摘要
采用一种新的低温熔盐燃烧法制备尖晶石型LiMn2O4物质。研究了在550℃时草酸和柠檬酸为燃料对燃烧产物物相组成及其电性能的影响。结果表明,燃烧产物的主晶相为LiMn2O4,含有Mn2O3杂质。在Li:Mn:草酸=1:2:0～1.5(摩尔比)时,草酸对燃烧产物纯度影响不大,Li:Mn:草酸=1:2:2.0时,产物纯度降低,柠檬酸对产物纯度影响较大,燃烧产物随柠檬酸用量增加先升高后降低;在Li:Mn:柠檬酸=1:2:0.5时所得产物纯度最高,其放电容量达到121mAh/g,但循环性能不是很理想。
A new low temperature molten-combustion method was introduced to prepare spinel LiMn2O4. The effects of oxalic acid and citric acid as fuels on the phase composition and electrochemical performance of products were studied. The results indicated that the main phase of products was LiMn2O4, and the impurity phase was Mn2O3. The effect of oxalic acid as fuel on the products was not obvious at the molar ratio of Li：Mn：oxalic acid=1：2：0-1.5（molar ratio）, but at Li：Mn：oxalic acid=1：2：2.0, the purity of the product decreased. However the effect of citric acid on the products was obvious. The purity of products increased when using small amount of citric acid, but decreased with increasing citric acid content. The purest product was obtained at Li：Mn：Citric acid=1：2：0.5, which had the capacity of 121 mAh/g, but the cyclic performance was not good .
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2009年第A02期22-25,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金重大研究计划面上项目(90610011)
云南省自然科学基金(2006E0091M)资助
