摘要
采用CTAB-C8H18-C4H9OH-H2O微乳体系制备出MnCO3,将其灼烧成Mn2O3之后,与Li2CO3混合,800℃高温焙烧,获得了颗粒大小为数百纳米,均匀分布的纯相尖晶石LiMn2O4。这一材料的电化学性能优秀,0.5C的电流在3￣4.2V之间充放电时,首次放电比容量为124mAh·g-1,经过110次循环,保留比容量118mAh·g-1,平均每次容量损失<0.05%。该材料的倍率性能尤为优异,10C放电的比容量在110mAh·g-1以上,功率约为0.2C时功率的45倍。
Micro-spherical type of MnCO3 was synthesized in CTAB-C8H18-C4H9OH-H2O microemulsion system. The MnCO3 was then decomposed to Mn203 and mixed with Li2CO3 and sintered at 800℃ for several hours to obtain the pure spinel LiMn2O4. The LiMn2O4 had initial discharge specific capacity of 124 mAh .g-i at 0.5C discharge current between 3 V and 4.2 V, and kept 118 mAh·g^-1 after 110 cycles, the loss ratio was lower than 0.05%. This material showed wonderful rate performance with cycle specific capacity of 110 mAh·g^-1 at 10C current and the power was 45 times of that at 0.2C.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2007年第1期21-24,共4页
Chinese Journal of Inorganic Chemistry
