Journal
ADVANCED SCIENCE
Volume 9, Issue 18, Pages -Publisher
WILEY
DOI: 10.1002/advs.202105882
Keywords
cathode materials; intercalation chemistry; layered oxides; phase transitions; potassium-ion batteries
Categories
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2021R1A4A200168711, 2017M1A2A2087577, 2019R1I1A3A01050978]
- Cheongju University
- National Research Foundation of Korea [2019R1I1A3A01050978] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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To meet future energy demands, it is necessary to find abundant and cost-effective alternatives to lithium-ion batteries. Potassium-ion batteries show promise as alternatives due to their abundance and similarities in intercalation chemistry and energy densities with lithium-ion batteries. Designing and developing efficient electrode materials is crucial for large-scale energy storage applications.
To meet future energy demands, currently, dominant lithium-ion batteries (LIBs) must be supported by abundant and cost-effective alternative battery materials. Potassium-ion batteries (KIBs) are promising alternatives to LIBs because KIB materials are abundant and because KIBs exhibit intercalation chemistry like LIBs and comparable energy densities. In pursuit of superior batteries, designing and developing highly efficient electrode materials are indispensable for meeting the requirements of large-scale energy storage applications. Despite using graphite anodes in KIBs instead of in sodium-ion batteries (NIBs), developing suitable KIB cathodes is extremely challenging and has attracted considerable research attention. Among the various cathode materials, layered metal oxides have attracted considerable interest owing to their tunable stoichiometry, high specific capacity, and structural stability. Therefore, the recent progress in layered metal-oxide cathodes is comprehensively reviewed for application to KIBs and the fundamental material design, classification, phase transitions, preparation techniques, and corresponding electrochemical performance of KIBs are presented. Furthermore, the challenges and opportunities associated with developing layered oxide cathode materials are presented for practical application to KIBs.
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