Techniques , and their physico - chemical parameters such as specific areas , particle size distributions and diffusion coefficients are measured by the bet method , laser scattering technique and galvanostatic intermittent titration technique ( gitt ) , respectively . sem photographs show that these samples are made up of the irregular porous granules , which are conglobated by many small spherical crystals 温度助p ’ c贼品中有明显的尖晶石相杂质，充放电曲线表现出3v和4vmglz台，而焙烧温度在sic ’ c以下的样品充放电曲mn有一个3v平台，充放电循环过程中没出现明显的3v平台向4v平台转化的现象，表明该样品在循环过程中结构是愧箍淀的。
