Influence of Aging Process on the Crystalline Structure and Electrochemical Properties of LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Material

Abstract:

Ni_0.8Co_0.1Mn_0.1(OH)₂ precursors prepared by co-precipitation method were served to synthesize LiNi_0.8Co_0.1Mn_0.10₂ cathode materials by sintering with LiOH·H₂O at high temperature. It is shown from XRD analysis and electrochemical measurements that these precursors synthesized at different aging time are all composed of two phases, α-Ni (OH)₂ and β-Ni (OH)₂.With aging process lasting longer,relatively content of α-Ni (OH)₂ in precursors increase , peak intensity ratios of I₍₀₀₃₎/I₍₁₀₄₎ in LiNi_0.8Co_0.1Mn_0.10₂ get larger, the more complete of layer structure, the lower of Li⁺/Ni²⁺cation mixing. Results indicate that the existence and content increase of α-Ni (OH)₂ phase with aging process lasting can inhibit the cation mixing efficaciously. LiNi_0.8Co_0.1Mn_0.10₂ obtained from precursor aged 12h has a good cyclic performance, capacity retention rate reaches 92.8% after 30 cycles.

• Periodical: Advanced Materials Research (Volumes 912-914)
• Pages: 182-187
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.912-914.182
• Online since: April 2014
• Authors: Liang Bin Liu*, Lu Zheng, Jian Hua Wang, Yu Zhong Guo
• Keywords: Aging Time, Cathode Material, Cation Mixing, Co-Precipitation Processing, LiNi_0.8Co_0.1Mn_0.10₂

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