1. Cobalt Institute, (2017). Ores containing cobalt. 〈https://www.cobaltinstitute.org/ores-containing-cobalt.html〉. (Accessed by 2019).
2. Critical Mineral Resources of the United States-Economic and Environmental Geology and Prospects for Future Supply: Chapter F; U.S. Geological Survey: Reston, VA, (2017).
3. Challenges in the development of advanced li-ion batteries: a review;Etacheri;Energ. Environ. Sci.,2011
4. European Commission, (2017). Study on the review of the list of Critical Raw Materials − Executive summary. 〈http://ec.europa.eu/docsroom/documents/25421〉. (Accessed by 2019).
5. Potential environmental and human health impacts of rechargeable lithium batteries in electronic waste;Kang;Environ. Sci. Technol.,2013