Negative electrode for metal secondary battery, metal secondary battery, and method of producing metal secondary battery

A negative electrode for a metal secondary battery, wherein,

• the negative electrode includes a carbon fiber aggregate, a first metal, and a second metal in a full-charge state of the metal secondary battery,
• the carbon fiber aggregate comprises a plurality of carbon fibers,
• the first metal is an alkali metal or an alkaline earth metal, the second metal is a metal alloyable with or an alloy alloyable with the first metal,
• the second metal is carried at least at a central portion of the carbon fiber aggregate in a thickness direction of the carbon fiber aggregate, and
• the second metal is in the form of particles;
• wherein the central portion of the carbon fiber aggregate in the thickness direction carries the second metal particles to facilitate nucleation of the first metal in the central portion of the carbon fiber aggregate.