A negative electrode comprising: a negative electrode current collector; and a negative electrode active material layer on the negative electrode current collector; the negative electrode active material layer including a negative electrode active material containing a negative electrode active material particle; the negative electrode active material particle comprising: a silicon compound particle containing a silicon compound that contains an oxygen, wherein the silicon compound particle contains a Li compound and the negative electrode active material particle has a surface layer portion containing a carbon material; and the negative electrode active material particle including: aluminum phosphorous composite oxide attached to at least part of the surface, wherein the aluminum phosphorous composite oxide is a composite of P 2 O 5 and Al 2 O 3, and the P 2 O 5 and the Al 2 O 3 in the aluminum phosphorous composite oxide are in a mass ratio in a range of 1.2 < mass of the P 2 O 5 /mass of the Al 2 O 3 < 3.0, wherein the negative electrode active material particle including aluminum phosphorous composite oxide has at least one peak in a region of a binding energy of more than 135 eV and 144 eV or less in a P 2p peak shape given in an X-ray photoelectron spectroscopy measured according to the method defined in the description. a negative electrode current collector; and a negative electrode active material layer on the negative electrode current collector; the negative electrode active material layer including a negative electrode active material containing a negative electrode active material particle; the negative electrode active material particle comprising: a silicon compound particle containing a silicon compound that contains an oxygen, wherein the silicon compound particle contains a Li compound and the negative electrode active material particle has a surface layer portion containing a carbon material; and a silicon compound particle containing a silicon compound that contains an oxygen, wherein the silicon compound particle contains a Li compound and the negative electrode active material particle has a surface layer portion containing a carbon material; and the negative electrode active material particle including: aluminum phosphorous composite oxide attached to at least part of the surface, wherein the aluminum phosphorous composite oxide is a composite of P 2 O 5 and Al 2 O 3, and the P 2 O 5 and the Al 2 O 3 in the aluminum phosphorous composite oxide are in a mass ratio in a range of 1.2 < mass of the P 2 O 5 /mass of the Al 2 O 3 < 3.0, aluminum phosphorous composite oxide attached to at least part of the surface, wherein the aluminum phosphorous composite oxide is a composite of P 2 O 5 and Al 2 O 3, and the P 2 O 5 and the Al 2 O 3 in the aluminum phosphorous composite oxide are in a mass ratio in a range of 1.2 < mass of the P 2 O 5 /mass of the Al 2 O 3 < 3.0, wherein the negative electrode active material particle including aluminum phosphorous composite oxide has at least one peak in a region of a binding energy of more than 135 eV and 144 eV or less in a P 2p peak shape given in an X-ray photoelectron spectroscopy measured according to the method defined in the description.