Titanium-doped porous ternary material and preparation method thereof, half battery and lithium ion battery

Abstract

The invention provides a titanium-doped porous ternary material and a preparation method thereof, a half battery and a lithium ion battery. The preparation method comprises the following steps: carrying out water bath heating on an organic solvent with relatively low polarity or a mixed solvent formed by the organic solvent and water; adding a nickel salt, a cobalt salt and a manganese salt according to a certain molar ratio, and continuously stirring to uniformly disperse the nickel salt, the cobalt salt and the manganese salt; then adding excessive alkali liquor into the uniformly dispersed system, and carrying out hydrothermal treatment on the obtained system to obtain a mixed solution containing a nanoscale nickel-cobalt-manganese ternary precursor; washing the mixed solution containing the nanoscale nickel-cobalt-manganese ternary precursor with water, then adding a surfactant into the mixed solution and enabling a system to form an emulsion state, then adding a titanate coupling agent and an acid catalyst into the mixed solution, heating and stirring to react, and obtaining a titanate modified nickel-cobalt-manganese porous ternary precursor after the reaction is finished; and mixing the titanate modified nickel-cobalt-manganese porous ternary precursor with a lithium source, and sintering to obtain the titanium-doped porous ternary material.

Description

technical field [0001] The invention relates to a titanium-doped porous ternary material, a preparation method thereof, a half battery and a lithium ion battery, and belongs to the technical field of lithium ion batteries. Background technique [0002] Cathode materials are an important part of lithium-ion batteries, and ternary materials with a layered structure are considered to be the most promising cathode materials for lithium-ion batteries due to their low price, high capacity, good cycle performance, and high safety performance. one. However, ternary materials have some shortcomings, which seriously restrict their application and development. Many scholars at home and abroad have tried to improve the performance of ternary materials through surface coating and doping. However, there are few reports on the direct preparation of Ti-doped porous ternary materials. [0003] Therefore, providing a novel titanium-doped porous ternary material and its preparation method an...

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