Dicationic doped cobalt-free lithium-rich manganese-based porous nanofiber as well as preparation method and application thereof

• Main Authors: WANG XINCHANG, WANG CHAOQIANG
• Format: Patent
• Language: Chinese; English
• Published: 13.09.2022
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; BASIC ELECTRIC ELEMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; ELECTRICITY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NANOTECHNOLOGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; SPINNING; TEXTILES; TRANSPORTING

The invention belongs to the field of lithium ion battery positive electrode materials, and particularly relates to a dication-doped cobalt-free lithium-rich manganese-based porous nanofiber as well as a preparation method and application of the dication-doped cobalt-free lithium-rich manganese-based porous nanofiber. The chemical formula of the cobalt-free lithium-rich manganese-based positive electrode material is Li < 1.2 > Mn < 0.6-x > Ni < 0.2-3y/2 > Mg < x > B < y > O < 2 >, x represents the doping amount of Mg, y represents the doping amount of B, x is larger than or equal to 0.01 and smaller than or equal to 0.03, and y is larger than or equal to 0.01 and smaller than or equal to 0.02. The cobalt-free lithium-rich manganese-based nanofiber prepared by the method has a porous structure, and the large specific surface area of the cobalt-free lithium-rich manganese-based nanofiber is beneficial to improving the electrochemical performance of a material; meanwhile, the interplanar spacing of the material