| abstract |
The present invention relates to providing a negative electrode and a secondary battery capable of improving charge and discharge efficiency. A negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector, and the negative electrode active material layer has a plurality of negative electrode active material particles including at least one of a single element or a compound of silicon or tin, A secondary battery comprising the negative electrode, and the negative electrode, wherein at least part of the surface has a film containing an oxo acid salt (such as lithium borate or lithium silicate). |