摘要
通过自蔓延燃烧方法合成了性能优良的高电位5V锂离子电池正极材料LiNi0.5Mn1.5O4,利用傅立叶红外光谱(FTIR)、热分析(DSC/TG)、X射线衍射(XRD)、透射电镜(TEM)等方法对前驱物及样品的结构和物化性质等进行了分析和表征,考察了材料的电化学性能。结果表明,所制备样品具有单一的尖晶石相结构,具有4.7V充放电平台;在3.5V到5.2V之间进行充放电性能测试具有131mAh·g-1以上的可逆容量;在2C倍率下循环100次后的容量保持率为96%以上。
LiNi0.5Mn1.5O4 was synthesized through self-combustion reaction （SCR）. FTIR ,DSC/TG, XRD , and TEM were used for studying the spectrum, the structure, and the morphology of samples .The results show that LiNi0.5Mn1.5O4 has a good spinel structure and morphology ,and as well a good discharge/charge performance and cycle stability. The reversible capacity of LiNi0.5Mn1.5O4 reaches to 131 mAh. g^-1 between 3.5 V and 5.2 V and show a single voltage plateaus at around 4.7 V. The capacity retention of LiNi0.5Mn1.5O4 is 96% after 100 charge/discharge cycles at 2 C rate.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2009年第1期124-128,共5页
Chinese Journal of Inorganic Chemistry
基金
国家科学技术部重大科学研究计划课题(No.2006CB932703)
