LITHIUM ION SECONDARY BATTERY AND A METHOD FOR PRODUCING THE SAME
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United States of America Patent
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Jun 1, 2017
app pub date -
Nov 21, 2016
filing date -
Nov 26, 2015
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Abstract
The stacked electrode body of the lithium ion secondary battery has an end surface parallel to the stacked direction of the positive electrode, the negative electrode and the separator. The end surface is opposed to the third electrode to dope Li ions into the negative electrode. (1) When the lithium ion secondary battery is discharged at a discharge current rate of 0.1 C to reach a voltage reaches 2.0V, a molar ratio (Li/M) of the Li and the metal M other than Li included in the positive electrode active material is 0.8 to 1.05, or (2) the third electrode includes a Li supply source arranged such that the Li supply source is opposed to the end surface of the stacked electrode body, and the negative electrode can be doped with Li ions supplied from the Li supply source when an electrical connection to the third electrode is provided.
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