Preparation method of lithium ion battery positive electrode material
A technology for lithium ion batteries and cathode materials, which is applied in the field of preparation of cathode materials for lithium ion batteries, can solve the problems of complex preparation process and insufficient performance of cathode materials, and achieves the effects of high specific capacity, high specific capacity and large current discharge capacity.
Active Publication Date: 2015-12-30
浙江麦知网络科技有限公司
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[0005] The purpose of the present invention is to provide a preparation method of lithium ion battery cathode material, which prepares a cathode material with high specific capacity and high current discharge capacity by selecting optimized materials and utilizing an improved preparation process, so as to solve the current lithium ion battery The preparation process of the positive electrode material of the battery is complicated, and the performance of the prepared positive electrode material is insufficient.
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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0027] According to the preparation method of lithium-ion battery cathode material of a preferred embodiment of the present invention, it specifically comprises the following steps:
[0028] 1) Using high-purity lithium salts such as LiOH·H 2 O (preferably 99.9% pure), nickel salts such as NiO (preferably 99.99% pure), manganese salts such as MnO 2 (preferred purity 99.9%) as the raw material, according to Li, Ni, Mn molar ratio 1.5:0.5:1.5 weigh a certain amount of the above raw materials, then put it into a ball mill jar, add an appropriate amount of deionized water, ball mill for 8 hours and dr...
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The invention discloses a preparation method of a lithium ion battery positive electrode material. The method comprises the following steps: (1) dissolving high-purity lithium salt, nickel salt and manganese salt in deionized water in proportion, performing ball milling for 8 to 10 hours, and drying, wherein the content of the lithium salt is higher than 40-60%; (2) grinding a dried mixture for 1 to 2 hours, and pre-burning the mixture for 20 to 30 hours at the temperature of 700 to 800 DEG C; (3) grinding the raw material processed in the step (2) for 1 to 2 hours, tabletting under 25 to 35 MPa, sintering the raw material in a muffle furnace for 12 to 24 hours at the temperature of 1000 to 1100 DEG C to obtain a compact target material; (4) placing the obtained target material in a vacuum chamber, focusing the laser on the target material by utilizing an excimer laser via a lens, and transmitting plasma generated by the laser sputtering of the target material outwards to a substrate; and (5) maintaining the temperature and oxygen pressure constant, and performing in-situ annealing for 1 to 3 hours to obtain a film product which can be used as the lithium ion battery positive electrode material. The positive material prepared in the method is high in crystallinity and high in specific capacity and large-current discharge capacity.
Description
technical field [0001] The invention relates to a preparation method of a positive electrode material of a lithium ion battery. Background technique [0002] Micro-battery has become an important technical field and application direction. The specific capacity, cycle life, discharge capacity and safety of micro-battery directly affect its performance and application. The thickness of the all-solid-state thin-film lithium-ion battery can reach the order of microns. It has the advantages of safety and pollution-free, high specific capacity, high stability, and high-current discharge capacity. It has become an important branch of micro-batteries and has important influence and influence in actual production. application. [0003] For thin-film lithium-ion batteries, the cathode material has a key impact on cycle life, discharge capacity and safety. Therefore, how to prepare cathode materials with excellent performance is a key link to improve the performance of micro-batteries...
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Login to View More IPC IPC(8): H01M4/505H01M4/525H01M10/0525C23C14/08
CPCC23C14/08C23C14/3414H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 曾秀芳
Owner 浙江麦知网络科技有限公司