofilm matrix evenly immobilized on all hair surface plays a key role in the rapid graphitization of hair and the formation of deep pores. Such evolved carbons with unique functionalized properties can well make up for the shortcomings of hair-carbonized products, exhibiting far superior anodic behaviors on reversible capacity/actives utilization efficiency, cyclic stability/endurance (no capacity fading in 1000 cycles), and rate capabilities. The full cell testing furthermore justifies their great potential usage in Li-ion batteries. This paradigm work may bring new opportunities to recycle and evolve the vast biomass waste to advanced anode substitutes for energy-storage applications.