CN-120497333-B - Primary battery positive electrode material and preparation method thereof

Abstract

The invention discloses a primary battery positive electrode material and a preparation method thereof, wherein the battery positive electrode material is a material with a chemical formula of Nb α Cu β Mn γ O 2 , alpha is more than or equal to 0 and less than or equal to 0.15, beta is more than or equal to 0 and less than or equal to 0.4, beta is more than or equal to 1 and less than or equal to 1+gamma is less than or equal to 1.2 when beta is more than 0, and gamma is less than or equal to 1 when beta is less than 0, so that the volume expansion of sodium ions in the embedding process can be reduced in the discharging process of a battery.

Inventors

• CHEN PENG
• JIE BINYONG
• CAO SHIHAI

Assignees

• 嘉兴长篙新材料科技有限公司

Dates

Publication Date

20260508

Application Date

20250515

Claims (3)

1. 1. A primary battery comprises a positive plate, a diaphragm and a sodium plate, wherein the positive plate comprises a material with a chemical formula of Nb alpha Cu beta Mn gamma O2, alpha is more than or equal to 0.05 and less than or equal to 0.15, beta is more than or equal to 0.3 and less than or equal to 0.4, beta+gamma is more than or equal to 1 and less than or equal to 1.2, the positive plate is prepared by the following steps of S1, stirring and ultrasonic treatment of manganese dioxide and a metal oxide mixed material to obtain mixed powder, S2, heating and shearing the mixed powder after ultrasonic stirring in air at 120-200 ℃ for dispersion at a shearing line speed of 10-40m/S for 0.5-2 hours, S3, pressing the uniform mixed powder into small wafers with a diameter of 0.5-5 cm and a thickness of 0.5-5 cm by a tablet press, S4, placing the small wafers in a crucible, calcining the small wafers, carrying out calcination in air or oxygen atmosphere, cooling the mixed powder at a temperature of 500-900 ℃ to a temperature of 6 ℃ and a temperature of 6-12 ℃, and taking out a sieve for cooling the positive plate, and taking out the mixed powder.
2. 2. The primary battery according to claim 1, wherein the stirring ultrasonic treatment in the step S1 is performed at an ultrasonic power of 10-15KHz and a stirring speed of 0.5-5Kr/min for 0.5-2 hours.
3. 3. The primary battery according to claim 1, wherein the calcination in step S4 is performed in a muffle furnace or a tube furnace.

Description

Primary battery positive electrode material and preparation method thereof Technical Field The invention relates to the technical field of battery material preparation, in particular to a primary battery positive electrode material and a preparation method thereof. Background The primary battery is mainly applied to the fields of various intelligent meters, intelligent traffic, intelligent security, medical appliances and the like, and has wide market application fields. Meanwhile, with the advent of the 5G age, the market demands of various intelligent meters, intelligent traffic and intelligent security have increased greatly, and the market demands of high-energy lithium primary batteries are pulled indirectly, so that the market development prospect of the Chinese high-energy lithium primary batteries is optimistic. According to the data, the market scale of the 2022 Chinese lithium primary battery industry is about 62.6 hundred million yuan. The market size of the 2023 primary battery reaches 31.53 hundred million dollars, and the annual composite growth rate is 4.3%. Therefore, how to independently develop a sensing material with environmental protection and high sensitivity is a problem to be solved. The market mainly comprises lithium-manganese batteries, lithium-ion batteries and lithium-carbon fluoride batteries, and as people pay more attention to environmental protection and safety and reliability of the system in the 21 st century, further intensive researches on the battery system which is low in price, high in battery voltage, high in energy density, wide in working temperature range, good in high-rate discharge performance, long in storage time, safe and environment-friendly are important to primary battery research; Patent CN114497504B provides manganese dioxide with small volume expansion, which can effectively reduce the expansion degree of the positive electrode in the discharging process of the battery, and the positive electrode active material obtained by treatment is used for a lithium primary battery, but is used as a metal oxide such as titanium/vanadium, and the cost is high; Patent CN115395035B provides a water-activated magnesium primary battery and a preparation process of positive electrode slurry thereof. According to the formula of the positive electrode slurry, the graphene is used for constructing a conductive and heat-dissipating network in the positive electrode material according to the dispersibility of the graphene in an organic solvent, so that the heating of the battery in the use process is effectively improved, the problem of the volume expansion of the water-activated magnesium primary battery is also solved, but as magnesium in the negative electrode is relatively active, the reaction rate in a strong electrolyte solution is fast, however, the reaction rate of the positive electrode is low, the utilization rate of the electrode is often low, the water-activated magnesium primary battery releases a large amount of heat in the constant-current discharge process, the volume of the battery is obviously changed and even excessively expands, and the heat release and the volume problem are more serious along with the improvement of the reaction rate of the positive electrode; The patent CN103117384B forms lattice defects through anion doping, and improves the carrier concentration, so that the electrochemical performance of the lambda-MnO 2 lithium ion positive electrode material can be obviously improved. The preparation method is simple, does not need complex equipment, is clean and pollution-free, has low cost, and is suitable for industrial mass production. The material is a semiconductor, has weak electronic and ionic conductivity, poor discharge performance and low actual specific capacity, particularly when discharging at a large current, the specific capacity of high-potential discharge is obviously reduced, and the application of the material as a Li/MnO 2 lithium primary battery is greatly limited. Disclosure of Invention The invention aims to provide a primary battery positive electrode material and a preparation method thereof, wherein a simple and easy solid phase method is adopted to pretreat raw materials by stirring, ultrasonic treatment, heating, shearing, dispersing and the like, so that the raw materials are mixed more uniformly and then pressed into a wafer, then a metal oxide is embedded into manganese dioxide crystal lattice at high temperature by using a calcining mode in an air atmosphere, the crystal structure is stabilized, and the volume expansion of sodium ions in the embedding process can be reduced in the discharging process of a battery. The primary battery anode material provided by the invention comprises a material with a chemical formula of Nb αCuβMnγO2, wherein alpha is more than or equal to 0 and less than or equal to 0.15, and beta is more than or equal to 0 and less than or equal to 0.4; Beta >0, 1≤beta+gamma≤1.2, and beta=0, gamm