...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Supercapacitor performance of perovskite La1-xSrxMnO3
【24h】

Supercapacitor performance of perovskite La1-xSrxMnO3

机译:Perovskite La1-xsrxmno3的超级电容器性能

获取原文
获取原文并翻译 | 示例
           

摘要

In this study, Sr-doped lanthanum manganite perovskites (La1-xSrxMnO3, LSM) as electrode materials for supercapacitors were prepared via an improved sol-gel method. Among LSM, the x = 0.15 sample shows superior electrochemical performance, delivering the highest specific capacitance of 102 F g(-1) at a current density of 1 A g(-1) and lower intrinsic resistance in 1 M KOH. The effective charge storage of LSM is due to the redox reaction of the anion intercalation corresponding to the surface redox processes of Mn2+/Mn3+ and Mn3+/Mn4+ occurring within the electroactive materials. The maximum energy density of 3.6 W h kg(-1) was achieved at a power density of 120 W kg(-1) for the symmetric supercapacitor with a long cycling life after 5000 charging and discharging cycles. With the increase of cycle times, the element leaching phenomenon leads to the decrease of electrochemical performance. Our work indicated that the perovskite manganite La0.85Sr0.15MnO3 shows potential applications in the field of pseudocapacitance electrode materials and is worthy of further investigation.
机译:在该研究中,通过改进的溶胶 - 凝胶法制备了作为超级电容器的电极材料的SR掺杂的镧锰镁石钙酸盐(La1-xsrxmnO 3,LSM)。在LSM中,X = 0.15样品显示出优异的电化学性能,以1Ag(-1)的电流密度,在1M KOH中的较低的固有电阻下提供102 f G(-1)的最高比电容。 LSM的有效电荷储存是由于阴离子嵌段对应于电活性物质内发生的MN2 + / MN3 +和MN3 + / MN4 +的表面氧化还原方法的氧化还原反应。在5000次充电和放电循环之后,以120W kg(-1)的功率密度为120W kg(-1)的功率密度,以5000次充电和放电循环,以长的循环寿命实现的最大能量密度。随着循环时间的增加,元素浸出现象导致电化学性能的降低。我们的工作表明,Perovskite Manganite La0.85SR0.15MNO3显示了伪宽容电极材料领域的潜在应用,值得进一步调查。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号