TY - JOUR
T1 - Influence of Atmosphere on Electrochemical Performance of LiNi0.8Co0.1Mn0.1O2 Electrodes for Li-Ion Batteries
AU - Wang, Ran
AU - Wang, Jing
AU - Chen, Shi
AU - Gao, Ang
AU - Su, Yuefeng
AU - Wu, Feng
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/2/15
Y1 - 2018/2/15
N2 - Ni-rich layered materials have been regarded as competitive candidates for advanced lithium-ion batteries due to their high energy density, relatively low cost and environmentally-friendly nature. However, they suffer from serious degradation of cycling performance after exposing to air during their storage. Here we selected LiNi0.8Co0.1Mn0.1O2 as a typical Ni-rich positive material to study the influence upon exposure to ambient air on surface chemical composition and electrochemical performance. TEM confirms the existence of amorphous surface layer after contacting with atmosphere and the thickness is about 3-4 nm. The fresh LiNi0.8Co0.1Mn0.1O2 sample has capacity retention of 94.6% and 93.3% after 50 cycles at 0.2C and 1C, respectively, comparing to the 91.7% and 82.4% of the exposed sample. The charge-discharge curves and electrochemical impedance spectra indicate that exposure to air lead to increased impedance and polarization, which seriously affects LiNi0.8Co0.1Mn0.1O2 cycling properties. So, it is very important for Ni-rich cathode materials without contacting with atmosphere directly.
AB - Ni-rich layered materials have been regarded as competitive candidates for advanced lithium-ion batteries due to their high energy density, relatively low cost and environmentally-friendly nature. However, they suffer from serious degradation of cycling performance after exposing to air during their storage. Here we selected LiNi0.8Co0.1Mn0.1O2 as a typical Ni-rich positive material to study the influence upon exposure to ambient air on surface chemical composition and electrochemical performance. TEM confirms the existence of amorphous surface layer after contacting with atmosphere and the thickness is about 3-4 nm. The fresh LiNi0.8Co0.1Mn0.1O2 sample has capacity retention of 94.6% and 93.3% after 50 cycles at 0.2C and 1C, respectively, comparing to the 91.7% and 82.4% of the exposed sample. The charge-discharge curves and electrochemical impedance spectra indicate that exposure to air lead to increased impedance and polarization, which seriously affects LiNi0.8Co0.1Mn0.1O2 cycling properties. So, it is very important for Ni-rich cathode materials without contacting with atmosphere directly.
UR - http://www.scopus.com/inward/record.url?scp=85045264572&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/301/1/012039
DO - 10.1088/1757-899X/301/1/012039
M3 - Conference article
AN - SCOPUS:85045264572
SN - 1757-8981
VL - 301
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012039
T2 - 5th Annual International Conference on Material Science and Environmental Engineering, MSEE 2017
Y2 - 15 December 2017 through 17 December 2017
ER -