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- W4384156796 abstract "Huge active Li+ loss in the initial cycle owing to the formation of solid electrolyte interface (SEI) layer of anode restrict the enhancement of high-energy–density lithium-ion batteries (LIBs). Here, a method by reducing surface oxygen vacancies of lithium-rich manganese-based oxide (LRMO) to obtain huge number of irreversibly active Li+ for the application of cathode pre-lithiation, which is highly adaptive to electrode preparation process with excellent air stability, is proposed. Through modulating different lithium ratios, Li2-x(Mn2/3Ni1/3)xO2 (x = 0.67, LR-2) with fewer oxygen vacancies is synthesized. By simply adjusting cell voltage, it exhibits different electrochemical properties to match the requirements of different LIB cathode. When used as an agent to a LiFePO4 cathode, LR-2 can further enhance the capacity of cells, due to its “donor” lithium-ion capacity (244.1 mAh/g) and exceptional cyclic performance. By coupling with LiNi0.5Mn1.5O4, LR-2 provides high lithium compensation efficiency (320.0 mAh/g), while also releasing reversible capacities of 98.5 mAh/g, achieving a balance between pre-lithiation capacities and reversible discharge capacities. As a consequence, the LiNi0.5Mn1.5O4|graphite full cell containing LR-2 exhibits a reversible capacity of 123.3 mAh/g, 47% greater than the counterpart without LR-2, and significantly better cyclic performance. This study introduces a novel approach to design cathode pre-lithiation agent with Li-rich oxides for high-energy–density LIBs." @default.
- W4384156796 created "2023-07-14" @default.
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- W4384156796 date "2023-09-01" @default.
- W4384156796 modified "2023-10-16" @default.
- W4384156796 title "Overlithiation lithium-rich Mn-based oxide as cathode pre-lithiation agent towards high-energy-density batteries" @default.
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- W4384156796 doi "https://doi.org/10.1016/j.cej.2023.144744" @default.
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