| abstract |
Metal nanowires arranged three-dimensionally, metal core particles existing on one surface of metal nanowires, pores existing between metal nanowires and metal core particles, and metal nanowires and metal core particles Provided is a negative electrode active material comprising a carbon-based coating layer present on the surface. Three-dimensionally arranged metal nanowires and pulverized metal core particles are connected with pores, and a carbon layer is coated on the surfaces of the metal nanowires and pulverized metal core particles. The negative electrode active material having the above structure. As a result, the volume change of the pulverized metal core due to charge and discharge is effectively buffered by the pores, but is electrically connected by the metal nanowire, so the volume change of the negative electrode active material is suppressed together with the carbon-based coating layer In addition, since electrode deterioration is prevented, improved initial efficiency and charge / discharge capacity can be provided. [Selection] Figure 1 |