LITHIUM ION SECONDARY BATTERY

WIPO Patent Application WO/2013/180083

A1

The present invention is a secondary battery which comprises a negative electrode that has been subjected to a lithium predoping treatment. This secondary battery is characterized by being produced through: a step for forming a negative electrode that comprises a negative electrode active material containing at least a metal (a) which is alloyable with lithium, a binder for negative electrodes, and a negative electrode collector (a negative electrode formation step); and a step for forming an electrode element that comprises the negative electrode, which has been formed by the negative electrode formation step, a positive electrode and a separator such that the positive electrode and the negative electrode are arranged so as to face each other (an electrode element formation step). This secondary battery is also characterized in that the lithium predoping treatment is carried out by bringing the negative electrode into contact with a lithium source in at least two periods that are selected from the group consisting of (period i) the period before the negative electrode formation step, (period ii) the period after the negative electrode formation step but before the electrode element formation step, (period iii) the period during the electrode element formation step, and (period iv) the period after the electrode element formation step.

KAWASAKI DAISUKE (JP)
SERIZAWA SHIN (JP)
FUJII EMIKO (JP)

PCT/JP2013/064681

December 05, 2013

May 27, 2013

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NEC CORP (JP)

H01M10/058; H01M2/02; H01M4/139; H01M4/1393; H01M4/1395; H01M4/36; H01M4/38; H01M4/48; H01M4/485; H01M4/587; H01M4/62; H01M10/052; H01M10/0585

JP2007214109A	2007-08-23
JP2005353575A	2005-12-22
JP2008300214A	2008-12-11
JP2011222153A	2011-11-04

ITO, Katsuhiro et al. (JP)
Katsuhiro Ito (JP)

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