| 摘要 |
A non-aqueous electrolyte secondary battery of the present disclosure includes: a positive electrode containing a first and a second positive electrode active material; and a non-aqueous electrolyte containing a fluorinated chain carboxylic acid ester represented by the following structural formula 1. The first positive electrode active material includes a lithium-containing transition metal oxide represented by a Li2MnO3—LiMO2 solid solution, and the second positive electrode active material includes a lithium-containing transition metal oxide which contains at least Ni, has a Ni rate of 50 percent by mole or more to the total moles of metal elements other than Li, and has a layered structure.;(R represents an alkyl group having 1 to 4 carbon atoms, and X's each independently represent F, H, an alkyl group having 1 to 4 carbon atoms, or a group obtained by substituting at least one H of the above alkyl group by F.) |
| 主权项 |
1. A non-aqueous electrolyte secondary battery comprising:
a positive electrode containing:
a first positive electrode material that contains a lithium-containing transition metal oxide in the form of a Li2MnO3—LiMO2 solid solution (M represents at least one selected from Ni, Co, Fe, Al, Mg, Ti, Sn, Zr, Nb, Mo, W, and Bi), anda second positive electrode material that contains a lithium-containing transition metal oxide including at least Ni, the lithium-containing transition metal oxide having a Ni rate of 50 percent by mole or more with respect to the total moles of metal elements other than Li, and the lithium-containing transition metal oxide having a layered structure; and a non-aqueous electrolyte containing a fluorinated chain carboxylic acid ester represented by the following structural formula 1: (R represents an alkyl group having 1 to 4 carbon atoms, and X's each independently represent F, H, an alkyl group having 1 to 4 carbon atoms, or a group in which at least one hydrogen atom of the alkyl group is substituted by a fluorine atom). |
