A secondary battery includes a positive electrode and a negative electrode. The negative electrode includes first particles (21) made of metal and second particles (22) made of a silicon containing substance. The first particles (21) are in contact with th...

A positive electrode active material according to the present invention includes: center cores (51) containing a composite oxide containing alkali metal or alkali earth metal; and eutectic layers (52) containing a eutectic substance composed of at least tw...

A secondary battery (100) according to the present invention includes a first electrode (10), a second electrode (20), an ion transmission member (30) in contact with the first electrode (10) and the second electrode (20), and a hole transmission member (4...

A secondary battery includes a positive electrode and a negative electrode. The negative electrode includes a layered material (21) with an interlayer distance of 10 nm to 500 nm and interlayer particles (22, 23) with a diameter of smaller than 1 µm arran...

A secondary battery (100) includes: a negative electrode (20); a positive electrode (10) containing a p-type semiconductor material; and an isolation layer (30) configured to isolate the negative electrode (20) from the positive electrode (10) and includin...