TY - GEN
T1 - Electrochemical degradation caused by mechanical damage in silicon negative electrodes
AU - Yoshida, N.
AU - Sakamoto, T.
AU - Kuwata, Naoaki
AU - Kawamura, J.
AU - Sato, K.
AU - Hashida, T.
N1 - Publisher Copyright:
© The Electrochemical Society.
PY - 2016
Y1 - 2016
N2 - Silicon is a promising anode material for lithium ion batteries application due to its high electrochemical capacity. Unfortunately, silicon undergoes a volume expansion of 300∼400% under the full lithiation condition and suffers from severe capacity fade, which limits its successful application in commercial cells. In this study, we used in situ acoustic emission method for detecting mechanical damage in the silicon electrode. The present study revealed the mechanism of degradation in a silicon electrode of the lithium ion batteries. It was shown that the long-term performance of silicon electrode was dictated by its spallation during the discharge processes. This study demonstrated that the AE method developed was a powerful tool to examine the mechanical damage and electrochemical degradation in lithium ion battery electrodes.
AB - Silicon is a promising anode material for lithium ion batteries application due to its high electrochemical capacity. Unfortunately, silicon undergoes a volume expansion of 300∼400% under the full lithiation condition and suffers from severe capacity fade, which limits its successful application in commercial cells. In this study, we used in situ acoustic emission method for detecting mechanical damage in the silicon electrode. The present study revealed the mechanism of degradation in a silicon electrode of the lithium ion batteries. It was shown that the long-term performance of silicon electrode was dictated by its spallation during the discharge processes. This study demonstrated that the AE method developed was a powerful tool to examine the mechanical damage and electrochemical degradation in lithium ion battery electrodes.
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U2 - 10.1149/07520.0031ecst
DO - 10.1149/07520.0031ecst
M3 - Conference contribution
AN - SCOPUS:85025130121
T3 - ECS Transactions
SP - 31
EP - 37
BT - Li-Ion Batteries
A2 - Johnson, Christopher
A2 - Cui, Y.
A2 - Zhang, Y.
A2 - Koenig, G.
A2 - Kostecki, R.
A2 - Guyomard, D.
A2 - Winter, M.
A2 - Fukunaka, Y.
PB - Electrochemical Society Inc.
T2 - Li-Ion Batteries A03 Battery Symposium - PRiME 2016/230th ECS Meeting
Y2 - 2 October 2016 through 7 October 2016
ER -
