One-Step Synthesis of ZnNCN Nanoparticles with Adjustable Composition for an Advanced Anode in Lithium Ion Battery
Wenyuan He, Haibo Li, Bei Long, Manjun Xiao, Ting Song, Xianyou Wang, Yexiang Tong
Abstract
Designing an anode with a low-cost and simple preparation method is the key to developing the lithium ion battery. Here, ZnNCN nanoparticles are synthesized by one-step calcination of the mixture of melamine and zinc nitrate. By adjusting the reaction temperature, the pure ZnNCN with good crystalline character is obtained. The conversion-type mechanism of ZnNCN is proved by ex situ X-ray diffraction and electrochemical curves. More importantly, ZnNCN exhibits a high discharging capacity (405 mAh g–1 at 0.1 A g–1), an excellent rate property (140 mAh g–1 at 3 A g–1), and a long cyclic life (capacity fading per cycle of 0.025% during 700 cycles at 1.0 A g–1). Also, this work provides a new approach to prepare metal carbodiimides.