NOVELTY - A negative electrode comprises electrical power collector and negative electrode active material layer bonded with electrical power collector. The negative electrode active material layer comprises active material (a1) containing nano silicon manufactured by heat-processing the layered polysilane (SiH)n and having structure with 6-membered rings with silicon atoms, and active material (a2) containing graphite. The active material (a1) comprises complex comprising aggregate containing the nano silicon, and carbon layer which covered on portions of aggregate.    USE - Negative electrode is used in electrical storage apparatus e.g. nonaqueous secondary battery e.g. lithium ion secondary battery (all claimed) used as power supply of portable electronic device and electric vehicle.    ADVANTAGE - The nonaqueous secondary battery obtained using the negative electrode has excellent cycle characteristics due to relaxation in stress due to expansion and contraction during charging and discharging.    DETAILED DESCRIPTION - A negative electrode comprises electrical power collector and negative electrode active material layer bonded with electrical power collector. The negative electrode active material layer comprises active material (a1) containing nano silicon manufactured by heat-processing the layered polysilane of formula (SiH)n and having structure with 6-membered rings with silicon atoms, and active material (a2) containing graphite. The active material (a1) comprises complex comprising aggregate containing the nano silicon, and carbon layer which covered on portions of aggregate. The aggregate has structure in which nano-silicon particles are arranged in layered form and structure in which sheets are laminated into sheet-silicon component in thickness direction. The carbon layer is formed in the surface of an at least these sheet-silicon component, and has thickness of 1-100 nm. The standard deviation ( sigma ) of thickness and average thickness (R) satisfies a relation: R/3( sigma ) greater than 1. INDEPENDENT CLAIMS are included for the following:    (1) negative electrode active material;    (2) manufacture of negative electrode active material;    (3) complex; and    (4) manufacture of complex.