New method for synthesizing porous layered LNMCO (333 material for short)

Abstract

The embodiment of the invention discloses a new method for synthesizing porous layered LNMCO (a 333 material for short). The method is characterized by comprising the following steps: preparing a mixed solution of lithium acetate, cobalt acetate, nickel acetate and manganese acetate, which contains 0.10-0.2mol of fluxing system of hydroquinone and formaldehyde; heating and condensing the mixed solution into a gel product which takes a formaldehyde resin (a phenolic condensation compound) as a carrier and contains a variety of salts; and calcining the gel product in the temperature of 800-900 DEG C, then annealing the gel product to 700 DEG, and preserving heat for 24h so as to obtain a foamy porous product. The porous layered LNMCO originates from 2001; the research on application of the porous layered LNMCO has been widely carried out; and the porous layered LNMCO is low in cost, low in toxicity, green and environment-friendly, high in specific energy and high in specific power and is an optimal substitute material for LiCo2.

Description

technical field [0001] The invention relates to a novel method for synthesizing porous layered LNMCO (abbreviated as 333 material), which is a lithium-ion battery material, in particular, the cathode material belongs to the technical field of lithium-ion batteries. Background technique [0002] As a secondary green battery, lithium-ion batteries have been widely used in many fields such as portable electronic devices, and have begun to expand the market for large-capacity batteries such as electric vehicles. Due to the low capacity and high cost of market-oriented cathode materials, it is difficult to meet the high-capacity and low-cost requirements of electronic products and equipment. In recent years, cathode materials with high capacity, low price and good cycle stability have attracted widespread attention. [0003] This material originated in 2001, and the applied research of LNMCO (referred to as 333 material) has been widely carried out. It has low cost, low toxicity,...

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Problems solved by technology

[0004] The object of the present invention overcomes some deficiencies in the existing lithium battery cathode materials, such as: lithium cobalt oxygen: high price, cobalt is a toxic element, lithium manganese oxygen: low discharge specific capacity, poor high temperature performance, divalent manganese is soluble in electrolysis Liquid, lithium nickel oxygen: unstable structure, difficult synthesis, lithium iron phosphate system: poor low temperature performance, poor stability of synthetic batches and many other reasons

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