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Superior performance high-entropy perovskite metal fluoride electrodes derived from spent LiNi 1/3 Co 1/3 Mn 1/3 O 2 /graphite lithium-ion batteries

Materials Letters, ISSN: 0167-577X, Vol: 370, Page: 136784
2024
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Inspired by high-entropy materials with near-equal molar ratios, we have developed a streamlined and scalable method to synthesize a high-entropy perovskite fluoride electrode material, K 0.65 Li 0.07 Mg 0.19 Mn 0.17 Co 0.16 Ni 0.17 Cu 0.24 F 2.70 (KLMF). KLMF is synthesized via a direct liquid-phase method, which employs spent LiNi 1/3 Co 1/3 Mn 1/3 O 2 /graphite (NCM111/G) lithium-ion batteries (LIBs) as the fundamental reactants. After 500 cycles at a current density of 2 A/g, KLMF demonstrates a specific capacity that ranges from 1043.1 − 477.95 mAh/g when tested at current densities from 0.1 − 6.4 A/g. Moreover, KLMF maintains robust performance in a full-cell configuration, underscoring its significant potential for practical applications.

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