2.Towards understanding the effects of carbon and nitrogen-doped carbon
coating on the electrochemical performance of Li4Ti5O12 in lithium ion
batteries: a combined experimental and theoretical study
图1：氮元素掺杂碳包覆的Li4Ti5O12的表征结果：(A)为透射电镜图片，可以看出颗粒表面形成了均匀的无定型包覆层;(B)为包覆前后样品的XPS，包覆后出现了氮元素的峰。