论文信息 - Surface changes on LiNi0.8Co0.2O2 particles during testing of high-power lithium-ion cells

Surface changes on LiNi0.8Co0.2O2 particles during testing of high-power lithium-ion cells

LiNi0.8Co0.2O2 particles from high-power lithium-ion cells were examined to determine material changes that result from accelerated aging tests. X-ray absorption spectroscopy (XAS) and transmission electron microscope (TEM) data indicated a LixNi1−xO-type layer on the particle surfaces. The greater thickness on particles from high-power fade cells indicate that these surface layers are a significant contributor to cathode impedance rise observed during cell tests.

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