摘要
采用PAA络合法并结合热处理技术制备了尖晶石结构的LiCo0.1Mn1.9O4纳米粉体,并考察了前驱体的热分解行为、粉体的结构、形貌及电化学性能。结果表明:随着烧结温度的升高,LiCo0.1Mn1.9O4粉体的颗粒尺寸略有增大,尖晶石型结构越来越完整。在电流密度0.1 mA/cm2,截止电压3.5～4.4 V时,在700℃烧结8 h得到性能较好的LiCo0.1Mn1.9O4粉体,首次放电比容量达124 mAh/g,稳定放电比容量大于110 mAh/g。
The spinel LiCo0.1Mn1.9O4 nano powder was synthesized by polyacrylic acid complexation process.The structure,morphology,electrochemical property and thermal decomposition behavior of the gel precursor was investigated.The results show that with the increase of sintering temperature,the powder possesses larger particles,higher crystallinity and more integrative structure.When current density is 0.1 mA/cm2 and cut-off voltage is 3.5 ～4.4 V,LiCo0.1Mn1.9O4 powder sintered at 700 ℃ for 8 h possesses the initial and stable discharge capacity of 124 mAh/g and above 110 mAh/g,respectively.
出处
《热加工工艺》
CSCD
北大核心
2010年第22期84-86,共3页
Hot Working Technology
基金
国家自然科学基金资助项目(20504026)
河南科技大学人才科研基金资助项目(04015)
