摘要:
The invention relates to a composite material comprising carbon fibers and complex oxide particles, wherein the carbon fibers and the complex oxide particles have a carbon coating on at least part of their surface, said carbon coating being a non powdery coating The material is prepared by a method comprising mixing a complex oxide or precursors thereof, an organic carbon precursor and carbon fibers, and subjecting the mixture to a heat treatment in an inert or reducing atmosphere for the decomposition of the precursors The material is useful as the cathode material in a battery
摘要:
The invention provides composite graphite particles, comprising a core material consisting of graphite having a interlayer distance d(002) of 0.337 nm or less and a surface layer consisting of graphite in which the intensity ratio I D /I G (R value) between the peak intensities (I D ) in a range of 1300 to 1400 cm -1 and (I G ) in a range of 1580 to 1620 cm -1 as measured by Raman scattering spectroscopy is 0.3 or higher, wherein the peak intensity ratio I 110 /I 004 between the peak intensities (I 110 ) of face (110) and (I 004 ) of face (004) obtained by XRD measurement on the graphite crystal is 0.15 or higher when the graphite has been mixed with a binder and pressure-molded to a density of 1.55 to 1.65 g/cm 3 , which composite graphite particles are useful in a secondary battery negative electrode having a high capacity, high charge/discharge characteristics and an excellent charging property, and also provides a paste for negative electrode, a negative electrode and a lithium secondary battery using the composite graphite.
摘要翻译:本发明提供复合石墨颗粒,其包含由石墨构成的芯材,其中层间距离d(002)为0.337nm或更小,以及由石墨组成的表面层,其中峰强度之间的强度比ID / IG(R值) 通过拉曼散射光谱测定,在1300〜1400cm -1范围内的(ID)和1580〜1620cm -1的范围内的(IG)为0.3以上,其中,峰值强度比I 110 / I 004 当将石墨与粘合剂混合并加压成型至石墨晶体的密度时,在石墨晶体上通过XRD测量获得的面(004)的面(110)和(I 004)的峰强度(I 110)为0.15以上 1.55〜1.65g / cm 3,该复合石墨粒子可用于具有高容量,高充电/放电特性和优异的充电特性的二次电池负极,并且还提供了一种用于负极,负极和 锂秒 使用复合石墨的电池。
摘要:
The invention relates to a composite electrode material consisting of a carbon coated complex oxide, fibrous carbon and a binder. Said material is prepared by a method which comprises co-grinding an active electrode material and fibrous carbon, and adding a binder to the co-grinded mixture to lower the viscosity of the mixture. The fibrous carbon is preferably vapor grown carbon fibers.