Anode material NbO for Li-ion battery and its electrochemical properties  

作　　者：Jian Li Wen-Wen Liu Hong-Ming Zhou Zhong-Zhong Liu Bao-Rong Chen Wen-Jiao Sun 

机构地区：[1]School of Materials Science and Engineering,Central South University,Changsha 410083,China [2]Hunan Zhengyuan Institute for Energy Storage Materials and Devices,Changsha 410083,China

出　　处：《Rare Metals》2018年第2期118-122,共5页稀有金属（英文版）

基　　金：financially supported by the National Science and Technology Support Project of China(No.2007BAE12B01);the Science and Technology Project of Changsha(No.k1201039-11)

摘　　要：The NbO electrode materials were successfully synthesized by high-temperature solid-phase method using Nb powders and Nb2O5 powders as raw materials. The crystalline structure, morphology, and electrochemical properties of the obtained materials were characterized by X-ray diffi＇action （XRD）, scanning electron microscopy （SEM）, dynamic light scattering instrument （DLSA）, half- cell charge-discharge tests, and cyclic voltammetry （CV）. The reaction mechanism of lithium with NbO was inves- tigated by ex-situ XRD studies. The results show that material average Li storage voltage is nearly located at 1.6 V, and the lithium intercalation into NbO remains a single-phase process. For the first discharge, a capacity of 355 mAh·g^-1 is obtained at a current rate of 0.1C, and 293 mAh·g^-1is maintained after 50 cycles, whereas a capacity of 416 mAh·g^-1 is obtained at a current rate of 0.1C alter ball milling. And 380 mAh·g^-1 reversible capacity remains for the ball milling sample.The NbO electrode materials were successfully synthesized by high-temperature solid-phase method using Nb powders and Nb2O5 powders as raw materials. The crystalline structure, morphology, and electrochemical properties of the obtained materials were characterized by X-ray diffi＇action （XRD）, scanning electron microscopy （SEM）, dynamic light scattering instrument （DLSA）, half- cell charge-discharge tests, and cyclic voltammetry （CV）. The reaction mechanism of lithium with NbO was inves- tigated by ex-situ XRD studies. The results show that material average Li storage voltage is nearly located at 1.6 V, and the lithium intercalation into NbO remains a single-phase process. For the first discharge, a capacity of 355 mAh·g^-1 is obtained at a current rate of 0.1C, and 293 mAh·g^-1is maintained after 50 cycles, whereas a capacity of 416 mAh·g^-1 is obtained at a current rate of 0.1C alter ball milling. And 380 mAh·g^-1 reversible capacity remains for the ball milling sample.

关 键 词：Niobium oxide ANODE ELECTROCHEMICALPROPERTIES Lithium-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ135.12[化学工程—无机化工]