Electrochemical Performance of Layer-Structured Ni0.8Co0.1Mn0.1O2 Cathode Active Materials Synthesized by Carbonate Co-Precipitation

Byung Hyun Park; Taeseong Kim; Hyerim Park; Youngku Sohn; Jongmin Shin; Misook Kang

doi:10.3390/nano12203610

Electrochemical Performance of Layer-Structured Ni_0.8Co_0.1Mn_0.1O₂ Cathode Active Materials Synthesized by Carbonate Co-Precipitation

Nanomaterials (Basel). 2022 Oct 14;12(20):3610. doi: 10.3390/nano12203610.

Authors

Byung Hyun Park¹, Taeseong Kim¹, Hyerim Park¹, Youngku Sohn², Jongmin Shin¹, Misook Kang¹

Affiliations

¹ Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan 38541, Korea.
² Department of Chemistry, Chungnam National University, Daejeon 34134, Korea.

Abstract

The layered Ni-rich NiCoMn (NCM)-based cathode active material Li[Ni_xCo_(1-x)/2Mn_(1-x)/2]O₂ (x ≥ 0.6) has the advantages of high energy density and price competitiveness over an LiCoO₂-based material. Additionally, NCM is beneficial in terms of its increasing reversible discharge capacity with the increase in Ni content; however, stable electrochemical performance has not been readily achieved because of the cation mixing that occurs during its synthesis. In this study, various layer-structured Li_1.0[Ni_0.8Co_0.1Mn_0.1]O₂ materials were synthesized, and their electrochemical performances were investigated. A NiCoMnCO₃ precursor, prepared using carbonate co-precipitation with Li₂CO₃ as the lithium source and having a sintering temperature of 850 °C, sintering time of 25 h, and metal to Li molar ratio of 1.00-1.05 were found to be the optimal parameters/conditions for the preparation of Li_1.0[Ni_0.8Co_0.1Mn_0.1]O₂. The material exhibited a discharge capacity of 160 mAhg^-1 and capacity recovery rate of 95.56% (from a 5.0-0.1 C-rate).

Keywords: carbonate co-precipitation; cathode active material; layered Ni-rich NCM.

Grants and funding

221A380019/Yeungnam University