Journal
ENERGY STORAGE MATERIALS
Volume 34, Issue -, Pages 250-259Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2020.09.020
Keywords
Lithium-ion batteries; Cobalt-free cathodes; Layered oxides; High-nickel oxides
Funding
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy [DEEE0008445]
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This article discusses the necessity and key factors for developing cobalt-free high-Ni layered oxides from the perspective of materials science and electrochemistry. Several aspects that need to be considered and the exploration of alternative dopants and substituents are proposed.
High-nickel layered oxides are enabling extraordinary growth of electric vehicles market due to its high energy density. Nonetheless, leading battery manufacturers are trying to cut down the manufacturing costs further by eliminating the dependency on cobalt in cathode materials. In this perspective, we explore several aspects that need to be considered to develop cobalt-free high-Ni layered oxides by reviewing the fundamental properties of LiNiO2. Furthermore, critical key factors for exploring alternative dopants and substituents are discussed for designing stable and inexpensive Co-free high-Ni layered oxides from a viewpoint of materials science and electrochemistry. Finally, a perspective on the future research direction on Co-free high-Ni layered oxides are highlighted with respect to practical considerations.
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