工艺参数对NCM811半电池影响研究 - v1

　　

摘要：研究了半电池配方、压实密度工艺参数对团聚体LiNi_0.8Co_0.1Mn_0.1O₂（NCM811）正极材料电化学性能的影响。研究表明：配方中导电剂含量较低时有利于提升压实密度同时缓解颗粒破碎程度，但是导电剂的减少会略微影响倍率和循环性能。压实密度的提升可以增加活性物质和导电剂的接触，降低阻抗从而提升容量，但是会加剧正极材料颗粒破碎，从而导致循环过程中阻抗增加以及循环衰减。该研究为NCM811材料的开发和应用提供了实验依据，有助于推动高镍正极材料的进一步发展。

Abstract: The effects of half-cell formula and compaction density on electrochemical properties of LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) cathode material were studied. The results show that the low content of conductive agent in the formula is conducive to increasing the compaction density and alleviating the degree of particle breakage, but the reduction of conductive agent will slightly affect the rate and circulation performance. The increase of the electrode density can increase the contact between the active material and the conductive agent, reduce the impedance and thus increase the capacity, but it will also aggravate the particle breakage of the positive electrode material, resulting in increased impedance and cyclic attenuation during the cycle. This study provides experimental basis for the development and application of NCM811 materials, and is helpful to promote the further development of high nickel cathode materials.

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