Defect-free soft carbon as cathode material for Al-ion batteries
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Al-ion batteries are proposed as promising energy storage candidates for beyond Li-ion technology due to the higher natural earth of Al metal. Recently, various graphite and graphene cathodes for Al-ion batteries have been studied in this regard, but their costs are not satisfactory. In this study, a novel cathode for Al-ion batteries is prepared by graphitizing inexpensive soft carbon materials (mesocarbon microspheres and petroleum coke) at 2800 °C. The charge and discharge process is showcased here for graphitized petroleum coke, which has a storage capacity of 77.7 mAh g−1 with two high discharge voltage (~ 2.25 and 1.80 V), higher than graphitized mesocarbon microspheres (51 mAh g−1). It also has excellent cycle stability and no reduction in specific capacity after 1000 cycles. Affordable cost of the graphitized petroleum coke cathode makes Al-ion battery more promising for large-scale chemical energy storage.
KeywordsAl-ion battery Defect-free Cathode Petroleum coke
This work was supported by Jiangsu University (grant number 5501670001).
- 30.Yu X, Wang B, Gong D, Xu Z, Lu B (2017) Graphene nanoribbons on highly porous 3D graphene for high-capacity and ultrastable Al-ion batteries. Adv Mater 29(4). https://doi.org/10.1002/adma.201604118