阴极
电池(电)
材料科学
锂离子电池
拉曼光谱
锂电池
离子
纳米技术
复合材料
化学
光学
物理化学
物理
功率(物理)
有机化学
量子力学
离子键合
作者
Stephany Pires da Silva,Lucas Evangelista Sita,Bernardo Gutiérrez,Fernando Henrique Pavoni,Henrique de Santana,Avacir Casanova Andrello,Paulo Rogério Catarini da Silva,Jair Scarmínio
标识
DOI:10.1016/j.matchemphys.2018.04.038
摘要
Technological and scientific efforts have been driven in order to clarify the changes in physical, chemical, and mechanical properties of lithium-ion battery components that lead to aging and failures in such batteries. Most of these studies have been carried out in laboratory scale and under accelerated battery aging processes. For a more realistic approach, cell phone batteries with low and high state of health (L and H SOH), discarded by their users were analyzed. LiCoO2 cathode material (L and H cathodes) showed properties deeply dependent on the battery SOH. Two hexagonal crystalline phases, expanded lattice and atomic disordering, were observed in the L cathode material by X-ray diffractometry and Raman spectroscopy measurements. Distinct infrared absorption profiles were observed for L and H cathode materials in the O-Co-O bending vibration region. Measurements of particle size distributions suggest a progressive fragmentation of LiCoO2 particles with the battery cycling. Additionally, mechanical deformations in the electrode's winding and in the battery case were observed for the lower SOH battery.
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