A ball hydroxide oxidated Ni-Co-Mn and its making method

Abstract

The utility model discloses a spherical hydroxyl nickel oxide cobalt manganese and the fabrication method, relating to the anode material of a lithium battery, and aiming to provide a spherical hydroxyl nickel oxide cobalt manganese and the fabrication method. The fabricated anode material of the lithium battery has the advantages of big tap density, good electrochemical activity, big specific volumetric capacity, low synthesis temperature and short reaction time. The key points of the technical proposal of the utility model are that: the general formula of the spherical hydroxyl nickel oxide cobalt manganese is Ni1-x-yCoxMnyOOH; the spherical hydroxyl nickel oxide cobalt manganese and the fabrication method comprise the following steps: (1)a mixed salt solution of nickel, cobalt and manganese is confected according to the ratio that Ni:Co:Mn=1:(1 / 5-2 / 5):(1 / 5-2 / 5); (2) an alkaline solution of two to ten mol / L is confected; (3) the mixed salt solution of nickel, cobalt and manganese, the alkaline solution and the ammonia are conducted to an reaction kettle; (4) the intermediate products are added to the reaction kettle according to the solid-liquid ratio of 1:2 to 10, and reacted with the oxidant to produce the utility model. The utility model is used as the anode material of lithium batteries.

Description

Technical field: [0001] The invention relates to a lithium battery cathode material, in particular to a spherical nickel-cobalt-manganese oxyhydroxide and a preparation method thereof. Background technique: [0002] With Li(Ni 1 / 3 co 1 / 3 mn 1 / 3 )O 2 The representative multi-component composite metal oxide LiNi doped with Co and Mn 1-x-y co x mn y o 2 , (1 / 10≤x≤2 / 5, 1 / 10≤y≤2 / 5) has the advantages of Co-based, Ni-based and Mn-based cathode materials: high specific capacity, good cycle performance, and good thermal stability It is also environmentally friendly, the preparation conditions are relatively mild, and the material cost is low. It is expected to become a new generation of lithium-ion cathode materials. However, it is reported in the current literature that its tap density is low, which directly affects the LiNi 1-x-y co x mn y o 2 volume ratio capacity. In order to improve the tap density of the material, some documents (US2005 / 0089756A1) and Chinese pate...

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Problems solved by technology

However, it is reported in the current literature that its tap density is low, which directly affects the LiNi 1-x-y co x mn y o 2 volume specific capacity

In order to improve the tap density of the material, some documents (US2005 / 0089756A1) and Chinese patent application number 200410103486.8 prepared spherical Ni 1-x-y co x mn y (OH) 2 , and then use this as a precursor with Li 2 CO 3 Preparation of Spherical Li(Ni 1-x-y co x mn y )O 2 , this spherical Ni 1-x-y co x mn y (OH) 2 Although it has a high density, the valence state of each metal ion is divalent. As a synthetic lithium ion cathode material Li(Ni 1 / 3 co 1 / 3 mn 1 / 3 )O 2 The precursors show low reactivity, need to be carried out under high temperature and oxygen atmosphere, and the time required for synthesis is long

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