Mn-Rich NMC Cathode for Lithium-Ion Batteries at High-Voltage Operation

Arjun Kumar Thapa (), Brandon W. Lavery, Ram K. Hona, Nawraj Sapkota, Milinda Kalutara Koralalage, Ayodeji Adeniran, Babajide Patrick Ajayi, Muhammad Akram Zain, Hui Wang, Thad Druffel, Jacek B. Jasinski, Gamini U. Sumanasekera, Mahendra K. Sunkara and Masaki Yoshio
Additional contact information
Arjun Kumar Thapa: Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Brandon W. Lavery: Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Ram K. Hona: Department of Chemistry, University of Louisville, Louisville, KY 40292, USA
Nawraj Sapkota: Department of Physics & Astronomy, University of Louisville, Louisville, KY 40292, USA
Milinda Kalutara Koralalage: Department of Physics & Astronomy, University of Louisville, Louisville, KY 40292, USA
Ayodeji Adeniran: Department of Mechanical Engineering, University of Louisville, Louisville, KY 40292, USA
Babajide Patrick Ajayi: Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Muhammad Akram Zain: Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Hui Wang: Department of Mechanical Engineering, University of Louisville, Louisville, KY 40292, USA
Thad Druffel: Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Jacek B. Jasinski: Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Gamini U. Sumanasekera: Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Mahendra K. Sunkara: Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Masaki Yoshio: Advance Research Center, Saga University, Yoga-Machi, Saga 840-0047, Japan

Energies, 2022, vol. 15, issue 22, 1-14

Abstract: Development in high-rate electrode materials capable of storing vast amounts of charge in a short duration to decrease charging time and increase power in lithium-ion batteries is an important challenge to address. Here, we introduce a synthesis strategy with a series of composition-controlled NMC cathodes, including LiNi 0.2 Mn 0.6 Co 0.2 O 2 (NMC262), LiNi 0.3 Mn 0.5 Co 0.2 O 2 (NMC352), and LiNi 0.4 Mn 0.4 Co 0.2 O 2 (NMC442). A very high-rate performance was achieved for Mn-rich LiNi 0.2 Mn 0.6 Co 0.2 O 2 (NMC262). It has a very high initial discharge capacity of 285 mAh g −1 when charged to 4.7 V at a current of 20 mA g −1 and retains the capacity of 201 mAh g −1 after 100 cycles. It also exhibits an excellent rate capability of 138, and 114 mAh g −1 even at rates of 10 and 15 C (1 C = 240 mA g −1 ). The high discharge capacities and excellent rate capabilities of Mn-rich LiNi 0.2 Mn 0.6 Co 0.2 O 2 cathodes could be ascribed to their structural stability, controlled particle size, high surface area, and suppressed phase transformation from layered to spinel phases, due to low cation mixing and the higher oxidation state of manganese. The cathodic and anodic diffusion coefficient of the NMC262 electrode was determined to be around 4.76 × 10 −10 cm 2 s −1 and 2.1 × 10 −10 cm 2 s −1 , respectively.

Keywords: Mn-rich NMC cathode; high voltage; Li-ion battery; Li + diffusion coefficient; cyclic voltammetry; electrochemical impedance spectroscopy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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