期刊
CARBON
卷 191, 期 -, 页码 195-204出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2022.01.063
关键词
Non-aqueous aluminum-ion batteries; Activated carbon; Mesoporous carbon; Defective carbon; Coconut shell chars
资金
- Development and Promotion of Science and Technology Project (DPST) scholarship, Thailand
- Institute of Nanomaterials Research and Inno-vation for Energy (IN-RIE)
- Khon Kaen University, Thailand
Aluminium-ion batteries (AIBs) are a promising alternative to traditional rechargeable battery types, with activated carbon derived from coconut shell chars showing great potential as a cathode material. The study demonstrates that the mesoporosity and defect structures in this low-cost carbon material allow good storage capability for large anion species. This research emphasizes the importance of the porous and defective structures in carbon materials for storing large ion species.
Most commercial rechargeable battery types suffer from several drawbacks, including high cost, toxic and hazardous materials, poor performance and general non-sustainability. Aluminium-ion batteries (AIBs), with aluminium as the most common metal in the Earth's crust, can theoretically overcome almost all these shortcomings. However, the intercalation of large-sized chloroaluminate (AlCl4-) active ions into a host cathode, such as graphite, leads to poor capacity with volume expansion restricting practical applications. Finding a suitable cathode material for such large anions is a great challenge. We demonstrate a highly porous activated carbon derived from coconut shell chars as a promising cathode material. Activated carbon possesses a high mesoporosity and defect concentration with a specific area of 2686 m(2) g(-1). Its high surface area along with a great degree of mesoporosity and defects, activated carbon provides sufficient space and efficient transport channels for these active ions. Activated carbon cathodes show a specific discharge capacity of 150 mAh g(-1) at 0.1 A g(-1) with a good rate capability and cycling stability over 1500 cycles at 1 A g(-1). This work illustrates that the mesoporosity and defect structures in this low-cost carbon material allow good AlCl4- anion storage capability, which supports the design principles for electrode materials storing large ion species. (C) 2022 Elsevier Ltd. All rights reserved.
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