Secondary battery, battery pack, vehicle, and stationary power supply
摘要
說明書
A secondary battery was obtained by a method similar to the method described in Example 1 except that a sodium-containing niobium titanium composite oxide LNT(Li2Na1.5Ti5.5Nb0.5O14) was used as a negative electrode active material in place of the lithium titanium oxide (Li4Ti5O12). The lithium ion insertion/extraction potential of the sodium niobium titanium composite oxide was 1.0 V (vs. Li/Li+) to 1.3 V (vs. Li/Li+).
First, a polyvinylidene fluoride resin having a weight-average molecular weight of 170,000 was dissolved in an organic solvent to prepare a solution. Next, the solution was applied on one surface of a cellulose nonwoven fabric, and the resulting coating was dried to form a PVdF resin film. Next, a separator was formed by a method similar to the method described in Comparative Example 3 except that a cellulose nonwoven fabric having the PVdF resin film formed thereon was used in place of the cellulose nonwoven fabric, and the cellulose nonwoven fabric and a solid electrolyte film were stacked such that the PVdF resin film and the solid electrolyte film were in contact with each other. The separator will be referred to as a separator SP11 hereinafter.
A secondary battery was obtained by a method similar to the method described in Example 1 except that the separator SP11 was used in place of the separator SP1.
<Evaluation Method>
(Microscopic ATR Method)
