Microstructural, impedance and conductivity studies of magnesium doped lithium titanate materials for Li-ion batteries

Structural degradation is the main challenge of Nickel-rich cathodes, leading to capacity and voltage fading, especially at high cut-off voltages. Herein, LiNi 0.94-x Co 0.06 Mg x O 2 (x = 0, 0.01, 0.02) samples have been prepared by high-temperature solidstate reaction method. The effects of Mg doping on its crystalline structure, and electrochemical performance have been studied by various characterizations analysis. We notice that Mg doping can not only tighten the structure/interface stability of the cathode, but also accelerates the Li + diffusion, thereby significantly achieving its high voltage/cycle stability. High-voltage (4.5 V) electrochemical results show that Mgdoped LiNi 0.94 Co 0.06 O 2 (1 % Mg) can achieve a high reversible capacity of 217.5 mAh g À 1 at 0.2 C, high cycle retention rate of 80.5 % after 100 cycles at 0.2 C, inhibits average voltage decay, suppress resistance rise and boosted rate performance. Our work provides a solid strategy for improving the structure and voltage decay of nickel-rich cathode materials for future highenergy lithium-ion batteries.

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Effect of Magnesium Doping on Voltage Decay of Nickel‐Rich Cathode Materials

Khan

Zubair

Bibi

et al. 2021

ChemistrySelect

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Review on doping strategy in Li4Ti5O12 as an anode material for Lithium-ion batteries

Ezhyeh

Khodaei

Torabi

2023

Ceramics International

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Improving electrochemical properties of Li4Ti5O12/TiO2 diphase anode materials via Co-Cl co-doping

Zou

Gan

Song

et al. 2023

Journal of Alloys and Compounds

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Microstructural, impedance and conductivity studies of magnesium doped lithium titanate materials for Li-ion batteries

Cited by 4 publications

References 24 publications

Effect of Magnesium Doping on Voltage Decay of Nickel‐Rich Cathode Materials

Effect of Magnesium Doping on Voltage Decay of Nickel‐Rich Cathode Materials

Review on doping strategy in Li4Ti5O12 as an anode material for Lithium-ion batteries

Improving electrochemical properties of Li4Ti5O12/TiO2 diphase anode materials via Co-Cl co-doping

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